CN106725566A - A kind of CT equipment based on C-arm - Google Patents

Abstract

The invention discloses a CT device based on a C-arm, which includes a device body, a C-arm, a radiation source and an imaging panel, the C-arm is supported on the device body, the radiation source and the imaging panel Arranged oppositely, and respectively located at both ends of the opening of the C-shaped arm; the CT equipment further includes the following components: a first adjustment component, used to adjust the radial position of the radiation source; and/or; a second adjustment The component is used to adjust the radial position of the imaging flat panel; the CT equipment can obtain the desired exposure and imaging requirements only by adjusting the radial position of the radiation source and/or the imaging flat panel without moving the patient. The required imaging field of view is simple in structure and easy to control.

Description

A C-arm-based CT device

technical field

The invention relates to the technical field of medical devices, in particular to a C-arm-based CT device.

Background technique

C-arm CT equipment is a commonly used medical inspection equipment. This C-arm CT equipment is widely used in orthopedics, pain management because of its own advantages in isocentric imaging and three-dimensional reconstruction. In various surgeries in Departments of Medicine, Oncology, Gynecology, Urology and other departments.

At present, the CT equipment mainly includes a device body, a C-arm, a radiation source and an imaging panel; the C-arm is slidably arranged on the device body so that the C-arm can slide relative to the device body in the circumferential direction, and the radiation source is set opposite to the imaging panel. They are respectively arranged at the two ends of the opening of the C-arm. The ray light source is usually a point light source, and the point light source can emit a cone-shaped light beam. The most commonly used point light source in the prior art is an X-ray point light source.

When the CT equipment is in use, the object to be inspected is placed inside the C-arm, and the X-rays emitted by the point light source pass through the object to be inspected, forming an image with a certain viewing angle on the imaging flat panel. When the CT equipment isocentrically images, the object to be detected is at a fixed exposure position, so the angle of view of the picture obtained by exposure is too single, and the local position of the detection part is not obvious. Therefore, in order to overcome the above-mentioned defects, the following improvements have been made to the CT equipment in the prior art.

The drive shaft is set on the device body, and the C-arm can be driven to move relatively along the horizontal direction and the vertical direction of the opening. When adjusting the local position angle of the detected part, by simultaneously adjusting the C-arm Directional and circumferential sliding, and then adjust the exposure center point, so as to obtain the viewing angle change.

The above-mentioned method of adjusting the viewing angle in the prior art needs to adjust the horizontal, vertical and circumferential positions of the C-arm at the same time, that is, multi-axis control is required to realize the multi-axis movement of the C-arm, which will inevitably lead to the CT equipment in the prior art The structure is relatively complicated, and the horizontal and vertical positions of the C-arm need to be adjusted in real time during the rotation process of the C-arm, and the control is also relatively complicated.

Therefore, how to provide a CT device with simple structure and easy adjustment of viewing angle is a technical problem to be solved urgently by those skilled in the art.

Contents of the invention

In order to solve the above technical problems, the present invention provides a C-arm-based CT device, including a device body, a C-arm, a radiation source and an imaging panel, the C-arm is supported on the device body, and the radiation source Arranged opposite to the imaging flat panel, and located at both ends of the opening of the C-arm; the CT equipment also includes the following components:

a first adjusting component, used to adjust the radial position of the radiation source;

and/or;

The second adjusting component is used for adjusting the radial position of the imaging flat plate.

When the CT equipment provided by the present invention is applied, the detected model (patient) is usually placed in the central position of the C-arm. In the initial state, the center between the ray light source and the imaging panel is consistent with the center of the C-arm. When O is the isocenter point, the light emitted by the ray source just covers the scope of the imaging panel, and its viewing angle is a. At this time, if the model to be detected is fixed in the middle of the C-arm, the pictures collected by the imaging panel will be obtained. The collection angle of view for detecting the angle of model a. If the model is too large, a wider field of view is required. At this time, as long as the first adjustment part is used to adjust the ray source to move away from the detected model in the radial direction, or the second adjustment part is used to adjust the imaging flat panel to be close to the detected model, the acquisition angle can be increased. one request. Of course, the first adjustment component and the second adjustment component can also be controlled simultaneously to complete the adjustment of the position of the radiation source and the imaging flat panel, so as to obtain an optimal imaging field of view.

Correspondingly, if the model needs to be locally refined, a smaller viewing angle is required to observe the details of the local detected model. At this time, only the first adjustment component is used to adjust the ray source to approach the detected model in the radial direction or the second adjustment component Adjusting the imaging flat plate away from the detected model can meet the requirement of a smaller acquisition angle of view. That is to say, reduce the distance between the ray source and the model to be tested or increase the distance between the imaging plate and the model to be tested.

It can be seen from the above description that the C-arm-based CT equipment provided by the present invention can adjust the radial position of the radiation source and/or the imaging flat panel only by adjusting the radial position of the radiation source and/or the imaging flat panel according to the actual exposure and imaging requirements without moving the patient, that is, The desired imaging field of view can be obtained, the structure is simple, and it is easy to control.

Optionally, the first adjustment part and the second adjustment part are respectively arranged at both ends of the opening of the C-shaped arm, and the radiation light source and the imaging flat plate are respectively arranged at the first adjustment part and the second adjustment part. opposite ends of the second adjustment member.

Optionally, the first adjustment component is a threaded assembly, the radiation source includes a carrier and a light source fixed on the carrier, and the carrier is connected to the C-arm through the threaded assembly.

Optionally, the threaded assembly includes a screw provided at the outer end of the carrier, and the corresponding matching position of the C-shaped arm is provided with an internal threaded hole matching the external thread of the screw, and the screw in the radial direction The internally threaded hole is threadedly connected.

Optionally, the first adjusting part further includes a power part, the power part is fixed to the C-shaped arm, and the power part is used to drive the screw rod to move radially relative to the internally threaded hole.

Optionally, the first adjusting part also includes a worm gear and a worm that mesh with each other, the worm gear is rotatably supported on the C-shaped arm through a bearing, and a nut is fixed on its inner ring, and the inner hole of the nut forms the An internally threaded hole, the position of the C-shaped arm opposite to the internally threaded hole is provided with a through hole, and the external thread of the screw rod passes through the through hole and is connected to the inner hole of the nut; the drive of the power part A shaft connects the worm.

Optionally, one end of the worm is further provided with a driven bevel gear, and the outer end of the drive shaft of the power component is further provided with a driving bevel gear meshed with the driven bevel gear.

Optionally, the opening position of the C-arm is a plate structure, and the worm wheel, the worm and the power component are all fixed on the outer wall of the plate structure.

Optionally, the power component is a servo motor, and the CT equipment further includes a controller, and the controller controls the rotation direction and the number of rotations of the servo motor according to external instructions.

Optionally, the second adjusting component has the same structure as the first adjusting component.

Optionally, the C-shaped arm relatively reciprocates along the circumference of the device body.

Optionally, one of the opposite surfaces of the equipment body and the C-arm is provided with a slide slot, and the other is provided with a slide rail matched with the slide slot, and the CT equipment further includes Two groups are respectively used to pull the synchronous belt and the driving device of the C-arm forward rotation and reverse rotation.

Description of drawings

Fig. 1 is a schematic structural view of a CT device based on a C-arm in a specific embodiment of the present invention;

Fig. 2 is a partially enlarged schematic diagram of the position where the first adjusting component is installed in Fig. 1;

FIG. 3 is a partial enlarged schematic view of the installation position of the second adjusting component in FIG. 1 .

Among them, in Figure 1 to Figure 3:

Equipment body 1, C-arm 2, chute 21, ray light source 3, imaging plate 4, first adjustment member 5, screw 51, nut 52, worm wheel 53, worm 54, driven bevel gear 55, driving bevel gear 56, Power component 57, support plate 581, support plate 582, support plate 583, second adjustment component 6, screw 61, nut 62, worm wheel 63, worm 64, driven bevel gear 65, power component 67, plate structure 7, plate structure 8.

detailed description

Aiming at the technical problem that the prior art CT equipment described in the background art requires multi-axis actions to adjust the structure and control when adjusting the viewing angle, the present invention has carried out in-depth research, and based on a large number of studies, it has found another way to propose A technical solution for solving the above-mentioned technical problems.

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to FIG. 1 and FIG. 2 , FIG. 1 is a schematic structural diagram of a CT device based on a C-arm in a specific embodiment of the present invention; FIG. 2 is a partially enlarged schematic diagram of the position where the first adjustment component is installed in FIG. 1 .

The C-arm-based CT device provided in the present invention mainly includes a device body 1 , a C-arm 2 , a radiation source 3 and an imaging flat panel 4 . The main function of the device body 1 has two aspects: first, it provides an installation foundation for the installation of other components, and has an installation structure that matches the external environment, so as to be stably installed in the external environment; second, it has a supporting role, that is, the main body of the device has A certain strength meets the support requirements of each component on it.

For the main structure and materials of the main body of the device, reference can be made to the prior art, which will not be specifically introduced in this article.

The C-shaped arm 2 is rotatably supported on the device body 1 , that is to say, the C-shaped arm 2 can relatively reciprocate and rotate along the peripheral direction of the device body 1 . There are many forms of structures for realizing the relative reciprocating rotation of the C-arm 2 and the device body 1, for example: one of the opposing surfaces of the device body 1 and the C-arm 2 is provided with a chute, and the other is provided with a chute. The matching slide rail, that is, a slide rail or a slide groove can be arranged on the device body 1 , and correspondingly, a slide groove or a slide rail can be arranged on the C-arm 2 . Fig. 1 shows the specific implementation manner of setting the chute 21 on the C-shaped arm 2. Specifically, the device body 1 may be provided with a support arc section whose shape matches the outer surface of the C-arm 2 , and slide rails or slide grooves may be provided on the support arc section.

In addition, the CT equipment also includes two sets of synchronous belts and driving devices for pulling the C-arm 2 forward and reverse respectively, that is, the CT equipment includes a first driving device and a first synchronous belt driven by the first driving device, and The second driving device and the second synchronous belt driven by the second driving device, the first driving device drives the first synchronous belt to realize the forward rotation of the C-arm 2, and the second group of driving devices drives the second synchronous belt to realize the C-arm 2 inversion. In this paper, the clockwise rotation of the C-arm 2 is defined as forward rotation, and the counterclockwise rotation is defined as reverse rotation.

One end of the first synchronous belt and the second synchronous belt can be respectively connected to the rotating shaft of the first driving device and the rotating shaft of the second driving device, and the other ends of the two are respectively connected to the two open ends of the C-arm 2 .

Of course, the way of driving the C-arm 2 to rotate forward and backward is not limited to the synchronous belt form described above. Also can be mode such as stay rope, chain, rack.

The radiation source 3 and the imaging flat panel 4 in the CT device of the present invention can be arranged oppositely, and both are respectively located at both ends of the opening of the C-arm 2 . The radiation source 3 may be a light source emitting X-rays, and certainly may be a light source emitting other detection radiations. The ray light source 3 generally emits a cone-shaped beam, and the detected object is imaged on the imaging flat panel 4 after being transmitted by the ray.

The CT equipment provided by the present invention further includes a first adjustment component 5 and a second adjustment component 6, wherein the first adjustment component 5 is used to adjust the radial position of the radiation source 3; the second adjustment component 6 is used to adjust the imaging flat panel 4 radial position. The first adjustment part 5 and the second adjustment part 6 can be respectively arranged at the two ends of the opening of the C-shaped arm 2, and the radiation light source 3 and the imaging flat panel 4 are respectively arranged at the opposite ends of the first adjustment part 5 and the second adjustment part 6 .

During the application of the CT equipment provided by the present invention, the detected model (patient) is usually placed in the central position of the C-arm 2, and in the initial state, the center between the radiation source 3 and the imaging panel 4 and the center of the C-arm 2 are Consistent, at this time O is the isocenter point, the light emitted by the ray source 3 just covers the scope of the imaging flat panel 4, and its viewing angle is a. The collected pictures will get the collection angle of angle a of the detected model. If the model is too large, a wider field of view is needed. At this time, as long as the first adjustment component 5 is used to adjust the radiation source 3 to move away from the detected model in the radial direction, or the second adjustment component 6 is used to adjust the imaging flat panel 4 to be close to the detected model, the increase can be satisfied. The requirement of a large collection angle of view. Of course, the first adjustment component 5 and the second adjustment component 6 can also be controlled at the same time to complete the adjustment of the positions of the radiation source 3 and the imaging flat panel 4 to obtain an optimal imaging field of view.

Correspondingly, if the model needs to be locally refined, a smaller viewing angle is required to observe the details of the local detected model. At this time, only the first adjustment component 5 is used to adjust the ray source 3 to approach the detected model in the radial direction or pass the second The adjustment component 6 adjusts the imaging flat plate 4 away from the detected model to meet the requirement of a smaller acquisition angle of view. That is to say, reduce the distance between the radiation source 3 and the model to be tested or increase the distance between the imaging plate 4 and the model to be tested.

It can be seen from the above description that the C-arm-based CT equipment provided by the present invention can adjust the radial position of the radiation source 3 and/or the imaging flat panel 4 according to the actual exposure and imaging requirements without moving the patient. , the desired imaging field of view can be obtained, the structure is simple, and it is easy to control.

As can be seen from the above description, the C-arm-based CT equipment in the present invention realizes the flexibility of field of view adjustment by three technical solutions: first, the first adjustment component 5 is set, and only the first adjustment component 5 is used to adjust the radiation source 3 The radial position of the imaging panel 4 and the C-arm 2 are fixed; second, the second adjustment component 6 is set, and only the second adjustment component 6 is used to adjust the radial position of the imaging panel 4, and the radiation source 3 is fixed to the C-arm 2 ; Third, the first adjustment component 5 and the second adjustment component 6 are set at the same time to adjust the radial positions of the radiation source 3 and the imaging flat panel 4 respectively. This article further introduces the specific structures of the first adjusting component 5 and the second adjusting component 6 on the basis of the third technical solution.

In a specific embodiment, the first adjusting part 5 can be a threaded assembly, the radiation source 3 specifically includes a carrier and a light source fixed on the carrier, the light source is used to emit a cone-shaped radiation beam, and the carrier is connected to the C-arm through the threaded assembly 2. That is to say, the radiation source 3 is screwed to the C-arm 2 through a screw assembly, and the carrier of the radiation source 3 can move radially outward and inward along the C-arm 2 by rotating the thread.

The threaded connection realizes the 3-position adjustment of the ray light source, which has a simple structure and is easy to realize.

Specifically, the screw assembly can include a screw 51 arranged on the outer end of the carrier, that is, the lower end surface of the carrier can be equipped with a light source, and the upper end surface can be a screw 51 structure, and the screw 51 is provided with external threads, and the C-shaped arm 2 is in a corresponding position. An internally threaded hole matching the external thread of the screw rod 51 is provided, and the screw rod 51 is threadedly connected to the internally threaded hole along the radial direction. It should be noted that the internally threaded hole can be directly provided on the C-arm 2 , or it can also be provided on a third component fixedly connected with the C-arm 2 .

By rotating the screw 51 , under the action of the thread, the screw 51 can move outward or inward relative to the threaded hole, so as to adjust the position of the radiation source 3 .

In order to realize the automatic control of the instrument, the CT equipment in the present invention may also include a power part 57, which is fixed on the C-arm 2, and the power part 57 is used to drive the screw rod 51 to move radially relative to the inner threaded hole. The power part 57 can drive the screw rod 51 to act according to the external control instruction, which is beneficial to realize the automatic control and improve the precision.

In order to optimize the arrangement position of the first adjusting part 5 on the C-shaped arm 2, the first adjusting part 5 in the present invention is further provided with a worm wheel 53 and a worm 54, and the worm wheel 53 is rotatably supported on the C-shaped arm 2 through a bearing. A nut 52 is fixed on the inner ring, and the nut 52 can be fixed on the worm wheel 53 through screws, and the worm wheel 53 can be rotatably supported on the C-arm 2 through a bearing bearing. The inner hole of the nut 52 forms an inner threaded hole, and the position opposite to the inner threaded hole of the C-shaped arm 2 is provided with a through hole, and the outer thread of the screw rod 51 passes through the through hole and is connected to the inner hole of the nut 52 . The drive shaft of the power unit 57 is connected to the worm 54 .

The transmission direction can be changed by the worm gear 54, which facilitates the arrangement of components such as the power component 57.

Further, one end of the worm 54 may also be provided with a driven bevel gear 55 , and the outer end of the drive shaft of the power component 57 may be provided with a driving bevel gear 56 meshing with the driven bevel gear 55 .

There can be one driven bevel gear 55, or two or more. Here, the preferred driven bevel gear 55 is one, that is, the driving force of the power part 57 is transmitted to the driven bevel gear 55 through the driving bevel gear 56 at the end of the drive shaft, and then the power is transmitted to the worm gear 53 meshed with it by the worm 54. The worm wheel 53 drives the nut 52 to rotate, thereby realizing the radial movement of the screw rod 51 arranged on the carrier.

In order to realize the arrangement of parts such as the above worm gear 53, worm screw 54 and power part 57, the opening position of the C-arm 2 can be provided with a plate structure 7, and the worm gear 53, worm screw 54 and power part 57 are all fixed on the outer wall of the plate structure 7.

Certainly, the turbine, the worm 54 and the power part 57 are all fixedly supported on the flat structure by corresponding support elements, for example, both ends of the worm 54 are provided with support plates, and the two support plates are respectively a support plate 581 and a support plate 582, and the worm 54 is rotatably supported on two support plates, and a bearing can be arranged between the worm screw 54 and the support plates to realize the rotation of the worm screw 54. The power component 57 may be a servo motor, and the CT apparatus further includes a controller, which controls the rotation direction and the number of rotations of the servo motor according to external instructions. The servo motor is also supported on the flat structure 7 through two support plates 583 .

Please refer to FIG. 3 . FIG. 3 is a partially enlarged schematic view of the installation position of the second adjusting component in FIG. 1 .

The structure of the second regulating part 6 may be the same as that of the first regulating part 5 . That is, the second adjustment member 6 can also be a threaded assembly, the outer end of the imaging flat panel 4 is a screw rod 61, which is provided with external threads, and the C-arm 2 is fixed with a nut 62 that matches the screw rod 61 of the imaging flat panel 4, and The C-arm 2 is provided with a through hole at the mounting position of the nut 62 , and the external thread portion of the screw rod 61 of the imaging plate 4 passes through the through hole and is disposed in the inner hole of the nut 62 .

Further, the second adjusting part 8 may include a worm wheel 63, a worm 64, a driving bevel gear (not shown in FIG. 3 due to the angle), a driven bevel gear 65, and a power part 67. Please refer to the above description for the installation positions of each part , the structure of the second adjusting component 6 will not be described in detail here. The end of the C-shaped arm 2 is also provided with a flat plate structure 8 , and the second adjusting member 8 is disposed on the flat plate structure 8 .

Of course, the structure of the first adjustment part 5 and the second adjustment part 6 is not limited to the description herein, as long as the radial position adjustment of the radiation source and the imaging flat panel can be realized, for example, the first adjustment part 5 and the second adjustment part 6 may also be a hydraulic cylinder component or a rack and pinion structure.

In addition, the structures of the first regulating member 5 and the second regulating member 6 may be the same or different.

The ray light source in this paper can be a tube, and of course it can also be in other forms.

It should be noted that the first and second mentioned herein are only for distinguishing a type of components with the same function, and do not indicate the order.

The C-arm-based CT equipment provided by the present invention has been described in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (12)

1. A CT device based on a C-arm, comprising a device body (1), a C-arm (2), a radiation source (3) and an imaging panel (4), the C-arm (2) is supported on the On the equipment body (1), the ray light source (3) and the imaging flat panel (4) are arranged oppositely, and are respectively located at both ends of the opening of the C-shaped arm (2); it is characterized in that the CT equipment Also includes the following parts: A first adjusting component (5), used to adjust the radial position of the radiation source (3); and/or; The second adjusting component (6) is used for adjusting the radial position of the imaging flat plate (4). 2. The CT device according to claim 1, characterized in that, the first adjustment member (5) and the second adjustment member (6) are respectively arranged at both ends of the opening of the C-shaped arm (2) part, the ray light source (3) and the imaging flat panel (4) are respectively arranged at opposite ends of the first adjustment part (5) and the second adjustment part (6). 3. The CT equipment according to claim 2, characterized in that, the first adjustment component (5) is a screw assembly, the radiation light source (3) includes a carrier and a light source fixed on the carrier, the The carrier is connected to the C-arm (2) through the threaded assembly. 4. The CT device according to claim 3, characterized in that, the threaded assembly includes a screw (51) arranged at the outer end of the carrier, and the corresponding matching position of the C-arm (2) is provided with a The internally threaded hole matched with the external thread of the screw rod (51), and the screw rod (51) is threadedly connected to the internally threaded hole in the radial direction. 5. The CT equipment according to claim 4, characterized in that, the first adjustment component (5) further comprises a power component (57), and the power component (57) is fixed to the C-shaped arm (2) , the power component (57) is used to drive the screw (51) to move radially relative to the internally threaded hole. 6. The CT device according to claim 5, characterized in that, the first adjustment member (5) further comprises a worm wheel (53) and a worm (54) which mesh with each other, and the worm wheel (53) is rotatably supported by a bearing On the C-shaped arm (2), a nut (52) is fixed on its inner ring, and the inner hole of the nut (52) forms the internal thread hole, and the C-shaped arm (2) and the internal thread The position opposite to the hole is provided with a through hole, and the external thread of the screw (51) passes through the through hole and is connected to the inner hole of the nut (52); the drive shaft of the power component (57) is connected to the worm (54). 7. The CT device according to claim 6, characterized in that, one end of the worm (54) is also provided with a driven bevel gear (55), and the outer end of the drive shaft of the power component (57) A driving bevel gear (56) meshing with the driven bevel gear (55) is also provided. 8. The CT device according to claim 6, characterized in that, the opening position of the C-shaped arm (2) is a flat plate structure (7), and the worm wheel (53), the worm (54) and the The power components (57) are fixed on the outer wall of the flat structure (7). 9. The CT device according to claim 5, wherein the power component (57) is a servo motor, and the CT device further comprises a controller, and the controller controls the rotation of the servo motor according to an external command direction and number of turns. 10. The CT device according to any one of claims 2 to 9, characterized in that, the second adjustment component (6) has the same structure as the first adjustment component (5). 11. The CT device according to any one of claims 1 to 9, characterized in that the C-shaped arm (2) relatively reciprocates along the circumferential direction of the device body (1). 12. The CT device according to claim 11, characterized in that, one of the opposing surfaces of the device body (1) and the C-shaped arm (2) is provided with a chute, and the other is provided with a The slide rail matched with the chute, and the CT equipment also includes two sets of synchronous belts and driving devices respectively used to pull the C-arm (2) forward and reverse.