CN109847198B - Accelerator adjusting device - Google Patents
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- CN109847198B CN109847198B CN201811646062.4A CN201811646062A CN109847198B CN 109847198 B CN109847198 B CN 109847198B CN 201811646062 A CN201811646062 A CN 201811646062A CN 109847198 B CN109847198 B CN 109847198B
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Abstract
The invention provides an accelerator adjusting device which comprises a machine head bearing frame, a machine head lifting adjusting device and a deflection bracket, wherein the accelerator adjusting device can respectively adjust the height, the left and the right deflection displacement of the machine head, solves the problem that a tumor is not concentric with the whole rotation treatment center of the device due to the structural limitation of image radiography equipment, and can deflect a radioactive source to avoid irradiating normal human tissues when the tumor is shielded by the normal human tissues, shortens the radiotherapy time of a patient and increases the radiotherapy effect. The accelerator adjusting device is used for radiotherapy equipment guided by image radiography equipment and is used for solving the problem that the existing product can only carry out single-dimensional radiotherapy.
Description
Technical Field
The invention relates to the technical field of radiotherapy equipment guided by image radiography equipment, in particular to an accelerator adjusting device.
Background
Malignant tumors are one of the major threats facing current human health and present a yearly rising trend. Radiotherapy achieves treatment of tumors by irradiation with high-energy radiation. Because high-energy rays can kill tumor cells and damage normal tissue cells, accuracy is a key factor of radiotherapy technology.
In the current research work of radiotherapy systems carried out at home and abroad, a radioactive source machine head can only rotate around a sickbed to carry out single-dimensional radiotherapy on tumor parts of patients. For example, MRIdian of ViewRay in the united states of america uses a rotating gantry to mount three Co60 remote treatment heads to effect tumor localization and treatment. The university of Canadian Alberta CCI (Cross Cancer Institute) couples the magnetic resonance imaging system and the linear accelerator together through a portal ring, and the rotation of the portal drives the rotation radiation of the radiation system, but the radiation source machine head can only rotate around a sickbed and cannot do multi-angle and multi-plane radiation therapy.
When the accelerator radioactive element handpiece is used for carrying out single-dimensional radiotherapy around a tumor of a patient, if normal human tissues shield the tumor, the normal tissues of the human body can be damaged. In order to avoid the damage of the normal tissue which shields the tumor, the positioning irradiation treatment in different directions is needed, or the radioactive source is turned off when the normal tissue which shields the tumor is irradiated, and the radioactive source is turned on when the normal tissue is bypassed. The operation not only increases the time and the positioning difficulty of the radiotherapy of the patient, but also can lead to the deviation of the tumor center point and the system center point due to the limited moving distance of the treatment bed, can not ensure the consistency of the radiotherapy dosage of each part, and can also lead to insufficient irradiation metering of the tumor radiotherapy shielded by normal human tissues, thereby not achieving the effective treatment effect.
Disclosure of Invention
In view of the above, the present invention provides an accelerator head adjusting device, which aims to solve the existing problems.
The invention provides an accelerator adjusting device which is used for a radiotherapy device guided by a radiography imaging device, wherein the machine head adjusting device comprises a machine head bearing frame, a machine head lifting adjusting device and a deflection bracket, the machine head bearing frame is provided with an accelerator machine head and a machine head deflection driving positioning device, and the machine head deflection driving positioning device can drive the accelerator machine head to do rotary deflection motion around a shaft and can measure and feed back deflection positions; the machine head lifting adjusting device is positioned between the machine head bearing frame and the deflection bracket and can be used for adjusting the height of the machine head bearing frame in an up-and-down telescopic manner; the deflection bracket is a gantry bracket and is provided with a deflection bracket rotating shaft, and a deflection driving device is arranged on the deflection bracket and can drive the deflection bracket to deflect around the deflection bracket rotating shaft so as to drive the accelerator machine head to deflect around the deflection bracket rotating shaft; the accelerator machine head adjusting device is directly connected with two sides of the contrast imaging device in a bridging mode through the deflection support, or is arranged on the outer side of the contrast imaging device through a connecting piece.
Furthermore, the two sides of the deflection bracket are respectively provided with a centering device.
Further, the aligning device includes: the eccentric shaft is connected with the eccentric shaft locking nut; the eccentric shaft passes through the deflection bracket to be connected with the roller bearing, and is locked by the eccentric shaft locking nut.
Further, the deflection bracket is also provided with a position detection device.
Further, the position detecting device is a rotary encoder or a grating ruler.
Further, the machine head lifting adjusting device is composed of a plurality of lifting rods, and the lifting rods are screw lifting rods.
The lifter includes: the lifting column is sleeved with the lifting seat through a sliding guide sleeve, a motor is fixed at the bottom of the lifting seat, the motor is connected with a ball screw through a coupling, a ball screw nut is sleeved on the ball screw, a ball screw nut seat is sleeved outside the ball screw nut, and the ball screw nut seat is fixed on the inner wall of the lifting column.
Further, the machine head lifting adjusting device is composed of four lifting rods.
Further, the accelerator adjusting device further comprises a balancing weight, and the balancing weight is located below the deflection bracket.
Further, the balancing weight is a metal balancing weight.
According to the accelerator adjusting device provided by the invention, the head deflection driving positioning device, the head lifting adjusting device and the deflection bracket are matched, so that the head can be adjusted in vertical height and left-right deflection displacement, the problem of non-concentricity between a tumor and the whole rotation treatment center of the device, which is caused by the structural limitation of image radiography equipment, is solved, namely the isocenter problem of radiation treatment irradiation is solved, simultaneously, the multi-dimensional continuous rotation irradiation treatment of an accelerator radioactive source on the tumor is realized, and when normal human tissues shield the tumor, the radioactive source deflection can be carried out to avoid irradiation on the normal human tissues, the radiation treatment time of a patient is shortened, and the radiation treatment effect is improved. The accelerator adjusting device is used for radiotherapy equipment guided by image radiography equipment and is used for solving the problem that the existing product can only carry out single-dimensional radiotherapy.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic diagram of an accelerator adjusting device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a nose adjusting device of an accelerator adjusting device according to an embodiment of the present invention;
FIG. 3A is a schematic diagram of a centering device of an accelerator adjusting device according to an embodiment of the invention;
FIG. 3B is a schematic diagram of a centering device of an accelerator adjusting device according to an embodiment of the invention;
FIG. 4A is a schematic diagram showing a configuration relationship between an accelerator adjusting device and an image contrast device according to an embodiment of the present invention;
FIG. 4B is a second schematic diagram of a configuration relationship between an accelerator adjusting device and an image contrast device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an image contrast apparatus guided radiotherapy apparatus with an accelerator adjustment device according to an embodiment of the present invention;
FIG. 6A is a schematic illustration of an image contrast apparatus guided radiotherapy apparatus isocenter illumination with an accelerator adjustment apparatus according to an embodiment of the present invention;
FIG. 6B is a second schematic illustration of isocenter illumination of a radiotherapy apparatus directed to an imaging contrast apparatus having an accelerator adjustment apparatus according to an embodiment of the present invention;
FIG. 7 is a schematic view of normal tissue evasion illumination of an image contrast device-guided radiotherapy device having an accelerator adjustment apparatus of an embodiment of the present invention;
FIG. 8A is a schematic diagram of a weight balancing effect of an image contrast apparatus guided radiotherapy apparatus having an accelerator adjustment device according to an embodiment of the present invention;
FIG. 8B is a schematic diagram II of the weight balancing effect of an image contrast apparatus guided radiotherapy apparatus with an accelerator adjustment device according to an embodiment of the present invention;
1. The device comprises an accelerator machine head, 2 parts of a deflection bracket, 3 parts of a machine head bearing frame, 4 parts of a balancing weight, 5 parts of a machine head adjusting device, 6 parts of a deflection bracket driving device, 7 parts of a position detecting device, 8 parts of a centering device, 9 parts of a machine head deflection driving positioning device, 10 parts of an image contrast device, 11 parts of a contrast device bracket, 12 parts of a contrast device rotary bearing, 13 parts of a contrast device rotary shaft, 14 parts of a deflection bracket rotary shaft, 15 parts of a machine head deflection rotary shaft, 16 parts of a patient, 17 parts of a system isocenter, 18 parts of a tumor center point 19 parts of a normal tissue of a human body, 20 parts of a tumor, 21 parts of a set screw, 22 parts of an eccentric shaft locking nut, 23 parts of an eccentric shaft, 24 parts of a bearing roller, 25 parts of a centering hole, 26 parts of a ray bundle, 27 parts of a main shielding area, 28 parts of a treatment room, 29 parts of a connecting piece.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1 and 3, an accelerator adjustment device for a radiotherapy apparatus guided by an image contrast apparatus according to an embodiment of the present invention is provided; the adjusting device comprises a machine head bearing frame 3, a machine head lifting adjusting device 5 and a deflection bracket 2.
The machine head bearing frame 3 is provided with an accelerator machine head 1 and a machine head deflection driving positioning device 9, and a transmitting source and a multi-leaf collimator (MLC) are arranged in the accelerator machine head 1 and are used for transmitting rays to carry out radiotherapy on tumors; the head deflection driving positioning device 9 is positioned at the periphery of the accelerator head 1, can drive the accelerator head 1 to perform a certain angle of rotation deflection movement around the accelerator head deflection rotary shaft 15, and can measure and feed back the deflection position.
The machine head lifting adjusting device 5 is positioned between the machine head bearing frame 3 and the deflection bracket 2, and can be used for adjusting the height of the machine head bearing frame 3 in an up-down telescopic way.
The deflection bracket 2 is a gantry bracket and is provided with a deflection bracket rotating shaft 14, and a deflection driving device 6 is arranged on the gantry bracket and can drive the deflection bracket 2 to rotate around the deflection bracket rotating shaft 14; thereby driving the accelerator head 1 to deflect around the deflection bracket rotating shaft 14.
The accelerator head adjusting device and the image contrast device 10 have two configuration relations, one is to integrate the radiotherapy accelerator adjusting device and the image contrast device 10, so that the accelerator adjusting device and the image contrast device 10 rotate simultaneously to carry out radiotherapy on tumors, and the accelerator head adjusting device and the image contrast device are directly connected across two sides of the contrast imaging device through the deflection bracket 2 as shown in fig. 4A. Another configuration is that the accelerator adjusting device is mounted outside the image contrast apparatus 10 through the connection member 29, and can perform rotational radiation treatment independently or simultaneously with the image contrast apparatus 10, as shown in fig. 4B.
The structure and operation of the accelerator adjusting device of the present invention will be described in detail with reference to fig. 1 to 7, in conjunction with a first configuration relationship between the accelerator adjusting device and the image contrast apparatus.
As shown in fig. 5, an image contrast apparatus-guided radiotherapy apparatus has an accelerator adjusting device as shown in fig. 1, wherein a yaw support 2 spans across two sides of an image contrast apparatus 10 and is fixed to the image contrast apparatus 10 by fixing screws 21, and the yaw support 2 is driven synchronously by two sides to drive the accelerator head 1 and the whole adjusting device to yaw around a yaw support rotation axis 14. The image contrast device 10 is used for scanning and imaging tumor of a patient, and carries out accurate radiotherapy on the tumor through an image-guided radiotherapy device, the image contrast device 10 comprises nuclear magnetism MRI, CT, DR and the like, the whole set of radiotherapy device is fixed and supported through a contrast device bracket 11, and the contrast device bracket 11 is arranged on the image contrast device 10 through a contrast device slewing bearing 12, so that the image contrast device can do slewing motion around a contrast device slewing shaft 13.
In radiotherapy, it is generally desirable that the center of the radiation beam is coincident with the center of the tissue to be treated, such as a tumor, to ensure consistent radiation doses at each site; at the same time, it is required to avoid damage to normal tissues that block the tumor as much as possible.
The following describes how the accelerator head adjusting device of the present invention works in combination with the problems of isocentric irradiation and avoidance of normal human tissue.
Isocentric illumination
Referring to fig. 6A, the ideal irradiation mode is to position the tumor center point 18 onto the system isocenter 17 by moving the treatment couch or the like (i.e., the system isocenter 17 and the tumor center point 18 are coincident, the system isocenter 17 is coincident with the rotation axis 13 of the contrast apparatus), and the handpiece 1 of the accelerator rotates around the system isocenter 17, so that the isocentric rotation of the tumor center point 18 can be realized. In this case, since the tumor center point 18 is located at the rotation center of the radiation source, the distance between the accelerator head 1 and the tumor center point 18 is a fixed value at each point during the rotation of the accelerator head 1 around the rotation axis 13 of the contrast apparatus, and the dose at the tumor center point 18 is not changed due to the distance or the like, so that the isocentric irradiation is realized.
However, in practical applications, due to the different types, structures and imaging principles of the imaging apparatus, the movement distance of the treatment couch is limited and the treatment couch cannot be randomly positioned, so that the position of the tumor center point 18 may deviate from the system center point 17, as shown in fig. 6A, in this case, if the accelerator handpiece 1 continues to rotate around the rotation axis 13 of the imaging apparatus in the original manner, a situation such as that the beam cannot irradiate the tumor center point 18 may occur. For irradiation of the tumor center point 18, the existing apparatus can only irradiate the beam of rays at the tumor center point 18 by deflecting the accelerator head 1 by an angle α about the head yaw pivot axis 15. In this way, however, the distance from the accelerator head 1 to the tumor center point 18 must be different at various positions of the rotation locus, which results in a change in the dose of radiation reaching the tumor center point 18.
The adjusting device of the invention has the machine head lifting adjusting device 5, and can adjust the position of the accelerator machine head 1 up and down through expansion and contraction, so that the adjusting range is larger, and the isocenter irradiation is realized.
Specifically, when the tumor center point 18 of the patient 16 cannot be placed on the system isocenter 17, the tumor is scanned and imaged by the image radiography device 10 before radiotherapy, so that the relative position of the tumor center point 18 and the system isocenter 17 is calculated and determined, and the accelerator head 1 deflection angle alpha at each point on the rotation path of the accelerator head 1 around the radiography device rotation axis 13 is calculated by the radiotherapy system control host machine. The distance D between the accelerator head 1 and the tumor center point 18 can be calculated through the irradiation dose of the tumor center point 18 required by treatment, and the distance A between the head bearing frame 3 and the deflection bracket 2 at each point on the rotation path can be calculated under the condition that the distance D is kept unchanged.
Then, at the beginning of radiotherapy, as shown in fig. 6A, the head deflection driving positioning device 9 drives the accelerator head 1 to deflect around the head deflection rotating shaft 15 by a certain angle according to the head deflection angle of the control host computer of the radiotherapy system, and meanwhile, the head adjusting device 5 adjusts the distance a between the head bearing frame 3 and the deflection bracket 2 by self-expansion, so that the beam emitted by the accelerator head 1 is aligned to the tumor center 18 and the distance D, and the irradiation dose required by the therapy is reached.
Next, as shown in fig. 6B, when the accelerator handpiece 1 rotates around the rotation axis 13 of the radiography apparatus, i.e. the system isocenter 17, the handpiece yaw driving positioning device 9 drives the accelerator handpiece 1 to yaw around the handpiece yaw rotation axis 15 to an angle β according to the handpiece yaw angle at the position calculated by the radiotherapy system control host, and simultaneously, the handpiece lift adjustment device 5 adjusts the distance between the handpiece carrier 3 and the yaw support 2 to B by self-telescoping, so that the beam emitted by the accelerator handpiece 1 is aligned to the tumor center 18 and the distance D, thereby achieving the irradiation dose required for treatment.
Thus, as described above, when the accelerator handpiece 1 performs continuous rotation irradiation treatment around the apparatus isocenter 17, the handpiece yaw drive positioning device 9 drives the accelerator handpiece 1 to yaw according to the real-time position, and at the same time, the handpiece adjustment device 5 adjusts the distance between the handpiece carrier 3 and the yaw support 2 by self-expansion and contraction to ensure that the beam emitted by the accelerator handpiece 1 is aligned with the tumor center 18 and has the distance D, thus realizing the isocenter irradiation treatment of the radiotherapy.
Fig. 2 shows a specific embodiment of a machine head lifting adjusting device 5, which consists of a plurality of lifting rods 51, wherein the lifting rods 51 are screw lifting rods. The lifter 51 includes: the lifting column 512 is sleeved in the lifting seat 511 through a sliding guide sleeve 513, a motor 515 is fixed at the bottom of the lifting seat 511, the motor 515 is fixed at the bottom of the lifting seat 511, a ball screw 516 is connected to the motor 515 through an elastic coupler 514, a ball screw nut 518 is sleeved on the ball screw 516, a ball screw nut seat 517 is sleeved outside the ball screw nut 518, and the ball screw nut seat 517 is fixed on the inner wall of the lifting column 512. In this way, the motor 515 drives the ball screw nut 518 to move up and down through the ball screw 516, and the ball screw nut seat 517 plays a limiting role, so that the lifting column 512 can be driven to move up and down when the ball screw nut 518 moves up and down.
The sliding guide sleeve 513 can reduce the gap between the lifting column 512 and the lifting seat 511 and the friction force during the up-and-down movement, and reduce the power of the driving motor. The sliding guide sleeve 513 may be made of a sliding guide material such as brass, nylon, POM, or polytetrafluoroethylene.
Avoiding radiation irradiation of normal tissues of human body
As shown in fig. 5 and 7, when the accelerator head 1 continuously rotates around the rotation axis 13 of the radiography device to perform the isocentric irradiation on the tumor 20, if the normal tissue 19 of the human body shields the tumor 20 within a certain rotation range on the rotation irradiation path of the accelerator head 1 on the tumor 20, the radiation must pass through the normal tissue 19 of the human body to irradiate the tumor 20, so that the radiation may damage the normal tissue 19 of the human body, and therefore, radiation irradiation on the normal tissue of the human body is avoided as much as possible during the radiotherapy.
When continuous isocentric radiotherapy for avoiding normal human tissue 19 is performed, firstly, the tumor 20 and peripheral normal human tissue 19 of a patient 16 are scanned and imaged by the image radiography equipment 10, the relative positions and the outline shape of the isocenter 17, the tumor 20 and the normal human tissue 19 needing to be avoided and irradiated are determined, the radiotherapy system control host calculates the irradiation path for the isocentric radiotherapy of the tumor 20, and meanwhile, the irradiation path for the accelerator handpiece 1 for avoiding the normal human tissue 19 is planned according to the outline of the normal human tissue 19, and the avoidance irradiation process is implemented specifically as follows.
The accelerator head 1 rotates around the contrast apparatus swivel axis 13 and the deflection bracket 2 is driven by the deflection bracket driving device 6 to perform deflection movement around the deflection bracket swivel axis 14, so that the accelerator head 1 fixed on the deflection bracket 2 is driven to perform deflection movement around the deflection bracket swivel axis 14, and therefore the accelerator head 1 performs rotation movement in two dimensions around the contrast apparatus swivel axis 13 and the deflection bracket swivel axis 14. According to the planned path of the main control unit of the radiotherapy system, which is designed to avoid the normal tissue 19 of the human body, the positions and the speeds of the accelerator head 1 around the rotating shaft 13 of the contrast device and the rotating shaft 14 of the deflection bracket can be respectively controlled, so that the accelerator head 1 can carry out irradiation treatment along the planned path, thereby avoiding the normal tissue 19 of the human body.
Deflection bracket position detection device
Further, as shown in fig. 1 and 5, the yaw support 2 is further provided with a yaw support position detection device 7, which can use a high-precision rotary encoder or a grating ruler to detect the speed and the position of the feedback yaw support 2 when the yaw support rotates around the yaw support rotating shaft 14 in real time, so that the accelerator head 1 can be accurately controlled to accurately perform irradiation treatment along a planned path, and simultaneously, when the yaw support driving device 6 fails, the device can timely alarm and stop, thereby ensuring the installability of the treatment process.
Aligning device
Further, since the yaw support 2 is a gantry support, the two sides of the yaw support are mostly in a crossing installation structure, and since the mechanical structure may have accumulated errors during processing and assembling, the non-concentricity of the yaw support 2 after the two sides of the yaw support are installed may be caused, so that the driving resistance of the yaw support driving device 6 may be increased, the two sides of the yaw support 2 are stressed unevenly and distorted, and even the irradiation treatment precision of the accelerator handpiece 1 may be affected. Therefore, the deflection bracket aligning devices 8 are designed on two sides of the deflection bracket 2, as shown in fig. 1 and 5.
The aligning device 8 has a structure as shown in fig. 3a and 3b, and the aligning device 8 includes: eccentric shaft locking nut 22, eccentric shaft 23, bearing roller 24 and aligning hole 25; the aligning hole 25 is arranged on the image contrast device 10, the center of the aligning hole 25 is positioned on the deflection bracket rotating shaft 14, a plurality of roller bearings 24 are arranged in the aligning hole 25, and the eccentric shaft 23 penetrates through the deflection bracket 2 to be connected with the roller bearings 24 and is locked by the eccentric shaft locking nut 22. If the accelerator head adjustment device is in a second configuration with the image contrast apparatus, the alignment aperture 25 is located on the connector 29.
When the device is used, the fixing screws 21 fixed on the imaging device 10 at two sides of the deflection bracket 2 are loosened, the eccentric shaft locking nuts 22 are loosened, the eccentric shafts 23 at two sides of the deflection bracket aligning device 8 are respectively rotated and adjusted to drive the bearing rollers 24 to deflect in the aligning holes 25 of the imaging device, the rotating shafts 14 of the deflection bracket are adjusted to coincide with the central shafts of the aligning holes 25 of the bracket, and after the two sides of the deflection bracket 2 are simultaneously adjusted to be concentric and coincident, the eccentric shaft locking nuts 22 and the fixing screws 21 at two sides of the deflection bracket 2 are locked.
Balancing weight
Further, as shown in fig. 8A, the adjusting device of the embodiment of the present invention is further provided with a weight 4, which is located at the lower end of the yaw bracket 2 and corresponds to the accelerator head 1. Because the accelerator head 1 has a heavy weight due to the functional structure requirement, when one end of the deflection bracket 2 rotates along the deflection bracket rotating shaft 14, the deflection bracket driving device 6 can drive the stress unbalance to influence the operation stability of the deflection bracket, so that the other end of the deflection bracket 2 is provided with the high-density balancing weight 4 with the same weight as the accelerator head 1 in order to ensure the operation stability, and the deflection bracket driving device 6 can drive the stress balance and operate stably.
Meanwhile, referring to fig. 8B, when the accelerator handpiece 1 emits the ray beam 26 during the radiotherapy, a part of energy of the ray beam 26 is used for the rest of the tumor irradiation treatment and is irradiated outwards, so that shielding and absorption of the redundant ray beam 26 are required to prevent injury to other personnel and equipment. As shown in fig. 6B, the radiotherapy apparatus is installed in the treatment room 28, and when the accelerator head 1 rotates around the rotation axis 13 of the radiography apparatus to perform irradiation treatment, that is, the radiation beam 26 also rotates around the rotation axis 13 of the radiography apparatus, so that a shielding layer having a certain width, that is, a main shielding area 27, needs to be formed at a position of the treatment room 28 corresponding to the rotation position of the radiation beam 26 in order to shield and absorb radiation. Because the beam 26 is relatively high in energy, the primary shielding region needs to be made of a large thickness to completely shield and absorb the excess radiation, which results in a large space occupation of the treatment room 28 and an increase in construction costs. The balancing weight 4 which is equivalent to the accelerator handpiece 1 in weight is arranged at the other end of the deflection bracket 2, and the balancing weight 4 is made of high-density metal materials, so that the energy of the shielding rays can be effectively absorbed, the energy of the ray bundle 26 is greatly attenuated after passing through the seed matching block 4, the thickness of the main shielding area 27 is greatly reduced, the space of the river-increasing treatment room 28 is realized, and the construction cost is reduced.
In summary, the radiotherapy accelerator adjusting device provided by the embodiment of the invention is used for a radiotherapy system guided by an image, and can solve the problem that the existing product can only carry out single-dimensional radiotherapy. The problem that the tumor and the whole rotation treatment center of the equipment are not concentric due to the structural limitation of the image radiography equipment can be solved, namely the problem of the isocenter of radiation treatment irradiation is solved, the multi-dimensional continuous rotation irradiation treatment of the accelerator radioactive source to the tumor is realized, the radioactive source deflection can be carried out to avoid the irradiation to the normal human tissue when the normal human tissue shields the tumor, the radiation treatment time of a patient is shortened, and the radiation treatment effect is improved. Furthermore, the high-density material balancing weights are arranged at symmetrical ends of the accelerator machine head and used for balancing the stress at two ends of the accelerator support, so that the problem of unbalanced driving force of the deflection support is solved, and meanwhile, the high-density metal balancing weights can also shield and absorb part of rays, so that the shielding layer of the main shielding area of the treatment room is thinned, the space of the treatment room is increased, and the construction cost of the treatment room is reduced.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. An accelerator adjusting device for a radiotherapy device guided by a radiography imaging device is characterized in that the accelerator adjusting device comprises a machine head bearing frame, a machine head lifting adjusting device and a deflection bracket,
The machine head deflection driving and positioning device can drive the accelerator machine head to do rotary deflection movement around the machine head deflection rotary shaft and can measure and feed back the deflection position;
the machine head lifting adjusting device is positioned between the machine head bearing frame and the deflection bracket and can be used for adjusting the height of the machine head bearing frame in an up-and-down telescopic manner;
The deflection bracket is a gantry bracket and is provided with a deflection bracket rotating shaft, and a deflection bracket driving device is arranged on the deflection bracket and can drive the deflection bracket to deflect around the deflection bracket rotating shaft so as to drive the accelerator machine head to deflect around the deflection bracket rotating shaft;
The accelerator adjusting device is directly connected with two sides of the contrast imaging device in a bridging way through the deflection bracket or is arranged on the outer side of the contrast imaging device through a connecting piece so that the deflection bracket can do rotary motion along with the contrast imaging device around a rotary shaft of the contrast imaging device; the method comprises the steps that when the accelerator head rotates around a rotating shaft of the contrast device, the deflection support is driven by the deflection support driving device to perform deflection movement around the rotating shaft of the deflection support, so that the accelerator head fixed on the deflection support is driven to perform deflection movement around the rotating shaft of the deflection support, and the accelerator head performs rotation movement in two dimensions around the rotating shaft of the contrast device and the rotating shaft of the deflection support;
the two sides of the deflection bracket are also respectively provided with a centering device;
the aligning device includes: the eccentric shaft is connected with the eccentric shaft locking nut; the eccentric shaft penetrates through the deflection bracket to be connected with the roller bearing, and is locked by the eccentric shaft locking nut;
When the eccentric shaft centering device is used, the fixing screws on the two sides of the eccentric support are firstly loosened, the eccentric shaft locking nuts are unscrewed, the eccentric shafts on the two sides of the eccentric support centering device are respectively rotated and adjusted to drive the bearing rollers to deflect in the centering holes of the imaging device, the rotating shafts of the eccentric support are adjusted to coincide with the central shafts of the supporting centering holes, and after the two sides of the eccentric support are simultaneously adjusted to be concentric and coincident, the eccentric shaft locking nuts and the fixing screws on the two sides of the eccentric support are locked.
2. The accelerator adjusting device according to claim 1, wherein the yaw support is further provided with a position detecting device.
3. The accelerator adjustment device of claim 2, wherein the position detection device is a rotary encoder or a grating scale.
4. The accelerator adjustment device of claim 1, wherein the head lift adjustment device is comprised of a plurality of lift bars, the lift bars being screw lift bars.
5. The accelerator adjustment device according to claim 4, wherein the screw lifter includes: the lifting column is sleeved with the lifting seat through a sliding guide sleeve, a motor is fixed at the bottom of the lifting seat, the motor is connected with a ball screw through a coupling, a ball screw nut is sleeved on the ball screw, a ball screw nut seat is sleeved outside the ball screw nut, and the ball screw nut seat is fixed on the inner wall of the lifting column.
6. The accelerator adjusting device according to claim 4, wherein the head lift adjusting device is constituted by four lift bars.
7. The accelerator adjustment device of claim 1, further comprising a weight positioned below the yaw support.
8. The accelerator adjustment device of claim 7, wherein the weight is a metal weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811646062.4A CN109847198B (en) | 2018-12-29 | 2018-12-29 | Accelerator adjusting device |
Applications Claiming Priority (1)
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205759156U (en) * | 2016-05-31 | 2016-12-07 | 林玲玲 | A kind of radiation locating support |
| CN108310681A (en) * | 2018-03-09 | 2018-07-24 | 陈亮 | A kind of clinac and its control method |
| CN209662466U (en) * | 2018-12-29 | 2019-11-22 | 佛山瑞加图医疗科技有限公司 | A kind of accelerator adjustment device |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05214908A (en) * | 1992-01-31 | 1993-08-24 | Yamaha Motor Co Ltd | Initial tension adjusting tool for valve system |
| CN2252639Y (en) * | 1995-12-31 | 1997-04-23 | 宁博 | Radiotherapy lead mould bracket |
| EP1075855A1 (en) * | 1999-08-11 | 2001-02-14 | Jean Valentin | Device for stereotactic radiotherapy |
| CN1537657A (en) * | 2003-10-22 | 2004-10-20 | 高春平 | Radiotherapeutic apparatus in operation |
| CN201833134U (en) * | 2010-11-02 | 2011-05-18 | 补家武 | Guiding and supporting dual-purpose slide block mechanism for numerical control cutting machine |
| US8536547B2 (en) * | 2011-01-20 | 2013-09-17 | Accuray Incorporated | Ring gantry radiation treatment delivery system with dynamically controllable inward extension of treatment head |
| CN103071241B (en) * | 2011-10-25 | 2015-12-30 | 苏州雷泰医疗科技有限公司 | Stereotactic radiotherapeutic device |
| CN202427061U (en) * | 2011-12-21 | 2012-09-12 | 陈渝 | Tumor radiotherapy device capable of reducing field automatically |
| CN203570648U (en) * | 2013-12-03 | 2014-04-30 | 山东双轮股份有限公司 | Center-adjustable bearing body structure |
| CN105920746A (en) * | 2016-06-16 | 2016-09-07 | 四川大学 | Radiation therapy device |
| CN105920745B (en) * | 2016-06-16 | 2019-02-15 | 四川大学 | radiation therapy system |
| CN106139419B (en) * | 2016-07-29 | 2022-10-28 | 中国原子能科学研究院 | Rotating frame for treating tumors |
| CN107362464A (en) * | 2017-08-13 | 2017-11-21 | 吴大可 | Accurate Stereotactic Radiosurgery device |
-
2018
- 2018-12-29 CN CN201811646062.4A patent/CN109847198B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205759156U (en) * | 2016-05-31 | 2016-12-07 | 林玲玲 | A kind of radiation locating support |
| CN108310681A (en) * | 2018-03-09 | 2018-07-24 | 陈亮 | A kind of clinac and its control method |
| CN209662466U (en) * | 2018-12-29 | 2019-11-22 | 佛山瑞加图医疗科技有限公司 | A kind of accelerator adjustment device |
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