WO2022141399A1 - Focus verification method, plan verification method, system, apparatus, and storage medium - Google Patents

Abstract

The present invention relates to the technical field of medical devices. Disclosed are a focus verification method, a plan verification method, a system, an apparatus, and a storage medium. The focus verification method comprises: acquiring an actual dose of a preset detection point detected by a detection apparatus (S401), the preset detection point being a detection point having a preset positional relationship with preset focuses of a plurality of radioactive sources; and according to the actual dose of the preset detection point and a theoretical dose of the preset detection point, performing position verification on the focuses of the plurality of radioactive sources (S402). The method can simplify the verification operation flow, and improve the operation initiative of an operator.

Description

Focus verification method, plan verification method, system, device and storage medium technical field

The present application relates to medical device technology, and in particular, to a focus verification method, plan verification method, system, device and storage medium.

Background technique

Radiation therapy, referred to as radiotherapy, has an increasingly prominent role and status in tumor treatment, and has become one of the main means of treating malignant tumors. With the continuous development of science and technology, the technology of radiotherapy equipment is constantly improving and updating.

In order to avoid radiation positioning errors during radiotherapy, quality assurance (QA) verification, such as focus position verification or radiotherapy plan verification, is required first. In the current technology, in the traditional verification method, the center of the beam target irradiated by radiotherapy in the radiotherapy equipment can be developed on the developing film by pressing the needle in conjunction with the developing film, and then scanning the film to obtain electronic development, and then QA verification is achieved by software analysis of the electronic imaging to determine the deviation of the corresponding verification.

However, the above-mentioned verification process in the manner of pressing the needle in conjunction with the developing film is cumbersome and involves a lot of hardware and software configurations, resulting in a low operating enthusiasm of the operator.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a focus verification method, a plan verification method, a system, a device and a storage medium, so as to simplify the operation process in the radiotherapy verification process and improve the operator's enthusiasm for operation.

In a first aspect, the embodiments of the present application provide a focus verification method for radiotherapy equipment, the focus verification method comprising:

acquiring the actual dose of a preset detection point detected by the detection device, where the preset detection point is the focus of a plurality of radiation sources or a detection point that has a preset positional relationship with the focus;

According to the actual dose of the preset detection point and the theoretical dose of the preset detection point, the position verification of the focal points of the plurality of radiation sources is performed.

In an implementation manner, the actual dose is the dose at the preset detection point detected by the detection device at the second time, and the theoretical dose at the preset detection point is the preset detection at the second time The theoretical dose of point;

Before performing position verification on the focal points of the plurality of radiation sources according to the actual dose of the preset detection point and the theoretical dose of the preset detection point, the method further includes:

Calculate the theoretical dose of the preset detection point at the second time according to the dose of the preset detection point at the first time, the interval duration and the preset ray attenuation function, and the interval duration is the first time and the the length of time before the second time.

In another implementation manner, before calculating the theoretical dose of the preset detection point at the second time according to the dose, the interval duration and the preset ray attenuation function of the preset detection point at the first time, The method also includes:

According to the position of the preset detection point, the dose of the preset detection point at the first time is obtained from a preset database, wherein the preset database stores: at least one preset at the first time The correspondence between the position of the point and the dose.

In another implementation manner, if the preset database stores: the correspondence between the positions of the multiple preset points at the first time and the dose; the acquisition of the first time from the preset database Before the preset dose, the method further includes:

Using a preset dose detection method to obtain the position and dose of a preset point at the first time;

According to the position and dose at the one preset point, using the preset linear relationship between the preset positions and the dose, calculate the other preset points among the multiple preset points at the first time location and dose;

The correspondence between the positions of the multiple preset points and the dose at the first time is stored in the preset database.

In yet another implementation manner, if the preset database stores: the correspondence between the positions of the multiple preset points at the first time and the dose, the multiple preset points include: a preset isocenter and a preset Setting a maximum dose point; before acquiring the dose at the preset point at the first time from the preset database, the method further includes:

Obtain the position and dose of the preset isocenter point at the first time by using a preset dose detection method;

Acquiring the dose of each position of the first time detected by the detection device in the process of moving with the preset isocenter position as the origin position and using the preset motion step;

According to the doses at the respective positions, determining the position with the maximum dose from the respective positions as the position of the preset maximum dose point;

Store the corresponding relationship between the position of the preset isocenter point and the dose at the first time, and the corresponding relationship between the position and the dose of the preset maximum dose point at the first time, in the preset database. .

In yet another implementation manner, the performing position verification on the focal points of the multiple radiation sources according to the actual dose at the preset detection point and the theoretical dose at the preset detection point includes:

comparing the actual dose at the preset detection point with the theoretical dose at the preset detection point;

If the first dose deviation of the preset detection point is within the preset dose deviation range, the position verification of the focus is performed according to the position of the preset detection point, wherein the first dose deviation is the The deviation between the actual dose at the preset detection point and the theoretical dose at the preset detection point.

In yet another achievable manner, the performing position verification on the focal points of the multiple radiation sources according to the actual dose of the preset detection point and the theoretical dose of the preset detection point, further includes:

If the first dose deviation is not within the dose deviation range, acquiring the dose of the surrounding points of the preset detection point detected by the detection device;

Perform position verification on the focal point according to the position of the target point in the surrounding points, wherein the target point is the surrounding point, and the deviation of the dose from the theoretical dose of the preset detection point is within the dose deviation points within the range.

In yet another implementation manner, if the preset detection point is a preset maximum dose point; the performing position verification on the focus according to the position of the target point in the surrounding points includes:

If the second dose deviation of the target point is within the dose deviation range, the target point is determined as the actual maximum dose point, wherein the second dose deviation is the difference between the dose of the target point and the preset dose Deviation of the theoretical dose at the maximum dose point;

According to the position of the actual maximum dose point, the position of the actual isocenter point is determined by adopting the positional relationship between the preset isocenter point and the maximum dose point;

Position verification is performed on the focus according to the position of the actual isocenter and the position of the preset isocenter.

In yet another implementation manner, if the preset detection point is a preset isocenter point, performing position verification on the focus point according to the position of the target point in the surrounding points includes:

If the third dose deviation of the target point is within the dose deviation range, the position of the target maximum dose point is determined according to the position of the target point and the positional relationship between the preset isocenter and the maximum dose point, Wherein, the third dose deviation is the deviation between the dose at the target point and the theoretical dose at the preset isocenter;

If the position deviation of the target maximum dose point is within a preset position deviation range, the target point is determined to be the actual isocenter, wherein the position deviation is the position of the target maximum dose point and the preset maximum dose point. deviation of the position of the dose point;

Position verification is performed on the focus according to the position of the actual isocenter and the position of the preset isocenter.

In yet another implementation, the method further includes:

If the position deviation is not within the position deviation range, determining that the target point is a pseudo isocenter;

Continue to search for a target point from the surrounding points where the deviation of the dose from the theoretical dose of the preset isocenter point is within the dose deviation range, until the found target point is the actual isocenter point.

In a second aspect, the embodiments of the present application may further provide a method for verifying a radiotherapy plan, and the method for verifying a radiotherapy plan includes:

acquiring the actual dose of the target point corresponding to the focal points of the multiple radioactive sources detected by the detection device, where the target point is a target point in the radiotherapy plan;

The radiotherapy plan is verified according to the actual dose of the target and the planned dose of the target in the treatment plan.

In a possible implementation manner, the verification of the radiotherapy plan according to the actual dose of the target and the planned dose of the target in the treatment plan includes:

Determine the dose verification result of the target point according to the actual dose of the target point and the planned dose of the target point;

The treatment plan is validated according to the dose validation result of the target.

In another possible implementation, if the radiotherapy plan includes at least two targets, the method further includes:

obtaining target doses of other targets in the at least two targets, and the other targets are targets other than the target targets in the at least two targets;

Determine the dose verification result of the other target according to the target dose of the other target and the planned dose of the other target in the radiotherapy plan;

The verification of the treatment plan according to the dose verification result of the target, includes:

If the dose verification results of the target target and the other targets are all passed, it is determined that the radiotherapy plan is verified to pass.

In yet another possible implementation, the obtaining the target doses of the other targets in the at least two targets includes:

The actual dose of the other target points corresponding to the focus detected by the detection device is acquired as the target dose of the other target points.

In yet another possible implementation, the method further includes:

acquiring the actual dose of other detection points detected by the detection device other than the focal point, and the other detection points have a preset positional relationship with the focal point;

Determine the dose verification result of the other detection points according to the actual dose of the other detection points and the planned dose of the other detection points;

The verification of the treatment plan according to the dose verification result of the target, includes:

If the dose verification results of the target point and the other detection points are all passed, it is determined that the radiotherapy plan is verified to pass.

In yet another possible implementation manner, before determining the dose verification result of the other detection points according to the actual dose of the other detection points and the planned dose of the other detection points, the method includes:

obtaining the dose distribution formed by the target in the treatment plan;

According to the dose distribution and the planned dose of the target point corresponding to the focal point, the planned dose of the other detection points having the preset positional relationship with the focal point is determined.

In a third aspect, an embodiment of the present application further provides a radiotherapy verification system, including: radiotherapy equipment, a detection device, and a processor; wherein, the radiotherapy equipment includes: a plurality of radiation sources, and the rays of the plurality of radiation sources are focused on a preset focus, the detection device is arranged on the treatment couch of the radiotherapy equipment, and is used to detect the actual dose at the preset detection point, the processor is connected to the detection device, and is used to execute the first aspect or the first aspect The method of any one of the two aspects.

In a fourth aspect, an embodiment of the present application may further provide a verification apparatus, including: a memory and a processor, where the memory stores a computer program executable by the processor, and the processor implements the above when executing the computer program The method of any one of the first aspect or the second aspect.

In a fifth aspect, the embodiments of the present application further provide a non-volatile storage medium, where a computer program is stored on the storage medium, and when the computer program is read and executed, any of the above-mentioned first aspect or the second aspect can be realized. a described method.

The focus verification method, plan verification method, system, device, and storage medium provided by the embodiments of the present application can use the actual dose of the preset detection point detected by the detection device and the theoretical dose of the preset detection point to determine the multiple radiation sources. The focus position is verified. In the process of focus verification, as long as the detection probe of its detection device is sent to the preset detection point, the actual dose of the preset detection point can be obtained, and then the focus position is verified by comparison. There is no need for the user to perform too many operations, which effectively simplifies the operation process of the focus verification process, reduces the required software and hardware configuration, and improves the operator's enthusiasm for operation. Compared with the way of pressing the needle and developing the film, it effectively improves the verification efficiency.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic diagram of a radiotherapy verification system provided by an embodiment of the application;

FIG. 2 is a schematic structural diagram of a detection device provided by an embodiment of the present application;

3 is a schematic structural diagram of another detection device provided by an embodiment of the present application;

FIG. 4 is a flowchart of a focus verification method for a radiotherapy device provided by an embodiment of the present application;

FIG. 5 is a flowchart of another focus verification method for radiotherapy equipment provided by an embodiment of the present application;

FIG. 6 is a schematic flowchart of a storage method of the correspondence between the positions of a plurality of preset points and the dose according to an embodiment of the present application;

7 is a schematic flowchart of another storage method of the correspondence between the positions of multiple preset points and the dose according to an embodiment of the present application;

FIG. 8 is a flowchart of still another focus verification method of a radiotherapy device provided by an embodiment of the present application;

FIG. 9 is a flowchart of a method for performing focus position verification when the preset detection point is a preset maximum dose point according to an embodiment of the present application;

10 is a flowchart of a method for performing focus position verification under the condition that a preset detection point is a preset isocenter point provided by an embodiment of the present application;

11 is a flowchart of a method for verifying a radiotherapy plan provided by an embodiment of the present application;

FIG. 12 is a flowchart of another radiotherapy plan verification method provided by an embodiment of the present application;

FIG. 13 is a flowchart of another radiotherapy plan verification method provided by an embodiment of the present application;

FIG. 14 is a flowchart of still another radiotherapy plan verification method provided by an embodiment of the present application;

15 is a schematic diagram of a focus verification device of a radiotherapy apparatus provided by an embodiment of the application;

16 is a schematic diagram of a radiotherapy plan verification device provided by an embodiment of the application;

FIG. 17 is a schematic diagram of a verification apparatus provided by an embodiment of the present application.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments.

Radiation therapy is a high-precision treatment technology. For radiotherapy equipment, whether it is before the radiotherapy equipment is put into radiotherapy application, or after the radiotherapy equipment is put into radiotherapy application, if the radiotherapy equipment is used for radiotherapy, in order to avoid the radiation positioning error during the radiotherapy process. , and QA verification is required for the radiotherapy equipment. The QA verification of the radiotherapy equipment may include: position verification of the focal points of multiple radiation sources in the radiotherapy equipment, and dose verification of the radiotherapy plan using the radiotherapy equipment.

The QA verification provided by the embodiments of the present application, such as the focus verification of radiotherapy equipment and the verification method of radiotherapy plan, can be verified based on the dose detected by the detection device disposed at the target position on the treatment couch.

For example, the focal positions of multiple radiation sources can be verified by the actual dose of the preset detection point detected by the detection device and the theoretical dose of the preset detection point to verify the ray focus and to verify the placement error of the patient. For another example, the radiotherapy plan can also be verified through the actual dose of the target detected by the detection device and the planned dose of the target, so as to verify the dose deviation of the target in the radiotherapy plan, so as to ensure that the patient receives the treatment plan. on-target dose.

The treatment couch mentioned above may also be a three-dimensional couch (ie, a three-dimensional treatment couch) or a six-dimensional couch (ie, a six-dimensional treatment couch). The radiation therapy equipment includes a gamma knife, and the radiation source device of the radiation therapy device may be a radiation source device for a predetermined body part (for example, a head, a body part). Correspondingly, the radiation therapy device includes a gamma knife for a predetermined body part, Such as head gamma knife or other body gamma knife.

In order to realize QA verification, the embodiments of the present application provide a radiotherapy verification system. The radiotherapy verification system is first described as an example with reference to the accompanying drawings as follows. FIG. 1 is a schematic diagram of a radiotherapy verification system provided by an embodiment of the application. As shown in FIG. 1 , the verification system includes: a radiotherapy device including a radiation source device 11 and a treatment couch 12 , and may further include: a detection device 13 , wherein , the radiation source device 11 can be provided with a plurality of radiation sources, and the detection device 13 can be fixedly arranged with the treatment couch 12 , so that the treatment couch 12 can drive the detection device 13 to move. The detection bracket of the detection device 13 is connected to the adapter device on the treatment couch 12 . The detection device 13 may be provided with at least one detector, which includes: a target detector with the detection head facing the direction of the focal points of the multiple radiation sources. The detection device 13 disposed on the treatment couch 12 can move with the movement of the treatment couch 12 , so that the position of the target detector in the three-dimensional coordinate system of the treatment couch 12 can be determined through the position of the treatment couch 12 . The detection device 13 in FIG. 1 is only a possible example of setting one detector, which is not limited in the present application. The radiation source device 11 in FIG. 1 has the radiation source device matched with the head radiotherapy equipment. There may be differences in the shape of the radiation source device for different body parts and the relative position with the treatment couch 12 , which is not taken as a basis in this application. limit.

The possible implementations of the detection device 13 are exemplified as follows with reference to the accompanying drawings. FIG. 2 is a schematic structural diagram of a detection device according to an embodiment of the present application. As shown in FIG. 2 , the detection device 13 may include: at least one detector 131 and a detection bracket 132 . At least one detector 131 may be disposed on the detection bracket 132 . It should be noted that, in FIG. 2 , one detector is used as an example for description, and a plurality of detectors may also be provided on the detection device. Each detector 131 includes: a preset type of probe, such as a semiconductor probe, the preset type of probe can be used to measure the radiation dose. The probe of the detector 131 in the detection device involved in the present application may be a probe with a radiation detection function, and the type of the probe may be, for example, a semiconductor probe, that is, a probe using a semiconductor material as a detection medium, or it may be other The material is the probe of the detection medium, which can mainly realize radiation detection, which is not limited in the embodiment of the present application.

The detection bracket 132 can be a bracket matched with the corresponding adapter device on the treatment couch 12 , so as to realize the setting of the detection device 13 on the treatment couch 12 . For example, the detection bracket 132 can be, for example, a U-shaped bracket, and the corresponding adapter device on the treatment couch 12 can be, for example, an adapter adapted to the U-shaped bracket, or an L-shaped bracket adapted to the U-shaped bracket. The probe head of the target detector in the at least one detector 131 may face the focus direction of the plurality of radiation sources in the radiation source device 11 . For example, if there is one detector, the one detector is the target detector. During the detection process, the probe of the one detector can be directed towards the focus direction of the multiple radiation sources; if there are multiple detectors, Then the detector set in the middle position of the multiple detectors can be the target detector or other detectors. During the detection process, ensure that the probe of the target detector faces the focal direction of the multiple radiation sources. Can.

The position of at least one detector in the detection device 13 is fixed and pre-embedded and cannot be moved. During the relative movement of the detection device 13 with the treatment couch 12 and the radiation source device 11 , the positions of the focal points of multiple radiation sources in the radiation source device 11 can be determined using a preset symmetrical relationship according to the detected dose. The preset symmetrical relationship may be a symmetrical distribution of dose distribution on the focal plane after the rays emitted by the multiple radiation sources pass through the preset collimator, that is, symmetrical distribution of doses on both sides of the focal point on the focal plane.

It is assumed that if the detection device 13 includes a plurality of detectors 131 , that is, the number of detectors 131 is a plurality, the probes of the plurality of detectors 131 , such as semiconductor probes, can be respectively oriented to three coordinates in the preset three-dimensional coordinate system. different positions in the direction.

Illustratively, the number of detectors 131 may be three. The following describes the detection device 13 provided with three detectors in conjunction with the accompanying drawings. In other possible implementations, the number of detectors in the detection device 13 may also be 2 or other quantities, which are not limited in this application. FIG. 3 is a schematic structural diagram of another detection device provided by an embodiment of the present application. As shown in FIG. 3 , the detection device 13 may include: three detectors 131 and a detection bracket 132 . Three detectors 131 may be provided on the detection bracket 132 . Optionally, the detection device 13 may further include: a phantom 133 . A probe such as a semiconductor probe of the at least one probe may be located within the phantom 133 . It should be noted that, in the case of three detectors 131 in FIG. 3 , the probes of the three detectors 131 are arranged in the phantom 133 , but in other possible implementations, if one detector is included 131 , or in the case of a plurality of detectors 131 , the probes of the detectors can also be arranged in the phantom 133 .

Optionally, a detector accommodating cavity corresponding to the number of detectors may also be provided in the mold body 133 for accommodating at least one probe of the detector 131 , such as a semiconductor probe. For the three detectors 131 shown in FIG. 3 , the phantom 133 may be provided with three detector accommodating cavities to respectively accommodate the probes of the three detectors, such as semiconductor probe heads. In order to ensure the different positions of the probes of the multiple detectors 131 in the three coordinate directions in the preset three-dimensional coordinate system, the positions of the multiple detector accommodating cavities in the phantom 133 in the three coordinate directions are different.

Optionally, the mold body 133 shown above may be spherical, for example, and its material may be plexiglass, for example.

Optionally, in order to ensure stable arrangement between the phantom body 133 and the detection bracket 132 , the detection device 13 may further include a phantom body connecting piece, and the phantom body 133 is disposed on the detection bracket 132 through the phantom body connecting piece.

Continuing to take the three detectors 131 shown in FIG. 3 as an example, the detector in the middle is the preset origin, that is, the probes of the detector in the middle face the focal direction of the multiple radiation sources, that is, the detector in the middle is for the target detector.

In order to ensure that the rays emitted by the multiple radioactive sources can be detected by the three detectors shown in Figure 3, the multiple radioactive sources can use a preset maximum collimator, that is, a collimator. The collimation hole is the preset maximum collimation hole.

The positions of the three detectors in the three-dimensional coordinate system of the treatment couch 12 in three coordinate directions, such as the three coordinate directions of X, Y, and Z, are all different. For example, among the three detectors shown in Figure 3, the position of the leftmost detector and the origin, that is, the position of the middle detector, are offset by -10mm in the X coordinate direction and 10mm in the Y coordinate direction. The position of the detector on the right is offset by 10mm in the Z coordinate direction; the position of the detector on the right and the origin, which is the position of the middle detector, are offset by 10mm in the X coordinate direction, -10mm in the Y coordinate direction, and -10mm in the Z coordinate direction.

The probes of the three detectors 131 can all be fixed in the phantom body 133 . In this way, when the detection device 13 moves with the movement of the treatment couch 12 , the phantom body 133 penetrates deep into the radiation source device 11 , so that the radiation source device can be moved. The radiation emitted by the multiple radiation sources in 11 irradiates the surface of the phantom 133 , so that the three detectors 131 can detect doses at three different coordinate positions. In this way, when the three detectors 131 respectively detect the doses at the corresponding coordinate positions, the focal points of the multiple radiation sources can be reversely deduced according to the doses detected by the intermediate detectors and the dose relationship of the three coordinate positions position deviation.

The mold body 133 can be a spherical mold body. As mentioned above, the material of the detection bracket 132 and the mold body 133 can be selected from high-strength aviation aluminum alloy materials. Can be aluminum alloy. The positions of the three detectors in the detection device 13 are all fixed and embedded and cannot be moved. The detection device 13 as a whole moves with the movement of the treatment couch 12 .

Regardless of the detection device mentioned above, in order to realize the focus verification of the radiotherapy equipment, a connector can be drawn from the center hole of the detection bracket 132, and connected to the control cabinet through an external connection cable, and the analog-to-digital conversion for the detector set in the control cabinet is used. After the module is converted, it is transmitted to the upper computer of the communication connection of the control cabinet. For example, the connection head can enter the drag chain along with the equipment cable through the external connection line, and be led out from the treatment couch 12 to the control cabinet.

In this way, the host computer can obtain the data such as the dose detected by the detector in the detection device 13, and then execute the focus verification method of the radiotherapy equipment provided by the following embodiments of this application, or the verification method of the radiotherapy plan, and the host computer can also Supports functions such as verification results and the export of detected dose data.

It should be noted that the above-mentioned radioactive source may also be referred to as a radioactive source device or other similar descriptions, which are not limited in the embodiments of the present application.

With reference to a plurality of examples as follows, the focus verification method of the radiotherapy equipment provided by the embodiments of the present application is firstly explained with examples. FIG. 4 is a flowchart of a focus verification method for a radiotherapy device provided by an embodiment of the present application. The focus verification method can be implemented by a host computer that is communicatively connected to the detection device in the radiotherapy verification system. The communication connection method between the detection device and the host computer is referred to above, and will not be repeated here. By executing the focus verification method, the focus positions of multiple radioactive sources in the radiotherapy equipment can be verified, that is, the position deviation of the focus can be verified, so as to ensure the positioning error of radiotherapy, accurately locate the positioning fault of the radiotherapy equipment, and ensure the positioning accuracy of radiotherapy. . The dose detected by the detection device involved in the focus verification method may be the dose detected by a target detector in at least one detector of the detection device, and the target detector may be one of the detectors shown in FIG. 2 or the above-mentioned FIG. 3 The detector in the middle of the three detectors, or, in other forms. In any case, it is necessary to ensure that the probe of the target detector faces the detector in the focus direction of the multiple radiation sources.

As shown in Figure 4, the method may include:

S401. Acquire the actual dose of the preset detection point detected by the detection device.

The actual dose of the preset detection point detected by the detection device may be detected by a target detector in the detection device, for example.

In the application process, the treatment couch can be controlled to move toward the radiation source device, and when the treatment couch is deep into the preset position in the radiation source device, the detection head of the target detector set on the treatment couch can be placed in the radiation source device. The preset detection point in the source device, in this way, the probe of the target semiconductor detector can be sent to the preset detection point. The preset detection point may be, for example, the focal points of the multiple radiation sources, or a detection point having a preset positional relationship with the focal points, such as a preset isocenter point of the multiple radiation sources, or a preset maximum dose point. Wherein, the focus can be coincident with the preset isocenter, and the preset maximum dose point has a preset linear relationship with the position and dose of the preset isocenter.

When the detection head of the target detector is located at a preset detection point in the radiation source device, the target detector can detect the dose of the preset detection point. The dose of the preset detection point detected by the target detector is the actual dose of the preset detection point.

It should be pointed out that, in the methods provided in the embodiments of the present application, the involved dose refers to descriptions such as radiation absorption dose or irradiation dose, and the present application does not limit the specific description.

S402. Perform position verification on the focal points of the multiple radiation sources according to the actual dose of the preset detection point and the theoretical dose of the preset detection point.

Exemplarily, before performing focus verification, the calibrated dose of the preset detection point is obtained in the process of calibrating the position and dose of the preset detection points in the plurality of radiation sources, and after the calibration, the preset detection point can be calibrated. The correspondence between the position of the point and the calibrated dose is stored. In a specific implementation, the pre-stored calibrated dose of the preset detection point may be acquired, and based on the calibrated dose of the preset detection point, the theoretical dose of the preset detection point may be calculated.

After obtaining the actual dose of the preset detection point and the theoretical dose of the preset detection point, the actual dose of the preset detection point and the theoretical dose of the preset detection point can be compared, and according to the comparison result, adopt The verification method corresponding to the comparison result is to verify the positions of the focal points of the plurality of radiation sources. Specifically, according to the comparison result, a verification method corresponding to the comparison result can be used to determine the position of the actual isocenter, and then the positional deviation of the focus can be calculated according to the position of the actual isocenter and the preset isocenter, Implements location validation for that focus.

The focus verification method of the radiotherapy equipment provided by the embodiment of the present application can use the actual dose of the preset detection point detected by the detection device and the theoretical dose of the preset detection point to verify the focus positions of the multiple radiation sources. During the process, as long as the probe of the detection device is sent to the preset detection point, the actual dose of the preset detection point can be obtained, and then the focus position can be verified by comparison without the need for the user to perform too many operations. , which effectively simplifies the operation flow of the focus verification process and reduces the required software and hardware configuration, thereby improving the operator's enthusiasm for operation. Compared with the way of pressing the needle and developing the film, it effectively improves the efficiency of focus verification.

In addition, in this focus verification method, since the required software and hardware configuration is reduced, the cost of focus position verification is also reduced.

In some other implementation manners, the embodiments of the present application may further provide an implementation example of a method for focal verification of radiotherapy equipment. In this implementation example, the actual dose may be the dose at the preset detection point detected by the second time detection device, and the theoretical dose at the preset detection point is the theoretical dose at the preset detection point at the second time. FIG. 5 is a flowchart of another focus verification method of a radiotherapy apparatus provided by an embodiment of the present application. As shown in Figure 5, in the above method, according to the actual dose of the preset detection point and the theoretical dose of the preset detection point in S402, before performing position verification on the focal points of the plurality of radiation sources, the method may further include:

S501. Calculate the theoretical dose of the preset detection point at the second time according to the dose of the preset detection point, the interval time and the preset ray attenuation function at the first time.

The interval duration is the duration before the first time and the second time. The first time may be a preset calibration time, the dose of the preset detection point at the first time may be the first time, and the calibrated dose of the preset detection point, that is, at the first time, the preset detection point The position of the point and the dose are calibrated to determine the dose. The second time may be the time to obtain the dose detected by the detection device during the focus verification process, that is, the detection time of the actual dose of the preset detection point.

The ray attenuation function may be a ray attenuation function corresponding to a radioactive source among the plurality of radioactive sources. Different types of radiation sources have different corresponding radiation attenuation functions, and the radiation attenuation functions can be used to characterize the function of radiation attenuation of the multiple radiation sources over time. Based on this, according to the dose of the preset detection point at the first time and the interval duration, the ray attenuation function can be used to predict the theoretical dose of the preset detection point at the second time after the interval duration to obtain the The theoretical dose of the preset detection point at the second time.

Optionally, in the above method in S501, before calculating the theoretical dose of the preset detection point at the second time according to the dose of the preset detection point, the interval time and the preset ray attenuation function at the first time, the method further: Can include:

S501a, according to the position of the preset detection point, obtain the dose of the preset detection point at the first time from a preset database, wherein the preset database stores: the position of at least one preset point at the first time Correspondence with dose.

At the first time, by calibrating the position and dose of at least one preset point of the plurality of radiation sources, a corresponding relationship between the position and the dose of each preset point at the first time can be established, and the first time The corresponding relationship obtained by calibration is stored in a preset database, so that the dose of the preset detection point at the first time can be obtained from the preset database according to the position of the preset detection point.

The at least one preset point includes: a preset isocenter point, and/or a preset maximum dose point.

Optionally, if the preset database stores: the correspondence between the positions of the multiple preset points at the first time and the dose, for example, the preset database stores the correspondence between the positions of the preset isocenters and the dose. , the corresponding relationship between the position of the preset maximum dose point and the dose. FIG. 6 is a schematic flowchart of a storage method of the correspondence between the positions of a plurality of preset points and the dose according to an embodiment of the present application. As shown in FIG. 6 , before acquiring the dose of the preset detection point at the first time from the preset database according to the position of the preset detection point in the above S501a, the method may further include:

S601. Using a preset dose detection method, acquire the position and dose of a preset point at the first time.

S602. According to the position and dose at the one preset point, using the preset linear relationship between the preset positions and the dose, calculate the other preset points among the multiple preset points at the first time. location and dose.

For example, in practical applications, the dose at the preset isocenter may be smaller than the dose at the preset maximum dose point, but the position and dose between the preset maximum dose point and the preset isocenter have a preset linear relationship. . Therefore, the position and dose of the maximum dose point at the first time can be calculated based on the obtained position and dose of the preset isocenter point at the first time, using the preset linear relationship between the position and the dose, respectively. It should be noted that, in practical applications, the dose at the preset isocenter point may be smaller than the dose at the maximum dose point.

As shown above, the preset dose detection method can be, for example, a film detection method, such as a method of pressing a needle to cooperate with a developing film, for example, a film detection method can be used to detect the position and dose of the preset isocenter at the first time . Of course, the above-mentioned dose detection manner may also be other detection manners, which are not limited in the embodiments of the present application.

S603. Store the correspondence between the positions of the plurality of preset points and the dose at the first time in the preset database.

When the position and dose of the one preset point at the first time are obtained through the above S601, and the positions and doses of the other preset points at the first time are obtained through the above S602, the multiple presets at the first time are obtained. The corresponding relationship between the position of the point and the dose, and based on the corresponding relationship, a relationship model of the three-dimensional space position and dose of the position and dose of the plurality of preset points of the plurality of radiation sources is established, and then the relationship model is stored in the preset database.

In the focus verification method provided by this embodiment, the position and dose of the one preset point can be acquired at the first time, and the linear relationship between the position and the dose between the preset points can be used to calculate other preset points at the first time The position and dose of the preset point are calibrated at the first time, and the calibration efficiency of the position and dose of the preset point is improved.

In some other achievable manners, the embodiments of the present application further provide a manner of acquiring the correspondence between the positions of multiple preset points and the dose in the preset database. In this implementation manner, the multiple preset points include: a preset isocenter point and a preset maximum dose point as an example for description. FIG. 7 is a schematic flowchart of another storage method of the correspondence between the positions of multiple preset points and the dose provided by the embodiment of the present application. As shown in FIG. 7 , before obtaining the dose of the preset detection point at the first time from the preset database according to the position of the preset detection point in the above S501a, the method may further include:

S701. Using a preset dose detection method, acquire the position and dose of the preset isocenter point at the first time.

For example, a preset dose detection method can be used to determine the position and dose of the preset isocenter point at the first time, and the preset isocenter point is the original focus position after calibration, and record the original focus position after calibration. Focus position and dose, and then store the calibrated correspondence between the original focus position and dose, that is, the position and dose of the preset isocenter at the first time, into the preset database. The preset dose detection mode may be, for example, a film detection mode, or a dose detection mode of a detection device.

S702: Acquire the dose of each position at the first time detected by the detection device in the process of moving with the preset isocenter point as the origin position and using the preset motion step size.

S703. According to the doses at the respective positions, determine the position with the maximum dose from the respective positions as the position of the preset maximum dose point.

After the position and dose of the preset isocenter point are calibrated, the connection bracket between the detection device and the treatment couch in the radiotherapy equipment, such as the detection bracket 132 in the above-mentioned FIG. 2 or FIG. 3, can be fixed, and then connected The detection device is connected to the bracket. After the detection device is connected, it is necessary to ensure that the probe of the target detector in the detection device faces the focus direction of the multiple radiation sources.

After the detection device is connected and set, the treatment couch can be controlled to move toward the radiation source device, so that the detection head of the target detector in the detection device can be sent to the position of the preset isocenter, and the preset isocenter can be moved. The position of the point is used as the preset coordinate origin of the target detector, and the treatment couch is controlled along the preset coordinate origin, according to the preset motion step length, within the preset motion range, to perform continuous motion in three coordinate directions and The scan records the corresponding position and dose after the movement. The preset movement range may be, for example, the zero position of the preset coordinate origin, and the preset movement range in the three coordinate directions, such as -50mm to +50mm in the three coordinate directions. The movement sequence of the multiple coordinate directions may be the X coordinate direction, the Y coordinate direction, and the Z coordinate direction, or may be other sequences. The movement sequence of XYZ is only an example, and the embodiment of the present application is not limited thereto.

Within the preset motion range, the preset motion step size may be determined according to the size of the irradiation fields of the collimator holes corresponding to the multiple radiation sources. The preset motion step size may be a preset fixed size determined according to the size of the irradiation field of the collimation hole, or may be adjusted according to the actual detection situation. For example, according to the preset motion step size, the maximum dose point is not found, At this time, the step size can be appropriately reduced or the step size can be reduced within the target dose range (the target dose range is the position corresponding to the dose increase and dose decrease, including the position of the maximum dose point) to find the position of the maximum dose point.

S704. Store the correspondence between the position of the preset isocenter point and the dose at the first time, and the corresponding relationship between the position of the preset maximum dose point and the dose at the first time, in the preset database.

When the position and dose of the preset isocenter point at the first time are obtained through the above S701, and the position and dose of the preset maximum dose point at the first time are obtained through the above S704, the first time and the preset dose are obtained. Set the corresponding relationship between the position of the isocenter and the dose, and the corresponding relationship between the position and the dose of the preset maximum dose point at the first time, and based on these corresponding relationships, establish a three-dimensional space position and dose relationship model, and then The relational model is stored in the preset database.

In the focus verification method provided by this embodiment, the position and dose of the preset isocenter can be obtained at the first time, and the position of the preset isocenter is used as the preset origin coordinates, and the detection device is used to detect the The dose of each position at the first time, from which the position and dose of the maximum dose point are determined, the calibration of the positions and doses of the plurality of preset points at the first time is realized, and the calibration efficiency of the positions and doses of the preset points is improved, and The calibration accuracy of the position of the preset point and the dose is also improved, and the accuracy and precision of the focus verification are effectively guaranteed.

On the basis of the focus verification method provided by the above embodiments, the embodiments of the present application can also provide a possible implementation example of a focus verification method for radiotherapy equipment, as follows based on the actual dose of the preset detection point and the theory of the preset detection point Dosages are exemplified for specific location verification. FIG. 8 is a flowchart of another focus verification method of a radiotherapy device provided by an embodiment of the present application. As shown in FIG. 8 , in S402 of the above method, the actual dose of the preset detection point and the theory of the preset detection point are used. dose, location verification of the focal points of the multiple sources may include:

S801. Compare the actual dose of the preset detection point with the theoretical dose of the set detection point.

S802. If the first dose deviation of the preset detection point is within a preset dose deviation range, perform position verification on the focus according to the position of the preset detection point.

The first dose deviation is the deviation between the actual dose at the preset detection point and the theoretical dose at the preset detection point.

During the comparison process, the deviation between the actual dose at the preset detection point and the theoretical dose at the set detection point can be calculated to obtain the first dose deviation, and then it is determined whether the first dose deviation is within the preset dose deviation range , get the comparison result.

Exemplarily, the first dose deviation is within a preset dose deviation range, including: the first dose deviation is zero, that is, the comparison results are equal, or the first dose deviation is less than or equal to the absolute dose deviation threshold value. value.

When it is determined through comparison that the first dose deviation is within the preset dose deviation range, it can be determined that the position of the preset detection point is the actual isocenter position. Therefore, the position of the preset detection point and the The position deviation of the focus is calculated from the position of the preset isocenter, and the position deviation of the focus is recorded, and a position verification report of the focus is output, and the position verification report may include: indication information corresponding to the position deviation of the focus.

In the focus verification method provided by this embodiment, when the first dose deviation of the preset detection point is within the preset dose deviation range, the position of the preset detection point can be used as the position of the actual isocenter point , that is, the position of the actual focus. In this way, the verification of the position of the focus can be realized, and the accuracy of the verification of the position of the focus can be improved.

In other implementation manners, the present application also provides an implementation example of verifying the focus position when the comparison result is that the first dose deviation is not within the dose deviation range. Optionally, in S402 in the above method, according to the actual dose of the preset detection point and the theoretical dose of the preset detection point, the position verification of the focus of the multiple radiation sources may also include:

S803. If the first dose deviation is not within the dose deviation range, acquire the dose of the surrounding points of the preset detection point detected by the detection device.

S804. Perform position verification on the focus according to the position of the target point in the surrounding points, where the target point is the point in the surrounding point where the deviation of the dose from the theoretical dose of the preset detection point is within the dose deviation range .

The fact that the first dose deviation is not within the dose deviation range means that the first dose deviation is greater than the absolute value of the preset dose deviation threshold. When it is found that the first dose deviation is not within the range of the dose deviation through comparison, the position of the detection point corresponding to the detection head of the target detector in the detection device can be adjusted by moving the treatment couch, so as to realize the preset The dose of the surrounding points of the detection point is set to be detected. The surrounding point may be a point whose distance from the detection point is within a preset distance range, for example, a point within a detection range of a preset detection radius with the preset detection point as the center.

When the dose of the surrounding point is detected, it is found that the deviation between the dose of the target point and the theoretical dose of the preset detection point in the surrounding point is within the dose deviation range, such as the dose of the target point is equal to the preset detection point. The theoretical dose, it can be determined that the target point is the actual preset point, also known as the real preset point. Then according to the position of the target point and the preset position of the preset point, determine the position of the actual isocenter, and then determine the position deviation as the focus position according to the position of the actual isocenter and the position of the preset isocenter bias to verify the location of the focus.

In the focus verification method provided by this embodiment, in the case where the first dose deviation of the preset detection point is not within the preset dose deviation range, the dose and the preset dose can be determined from the surrounding points of the preset detection point. The deviation of the theoretical dose of the detection point is within the range of the dose deviation, and then according to the position of the target point, the position verification of the focus is realized, which can improve the accuracy of the position verification of the focus.

The preset detection point shown above may be a preset maximum dose point, or a preset isocenter point. For different preset detection points, when the first dose deviation is not within the range of the dose deviation, a method corresponding to the preset detection point can be used to determine the actual isocenter point, that is, the actual focus, and then realize the detection of the focus. Location verification.

The following is an implementation manner of verifying the position of the focal point when the preset detection point is the preset maximum dose point. FIG. 9 is a flowchart of a method for performing focus position verification when the preset detection point is a preset maximum dose point according to an embodiment of the present application. As shown in FIG. 9 , if the preset detection point is the preset maximum dose point, in S804 as shown above, according to the position of the target point in the surrounding points, the position verification of the focus may include:

S901. If the second dose deviation of the target point is within the dose deviation range, determine that the target point is the actual maximum dose point.

Wherein, the second dose deviation is the deviation between the dose at the target point and the theoretical dose at the preset maximum dose point.

When it is found that the second dose deviation of the target point is within the dose deviation range, such as the dose of the target point is equal to the theoretical dose of the preset maximum dose point, it can be determined that the target point is the actual maximum dose point.

S902. According to the position of the actual maximum dose point, the position of the actual isocenter point is determined by adopting the positional relationship between the preset isocenter point and the maximum dose point.

According to the position of the actual maximum measurement point, that is, the position of the target point in the above S901, the position of the actual isocenter is calculated using the positional relationship. The positional relationship may be a three-dimensional positional relationship between the isocenter points and the maximum dose point corresponding to the multiple radiation sources, also known as a three-dimensional vector relationship.

S903. Perform position verification on the focus according to the position of the actual isocenter and the position of the preset isocenter.

In the case where the position of the actual isocenter is obtained through S902, the position deviation of the focus can be calculated according to the position of the actual isocenter and the position of the preset isocenter, and then the focus is performed according to the position deviation. Location verification.

The focus verification method provided by this embodiment provides a focus verification method in the case where the first dose deviation of the preset detection point is not within the preset dose deviation range, and the detection point is set as the preset maximum dose point, Based on the position of the actual maximum dose point, the position of the actual isocenter can be calculated, and then the position verification of the focus can be realized according to the position of the actual isocenter and the position of the preset isocenter, which can improve the accuracy of the position verification of the focus. Spend.

The following also provides an implementation manner of verifying the position of the focal point when the preset detection point is the preset isocenter point. FIG. 10 is a flowchart of a method for performing focus position verification when a preset detection point is a preset isocenter point according to an embodiment of the present application. As shown in FIG. 10 , if the preset detection point is the preset isocenter point, in S804 as shown above, according to the position of the target point in the surrounding point, the position verification of the focus may include:

S1001. If the third dose deviation of the target point is within the dose deviation range, determine the position of the target maximum dose point according to the position of the target point and the positional relationship between the preset isocenter and the maximum dose point.

Wherein, the third dose deviation is the deviation between the dose at the target point and the theoretical dose at the preset isocenter.

When it is found that the third dose deviation of the target point is within the dose deviation range, for example, the dose of the target point is equal to the theoretical dose of the preset isocenter, the target point may be a pseudo isocenter, or It is the actual isocenter point, therefore, it needs to be judged with the maximum dose point.

The positional relationship can be the three-dimensional positional relationship between the isocenter point and the maximum dose point, also known as a three-dimensional vector relationship, which can be used to indicate how from the isocenter point along the three coordinate directions of the three-dimensional coordinate system, such as the positive or negative direction of the three coordinate axes to the point of maximum dose.

Using the position of the target point, the calculated position of the target maximum dose point may be the actual maximum dose point or a non-maximum dose point. Since the actual maximum dose point is only one point, the position of the preset maximum dose point can also be used to determine whether the target maximum dose point is the actual maximum dose point.

S1002. If the position deviation of the target maximum dose point is within a preset position deviation range, determine the target point as the actual isocenter.

Wherein, the position deviation is the deviation between the position of the target maximum dose point and the position of the preset maximum dose point.

When the position of the target maximum dose is obtained by calculation, it can be compared with the position of the preset maximum dose point to obtain the position deviation. If the position deviation is within the preset position deviation range, if the target maximum dose If the position of the dose point is consistent with the position of the preset maximum dose point, it can be determined that the target maximum dose point is the actual maximum dose point. Correspondingly, the target point used to calculate the target maximum dose point is the actual isocenter. , rather than a pseudo-center point.

S1003. Perform position verification on the focus according to the position of the actual isocenter and the position of the preset isocenter.

In the case where the position of the actual isocenter is obtained through S1002, the position deviation of the focus can be calculated according to the position of the actual isocenter and the position of the preset isocenter, and then the focus is performed according to the position deviation. Location verification.

Optionally, the method may further include:

If the position deviation is not within the position deviation range, the target point is determined to be a pseudo isocenter point.

Continue to search for a target point from the surrounding points where the deviation of the dose from the theoretical dose of the preset isocenter point is within the dose deviation range, until the found target point is the actual isocenter point.

Specifically, if the position deviation is not within the position deviation range, such as the position of the target maximum dose point is inconsistent with the position of the preset maximum dose point, it can be determined that the target maximum dose point is not the actual maximum dose point, and accordingly, calculate The target point used for the target maximum dose point is the pseudo-center point, not the actual isocenter point. Once it is determined that the target point is a pseudo isocenter, it is possible to continue to determine the target point from the surrounding points where the deviation of the dose from the theoretical dose of the preset isocenter is within the range of the dose deviation, and perform the above steps S1001-1003 , until the found target point is the actual isocenter point.

For example, it is assumed that the positional relationship between the actual isocenter point A and the maximum dose point is: from the point A along the first X-axis direction A1, along the Y-axis second direction A2, along the Z-axis along the first direction Take A3 in the direction, so that the path from point A to the point of maximum dose is unique. According to the vector relationship between the pseudo isocenter point A' and the maximum dose point, the position of the target maximum dose point is determined. If the position of the target maximum dose point is different from the actual maximum dose point, it can be determined that A' is the pseudo isocenter point, Exclude it, and then continue to search until the actual position of the actual isocenter point A is found.

The focus verification method provided by this embodiment provides a focus verification method in the case that the first dose deviation of the preset detection point is not within the preset dose deviation range, and the preset detection point is a preset isocenter point , which can be matched with the position of the preset maximum dose point to determine whether the target point is a pseudo isocenter point or an actual isocenter point. The position of the point is used to realize the verification of the position of the focus, which can improve the accuracy of the verification of the position of the focus.

It should be noted that, in other implementations of focus verification of radiotherapy equipment, the above detection device can also be used to determine the point position, that is, the position of the target detector is not determined, and there is no need to perform targeted data collection on the detection device. verify. For example, within the preset motion range of the detection device, a point can be randomly selected, the actual dose of the randomly selected point can be obtained, and then the actual dose of the randomly selected point within the preset motion range can be generated to generate the preset The dose description curve corresponding to the motion range is then compared with the preset dose distribution curve to verify the dose accuracy deviation and position deviation of each point within the preset motion range.

The method of randomly selecting points and verifying by means of a dose description curve is relatively simple to implement and has low cost, but the verification efficiency is low.

In another implementation manner of the focus verification of the radiotherapy equipment, the specificity of the three-dimensional isodose distribution curve at the focus can be used. The position of the detector, that is, the target detector, is used as the reference position, and within the range of the dose area with a preset percentage such as more than 20%, the dose is collected according to the preset lattice, and according to the dose collected during the movement of each detector in the lattice, A dose model of the plurality of detectors is established, and the dose model is stored in a preset database. In the implementation process, within the dose area, randomly select a point, use the dose model to read the dose of the randomly selected point, and then perform verification in combination with the dose of the randomly selected point. For example, the randomly selected point may be the point of the preset detection point, then using the dose model, the theoretical dose of the preset detection point can be read; for another example, the randomly selected point may be other The position of the detection point, then the theoretical dose or planned dose of the other detection point can be read by using the dose model.

The focus can be, for example, a ray focus irradiated by a collimating hole of a preset size, such as a Φ18mm collimating hole. Correspondingly, the preset lattice size can be, for example, a crystal whose three coordinate directions in the three-dimensional coordinate system are all preset distances. grid, such as 0.5mm×0.5mm×0.5mm.

By adopting this additional implementation manner, the focus verification can be realized more efficiently and effectively, and the verification of the radiotherapy plan can also be combined with the verification of the following radiotherapy plan verification, so as to realize the compatible verification of the radiotherapy plan.

For the radiotherapy verification system provided with the detection device shown above, the embodiment of the present application may further provide a radiotherapy plan verification method. FIG. 11 is a flowchart of a method for verifying a radiotherapy plan provided by an embodiment of the present application. The method for verifying the radiotherapy plan can be implemented by a host computer that is communicatively connected to the detection device in the radiotherapy verification system. By executing the radiotherapy plan verification method, the dose of the target in the radiotherapy plan can be verified, so as to ensure that the patient receives the dose of the target in the treatment plan. The dose detected by the detection device involved in the radiotherapy plan verification method may be the dose detected by a target detector in at least one detector of the detection device, and the target detector may be a detector shown in FIG. The detector in the middle of the three detectors in 3, or, set in other forms. In any case, it is necessary to ensure that the probe of the target detector faces the detector in the focus direction of the multiple radiation sources.

As shown in Figure 11, the method may include:

S1101. Acquire the actual dose of the target point corresponding to the focus of the multiple radiation sources detected by the detection device, where the target point is a target point in the radiotherapy plan.

The actual dose of the target point detected by the detection device can be detected by the target detector in the detection device, that is, the probe of the target detection device is directed to the focus direction of the multiple radiation sources, and the focus and the target target point are made. In the case of alignment, the detected dose.

The target can be any target in the radiotherapy plan. The radiotherapy plan, that is, in the radiotherapy plan, the position of each target is fixed. Therefore, during the application process, the position of the target can be obtained from the radiotherapy plan, and the treatment couch can be controlled to move towards the radiation source device. When the treatment couch is input to the radiation source device, by adjusting the position of the treatment couch, the probe of the target detector is located at the position of the target target point, and the probe of the target detector faces the direction of the focus, so that the probe of the target detector can be realized. Align with the position of the target target. Thus, in this case, the obtained dose detected by the target detector is the actual dose of the target.

S1102. Verify the radiotherapy plan according to the actual dose of the target and the planned dose of the target in the radiotherapy plan.

In addition to the location of each target, the radiotherapy plan also has the planned dose for each target. In this way, the planned dose of the target can also be obtained from the radiotherapy plan, and the radiotherapy plan can be verified according to the actual dose of the target and the planned dose of the target.

The radiation therapy plan verification method provided in the embodiment of the present application can use the actual dose of the target point corresponding to the focus detected by the detection device and the theoretical dose of the target point in the radiation therapy plan to verify the radiation therapy plan. As long as the probe of the detection device is sent to the position of the target, the actual dose of the target can be obtained, and then the dose of the target can be verified by comparison, so as to realize the verification of the radiotherapy plan. There is no need for the user to perform too many operations, which effectively simplifies the operation flow of the radiotherapy plan verification process, and reduces the required software and hardware configuration, thereby improving the operator's enthusiasm for operation. Compared with the method of pressing the needle and developing the film, it effectively improves the Validation efficiency of radiotherapy plans.

Optionally, on the basis of the radiotherapy plan verification method provided in the foregoing FIG. 11 , the embodiment of the present application further provides a possible implementation manner of the radiotherapy plan verification method. FIG. 12 is a flowchart of another method for verifying a radiotherapy plan provided by an embodiment of the present application. As shown in FIG. 12 , in S1102 shown above, the radiotherapy plan is verified according to the actual dose of the target and the planned dose of the target in the radiotherapy plan, which may include:

S1201. Determine the dose verification result of the target point according to the actual dose of the target point and the planned dose of the target point.

Optionally, the dose deviation of the target can be calculated according to the actual dose of the target and the planned dose of the target, and then the dose verification result of the target can be determined according to the dose deviation of the target. .

For example, the dose deviation of the target can be recorded to obtain a dose verification result of the target, and the dose verification result of the target can include: indication information corresponding to the dose deviation of the target.

Optionally, the dose deviation of the target can also be compared with a preset dose deviation threshold. If the dose deviation of the target is less than or equal to the absolute value of the preset dose deviation threshold, it can be determined. The dose verification of the target in the radiotherapy plan is passed; on the contrary, if the dose deviation of the target is greater than the absolute value of the preset dose deviation threshold, it can be determined that the dose verification of the target in the radiotherapy plan fails. . The dose verification result of the target point may further include: indication information of whether the target point has passed the verification.

S1202 , verifying the radiotherapy plan according to the dose verification result of the target.

Optionally, the radiotherapy plan may be verified in a corresponding manner according to the dose verification result of the target and the target area targeted by the radiotherapy plan.

In a possible implementation, if the target volume targeted by the radiotherapy plan is small, such as the area of the target volume is less than or equal to a preset area threshold, if the dose verification of the target point passes, the radiotherapy can be determined If the verification of the plan is passed, if the verification of the dose of the target target fails, it can be determined that the verification of the radiotherapy plan fails.

Or, in other embodiments, the target point may be the center point of the target area in the radiotherapy plan, or may refer to the target point of the target area, then through the verification of the target point, the target point can be realized. Validation of radiotherapy plans.

In another possible implementation, if the target volume targeted by the radiotherapy plan is large, if the area of the target volume is larger than the preset area threshold, the dose verification of the target target is passed, and other targets in the radiotherapy plan need to be verified. or the doses of other targets in the radiotherapy plan are verified, or, combined with the dose distribution of the targets in the radiotherapy plan, the doses of other detection points other than the target are verified, so that the Further dose verification in the radiotherapy plan; if the dose verification of the target target fails, it can be determined that the verification of the radiotherapy plan fails.

The radiotherapy plan verification method provided in this embodiment can firstly be based on the target verification result of the target target, and the verification of the radiotherapy plan can make the verification of the target target more accurate, thereby ensuring that the verification of the radiotherapy plan is more targeted improve the reliability of the validation of radiotherapy plans.

Optionally, on the basis of the method shown in FIG. 12 above, the embodiment of the present application may further provide an example implementation manner of radiotherapy plan verification. If the target volume targeted by the radiotherapy plan is relatively large, the radiotherapy plan includes at least two targets. FIG. 13 is a flowchart of another radiotherapy plan verification method provided by the embodiment of the present application. As shown in Figure 13, the method may further include:

S1301. Acquire a target dose of another target in the at least two targets, where the other target is a target other than the target in the at least two targets.

In an example possible implementation, the actual dose of the target can be detected, and the detected actual dose can be used as the target dose. For example, in an implementation manner, the actual dose of the other target point corresponding to the focus detected by the detection device may be obtained as the target dose of the other target point. In this implementation manner, the detection device can continue to be used to detect the doses of the other targets to obtain the actual doses of the other targets. In another implementation manner, other detection methods, such as film detection methods, may be used to detect the actual dose of the other targets.

If the detection device is used to detect the actual dose of the other target, the position of the other target can be obtained from the radiotherapy plan, and by adjusting the position of the treatment couch, the probe of the target detector in the detection device is located at the position of the other target , and the probe of the target detector faces the direction of the focus, so that the probe of the target detector is aligned with other target points. Thus, in this case, the obtained dose detected by the target detector is the actual dose of the other target.

S1302. Determine the dose verification result of the other target according to the target dose of the other target and the planned dose of the other target in the radiotherapy plan.

Optionally, the planned dose of the other target can be obtained from the radiotherapy plan, and the dose deviation of the other target can be calculated according to the target dose of the other target and the planned dose of the other target, and then according to the other target. dose deviation, determine the dose validation results of this other target.

For example, the dose deviation of the other target can be recorded to obtain the dose verification result of the other target, and the dose verification result of the other target can include: indication information corresponding to the dose deviation of the other target.

Optionally, the dose deviation of the other target can also be compared with a preset dose deviation threshold. If the dose deviation of the other target is less than or equal to the absolute value of the preset dose deviation threshold, it can be determined. The dose verification of the other target in the radiotherapy plan is passed; on the contrary, if the dose deviation of the other target is greater than the absolute value of the preset dose deviation threshold, it can be determined that the dose verification of the other target in the radiotherapy plan fails. . The dose verification result of the other target may further include: indication information of whether the other target has passed the verification.

Optionally, the radiotherapy plan is verified according to the dose verification result of the target in S1202 as shown above, which may include:

S1303 , if the dose verification results of the target target and the other targets are all passed, it is determined that the radiotherapy plan is verified to pass.

In the case of obtaining the dose verification results of the target target and the other targets, it is judged whether the dose verification results of the target target and the other targets have passed, only if the dose verification results of the target target and the other targets are The radiotherapy plan can be determined to have passed the verification only when all the verification results are passed; as long as one of the verification fails, it can be determined that the radiotherapy plan has failed the verification.

It should be noted that the other target may be one or more.

The radiotherapy plan verification method provided in this embodiment can verify the target target and obtain the dose verification result of the target target, and also verify the other target to obtain the dose verification result of the other target. In this way, according to the verification results of the dose verification results of the target target and the other targets, the verification results of the radiotherapy plan can be determined, and the dose verification of multiple targets in the radiotherapy plan can be realized, thereby improving the verification accuracy of the radiotherapy plan. At the same time, it can meet the dose verification of larger target volume, and its radiotherapy plan targets a larger target volume and is more applicable.

Optionally, on the basis of the radiotherapy plan verification method provided in the foregoing FIG. 11 , the embodiment of the present application further provides a possible implementation manner of the radiotherapy plan verification method. FIG. 14 is a flowchart of still another radiotherapy plan verification method provided by the embodiment of the application. As shown in FIG. 14 , the method may further include:

S1401. Acquire the actual dose of other detection points detected by the detection device other than the focal point, and the other detection points have a preset positional relationship with the focal point.

Exemplarily, the actual dose of the target point may be the actual dose detected when the probe of the target detector in the detection device faces the focal point and is aimed at the target point, then when the detection device is set When there are multiple detectors, the detection positions corresponding to other detectors other than the target detector are the other detection points, and the actual dose detected by the other detectors is the actual dose of the other detection points.

Since the probe of the target detector faces the focal point, and the relative positions of the plurality of detectors in the detection device are fixed, the preset positional relationship between the other detection points and the focal point can be the same as that of the plurality of detectors. The relative positional relationship between other detectors and the target detector.

S1402. Determine the dose verification result of the other detection point according to the actual dose of the other detection point and the planned dose of the other detection point.

Optionally, the dose deviation of the other detection point can be calculated according to the actual dose of the other detection point and the planned dose of the other detection point, and then the dose verification result of the other detection point can be determined according to the dose deviation of the other detection point. .

For example, the dose deviation of the other detection point may be recorded to obtain the dose verification result of the other detection point, and the dose verification result of the other detection point may include: indication information corresponding to the dose deviation of the other detection point.

Optionally, the dose deviation of the other detection points can also be compared with a preset dose deviation threshold, and if the dose deviation of the other detection points is less than or equal to the absolute value of the preset dose deviation threshold, it can be determined. The dose verification of the other detection points is passed; on the contrary, if the dose deviation of the other detection points is greater than the absolute value of the preset dose deviation threshold, it can be determined that the dose verification of the other detection points is not passed. The dose verification result of the other detection point may further include: indication information of whether the verification of the other detection point is passed.

Wherein, the planned dose of the other detection point is calculated, for example, by using the dose distribution of the radiotherapy plan.

As shown above in S1102, the radiotherapy plan is verified according to the actual dose of the target and the planned dose of the target in the radiotherapy plan, which may include:

S1403 , if the dose verification results of the target point and the other detection points are all passed, it is determined that the radiotherapy plan is verified to pass.

The dose verification results of the target point and the other detection points are all passed, and it can be determined that the dose distribution verification of the radiotherapy plan has passed, and the verification of the target target in the radiotherapy plan has also passed, so it can be determined that the radiotherapy plan has passed the verification. That is to say, in the verification process of the radiotherapy plan, not only the dose of the target in the radiotherapy plan can be verified in a targeted manner, but also the verification of the dose distribution of the radiotherapy plan can be realized, and the accurate verification of the radiotherapy plan can be realized.

Optionally, before determining the dose verification result of the other detection point according to the actual dose of the other detection point and the planned dose of the other detection point in the above S1402, the method may further include:

S1402A. Obtain the dose distribution formed by the target in the radiotherapy plan.

The radiotherapy plan may have the positions of multiple targets and the planned doses of the multiple targets. Thus, the positions and planned doses of the multiple targets can be obtained from the radiotherapy plan. According to the positions of the multiple targets and the planned doses For the planned doses of the multiple target points, the dose distribution formed by the target points is generated, that is, the dose field distribution of the planned doses of the target points. The dose distribution can be used to characterize the correspondence between the target location and the dose in the radiotherapy plan.

S1402B, according to the dose distribution and the planned dose of the target point corresponding to the focal point, determine the planned dose of the other detection point that has the preset positional relationship with the focal point.

For example, the dose at the position of the other detection point in the dose distribution can be calculated according to the position of the target point and the preset positional relationship, that is, the planned dose of the other detection point.

In this embodiment, the dose distribution formed by the target point in the radiotherapy plan can be provided, and the dose in the dose distribution of the other detection point that has a preset positional relationship with the focus is calculated as the planned dose of the other detection point, so as to realize The verification of the dose distribution in the radiotherapy plan improves the verification accuracy of the radiotherapy plan.

The following describes the focus verification device, equipment, and storage medium of the radiotherapy equipment provided by the present application. The specific implementation process and technical effect thereof are referred to above, and will not be repeated below.

FIG. 15 is a schematic diagram of a focus verification apparatus of a radiotherapy apparatus provided by an embodiment of the present application. As shown in FIG. 15 , the focus verification apparatus 1500 of the radiotherapy apparatus may include:

The first acquisition module 1501 is configured to acquire the actual dose of a preset detection point detected by the detection device, where the preset detection point is the focus of the multiple radiation sources or a detection point that has a preset positional relationship with the focus.

The position verification module 1502 is configured to perform position verification of the focal points of the multiple radiation sources according to the actual dose of the preset detection point and the theoretical dose of the preset detection point.

Optionally, the actual dose is the dose of the preset detection point detected by the second time detection device, and the theoretical dose of the preset detection point is the theoretical dose of the preset detection point at the second time;

The position verification module 1502 is further configured to preset the dose and interval length of the detection point according to the first time before performing position verification on the focal points of the multiple radiation sources according to the actual dose of the preset detection point and the theoretical dose of the preset detection point. and a preset ray attenuation function to calculate the theoretical dose of the preset detection point at the second time, and the interval duration is the duration between the first time and the time before the second time.

Optionally, the position verification module 1502 is specifically configured to obtain the dose of the preset detection point at the first time from the preset database according to the position of the preset detection point, wherein the preset database stores: at least one at the first time. The corresponding relationship between the position of the preset point and the dose.

Optionally, if the preset database stores: the correspondence between the positions of the multiple preset points at the first time and the dose.

The position verification module 1502 is specifically used to obtain the position and dose of a preset point at the first time by using a preset dose detection method before obtaining the dose at the preset point at the first time from the preset database; The position and dose at the set point, using the preset linear relationship between the preset positions and the dose, to calculate the positions and doses of other preset points in the multiple preset points at the first time; The correspondence between the positions of the multiple preset points and the dose is stored in the preset database.

Optionally, if the preset database stores: the correspondence between the positions of the multiple preset points at the first time and the dose. The multiple preset points include: preset isocenter point and preset maximum dose point.

The position verification module 1502 is specifically used for obtaining the position and dose of the first time preset isocenter by using a preset dose detection method before obtaining the dose at the first time preset point from the preset database; Taking the position of the preset isocenter as the origin position, the dose of each position at the first time detected in the process of moving with the preset motion step; according to the dose of each position, the position with the largest dose is determined from each position as Preset the position of the maximum dose point; store the corresponding relationship between the position of the isocenter point and the dose at the first time preset, and the corresponding relationship between the position and the dose of the preset maximum dose point at the first time, in the preset database.

Optionally, the position verification module 1502 is specifically used to compare the actual dose of the preset detection point with the theoretical dose of the preset detection point; if the first dose deviation of the preset detection point is within the preset dose deviation range, then The position of the focus is verified according to the position of the preset detection point, wherein the first dose deviation is the deviation between the actual dose of the preset detection point and the theoretical dose of the preset detection point.

Optionally, the position verification module 1502 is further configured to obtain the dose of the surrounding points of the preset detection point detected by the detection device if the first dose deviation is not within the dose deviation range; Perform position verification, wherein the target point is a point in the surrounding points where the deviation of the dose from the theoretical dose of the preset detection point is within the dose deviation range.

Optionally, if the preset detection point is the preset maximum dose point; the verification module 1502 is specifically configured to determine that the target point is the actual maximum dose point if the second dose deviation of the target point is within the dose deviation range, wherein the first The second dose deviation is the deviation between the dose at the target point and the theoretical dose at the preset maximum dose point; according to the position of the actual maximum dose point, the positional relationship between the preset isocenter point and the maximum dose point is used to determine the actual isocenter point. ;According to the position of the actual isocenter and the position of the preset isocenter, the position of the focus is verified.

Optionally, if the preset detection point is the preset isocenter point, the position verification module 1502 is specifically used for, if the third dose deviation of the target point is within the dose deviation range, according to the position of the target point, and the preset The positional relationship between the center point and the maximum dose point determines the position of the target maximum dose point, where the third dose deviation is the deviation between the dose at the target point and the theoretical dose at the preset isocenter; if the position deviation of the target maximum dose point is within Within the preset position deviation range, the target point is determined to be the actual isocenter point, wherein the position deviation is the deviation between the position of the target maximum dose point and the position of the preset maximum dose point; according to the position of the actual isocenter point and the preset position The position of the isocenter point, and the position of the focus is verified.

Optionally, the position verification module 1502 is further configured to determine that the target point is a pseudo isocenter if the position deviation is not within the range of the position deviation; continue to search for the deviation between the dose and the theoretical dose of the preset isocenter from the surrounding points. The target point within the range of dose deviation, until the found target point is the actual isocenter.

The above-mentioned apparatus is used to execute the focus verification method provided in the foregoing embodiment, and the implementation principle and technical effect thereof are similar, which will not be repeated here.

The radiotherapy plan verification device and storage medium provided by the present application for execution are described below, and the specific implementation process and technical effect thereof are referred to above, and will not be repeated below.

FIG. 16 is a schematic diagram of a radiotherapy plan verification apparatus provided by an embodiment of the present application. As shown in FIG. 16 , the radiotherapy plan verification apparatus 1600 may include:

The second acquisition module 1601 is configured to acquire the actual dose of the target point corresponding to the focal points of the multiple radiation sources detected by the detection device, where the target point is a target point in the radiotherapy plan.

The plan verification module 1602 verifies the radiotherapy plan according to the actual dose of the target and the planned dose of the target in the treatment plan.

Optionally, the plan verification module 1602 is specifically configured to verify the radiotherapy plan according to the dose verification result of the target.

Optionally, if the radiotherapy plan includes at least two targets, the second obtaining module 1601 is further configured to obtain target doses of other targets among the at least two targets, and the other targets are the target targets among the at least two targets. outside the target;

The plan verification module 1602 is specifically used to determine the dose verification results of other targets according to the target doses of other targets and the planned doses of other targets in the radiotherapy plan; if the dose verification results of the target target and other targets pass, It is determined that the radiotherapy plan has passed the verification.

Optionally, the second acquisition module 1601 is specifically configured to acquire the actual dose of other target points corresponding to the focal point detected by the detection device as the target dose of the other target points.

Optionally, the second acquisition module 1601 is further configured to acquire the actual dose of other detection points other than the focal point detected by the detection device, and the other detection points and the focal point have a preset positional relationship;

The plan verification module 1602 is specifically used to determine the dose verification results of other detection points according to the actual doses of other detection points and the planned doses of other detection points; Plan validation passed.

Optionally, the second acquisition module 1601 is further configured to acquire the dose distribution formed by the target point in the treatment plan; according to the dose distribution and the planned dose of the target point corresponding to the focus point, determine the dose distribution with a preset positional relationship with the focus point. Planned doses at other detection points.

The above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more specific integrated circuits (Application Specific Integrated Circuit, ASIC for short), or one or more microprocessors (digital singnal) processor, referred to as DSP), or, one or more Field Programmable Gate Array (Field Programmable Gate Array, referred to as FPGA) and the like. For another example, when one of the above modules is implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a central processing unit (Central Processing Unit, CPU for short) or other processors that can call program codes. For another example, these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC for short).

17 is a schematic diagram of a verification device provided by an embodiment of the application, the verification device may be integrated into a host computer that is communicatively connected to the detection device, and the specific product form of the host computer may be a computing device or a server with computing processing functions .

The verification apparatus 1700 includes: a memory 1701 and a processor 1702 . The memory 1701 and the processor 1702 are connected by a bus.

The memory 1701 is used to store programs, and the processor 1702 calls the programs stored in the memory 1701 to execute the above method embodiments. The specific implementation manner and technical effect are similar, and details are not repeated here.

Optionally, the present invention also provides a program product, such as a computer-readable storage medium, which may be a non-volatile storage medium, on which a computer program is stored, and when executed by a processor, the computer program is used to execute the above-mentioned Method Examples.

In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to execute the various embodiments of the present invention. part of the method. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (English: Read-Only Memory, referred to as: ROM), random access memory (English: Random Access Memory, referred to as: RAM), magnetic disk or optical disk, etc. Various media that can store program code.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art who is familiar with the technical scope disclosed in the present application can easily think of changes or replacements, which should be covered within the scope of the present application. within the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Industrial Applicability

The focus verification method, plan verification method, system, device, and storage medium provided by the embodiments of the present application can use the actual dose of the preset detection point detected by the detection device and the theoretical dose of the preset detection point to determine the multiple radiation sources. The focus position is verified. In the process of focus verification, as long as the detection probe of its detection device is sent to the preset detection point, the actual dose of the preset detection point can be obtained, and then the focus position is verified by comparison. There is no need for the user to perform too many operations, which effectively simplifies the operation process of the focus verification process, reduces the required software and hardware configuration, and improves the operator's enthusiasm for operation. Compared with the way of pressing the needle and developing the film, it effectively improves the verification efficiency.

Claims (19)

A focus verification method for radiotherapy equipment, characterized in that the focus verification method comprises: acquiring the actual dose of a preset detection point detected by the detection device, where the preset detection point is the focus of multiple radiation sources or a detection point that has a preset positional relationship with the focus; According to the actual dose of the preset detection point and the theoretical dose of the preset detection point, the position verification of the focal points of the plurality of radiation sources is performed. The method according to claim 1, wherein the actual dose is the dose at the preset detection point detected by the detection device at the second time, and the theoretical dose at the preset detection point is the second dose The theoretical dose of the preset detection point at the time; Before performing position verification on the focal points of the plurality of radiation sources according to the actual dose of the preset detection point and the theoretical dose of the preset detection point, the method further includes: Calculate the theoretical dose of the preset detection point at the second time according to the dose of the preset detection point at the first time, the interval duration and the preset ray attenuation function, and the interval duration is the first time and the the length of time before the second time. The method according to claim 2, wherein the preset detection point at the second time is calculated according to the dose, the interval time and the preset ray attenuation function of the preset detection point at the first time Before the theoretical dose, the method further comprises: According to the position of the preset detection point, the dose of the preset detection point at the first time is obtained from a preset database, wherein the preset database stores: at least one preset at the first time The correspondence between the position of the point and the dose. The method according to claim 3, wherein, if the preset database stores: the correspondence between the positions of the multiple preset points at the first time and the dose; Before the dose at the preset point at the first time, the method further includes: Using a preset dose detection method to obtain the position and dose of a preset point at the first time; According to the position and dose at the one preset point, using the preset linear relationship between the preset positions and the dose, calculate the other preset points among the multiple preset points at the first time location and dose; The correspondence between the positions of the multiple preset points and the dose at the first time is stored in the preset database. The method according to claim 3, wherein if the preset database stores: the correspondence between the positions of multiple preset points at the first time and the dose, the multiple preset points include: preset an isocenter point and a preset maximum dose point; before acquiring the dose at the preset point at the first time from the preset database, the method further includes: Obtain the position and dose of the preset isocenter point at the first time by using a preset dose detection method; Acquiring the doses of each position at the first time detected by the detection device in the process of moving with the preset isocenter position as the origin position and using the preset motion step; According to the doses at the respective positions, determining the position with the maximum dose from the respective positions as the position of the preset maximum dose point; Store the corresponding relationship between the position of the preset isocenter point and the dose at the first time, and the corresponding relationship between the position and the dose of the preset maximum dose point at the first time, in the preset database. . The method according to any one of claims 1-5, characterized in that, according to the actual dose of the preset detection point and the theoretical dose of the preset detection point, to the multiple radiation sources Focus for location verification, including: comparing the actual dose at the preset detection point with the theoretical dose at the preset detection point; If the first dose deviation of the preset detection point is within the preset dose deviation range, the position verification of the focus is performed according to the position of the preset detection point, wherein the first dose deviation is the The deviation between the actual dose at the preset detection point and the theoretical dose at the preset detection point. The method according to claim 6, characterized in that, according to the actual dose of the preset detection point and the theoretical dose of the preset detection point, the position verification of the focal points of the plurality of radiation sources is performed, Also includes: If the first dose deviation is not within the dose deviation range, acquiring the dose of the surrounding points of the preset detection point detected by the detection device; Perform position verification on the focal point according to the position of the target point in the surrounding points, wherein the target point is the surrounding point, and the deviation of the dose from the theoretical dose of the preset detection point is within the dose deviation points within the range. The method according to claim 7, wherein, if the preset detection point is a preset maximum dose point; the performing position verification on the focal point according to the position of the target point in the surrounding points, comprising: If the second dose deviation of the target point is within the dose deviation range, the target point is determined as the actual maximum dose point, wherein the second dose deviation is the difference between the dose of the target point and the preset dose Deviation of the theoretical dose at the maximum dose point; According to the position of the actual maximum dose point, the position of the actual isocenter point is determined by adopting the positional relationship between the preset isocenter point and the maximum dose point; Position verification is performed on the focus according to the position of the actual isocenter and the position of the preset isocenter. The method according to claim 7, wherein, if the preset detection point is a preset isocenter point, performing position verification on the focus according to the position of the target point in the surrounding points, comprising: If the third dose deviation of the target point is within the dose deviation range, the position of the target maximum dose point is determined according to the position of the target point and the positional relationship between the preset isocenter and the maximum dose point, Wherein, the third dose deviation is the deviation between the dose at the target point and the theoretical dose at the preset isocenter; If the position deviation of the target maximum dose point is within a preset position deviation range, the target point is determined to be the actual isocenter, wherein the position deviation is the position of the target maximum dose point and the preset maximum dose point. deviation of the position of the dose point; Position verification is performed on the focus according to the position of the actual isocenter and the position of the preset isocenter. The method according to claim 9, wherein the method further comprises: If the position deviation is not within the position deviation range, determining that the target point is a pseudo isocenter; Continue to search for a target point from the surrounding points where the deviation of the dose from the theoretical dose of the preset isocenter point is within the dose deviation range, until the found target point is the actual isocenter point. A radiotherapy plan verification method, characterized in that the radiotherapy plan verification method comprises: acquiring the actual dose of the target point corresponding to the focal points of the multiple radioactive sources detected by the detection device, where the target point is a target point in the radiotherapy plan; The radiotherapy plan is verified according to the actual dose of the target and the planned dose of the target in the treatment plan. The method according to claim 11, wherein the verification of the radiotherapy plan according to the actual dose of the target point and the planned dose of the target point in the treatment plan comprises: Determine the dose verification result of the target point according to the actual dose of the target point and the planned dose of the target point; The radiotherapy plan is verified according to the dose verification result of the target. The method of claim 12, wherein if the radiotherapy plan includes at least two targets, the method further comprises: obtaining target doses of other targets in the at least two targets, and the other targets are targets other than the target targets in the at least two targets; Determine the dose verification result of the other target according to the target dose of the other target and the planned dose of the other target in the radiotherapy plan; The verification of the radiotherapy plan according to the dose verification result of the target, includes: If the dose verification results of the target target and the other targets are all passed, it is determined that the radiotherapy plan is verified to pass. The method according to claim 13, wherein the obtaining the target doses of the other targets in the at least two targets comprises: The actual dose of the other target points corresponding to the focus detected by the detection device is acquired as the target dose of the other target points. The method of claim 12, wherein the method further comprises: acquiring the actual dose of other detection points detected by the detection device other than the focal point, and the other detection points have a preset positional relationship with the focal point; Determine the dose verification result of the other detection points according to the actual dose of the other detection points and the planned dose of the other detection points; The verification of the radiotherapy plan according to the dose verification result of the target, includes: If the dose verification results of the target point and the other detection points are all passed, it is determined that the radiotherapy plan is verified to pass. The method according to claim 15, wherein before determining the dose verification result of the other detection points according to the actual dose of the other detection points and the planned dose of the other detection points, the method comprises: : obtaining the dose distribution formed by the target in the treatment plan; According to the dose distribution and the planned dose of the target point corresponding to the focal point, the planned dose of the other detection points having the preset positional relationship with the focal point is determined. A radiotherapy verification system, comprising: radiotherapy equipment, a detection device, and a processor; wherein, the radiotherapy equipment includes: a plurality of radiation sources, the rays of the plurality of radiation sources are focused on a preset focus, the A detection device is arranged on the treatment couch of the radiotherapy equipment, and is used to detect the actual dose at a preset detection point, and the processor is connected to the detection device for executing the method according to any one of claims 1-16 . A verification device, comprising: a memory and a processor, wherein the memory stores a computer program executable by the processor, and when the processor executes the computer program, any one of the above claims 1-16 is implemented method described in item. A non-volatile storage medium, characterized in that, a computer program is stored on the storage medium, and when the computer program is read and executed, the method according to any one of the preceding claims 1-16 is implemented.

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