CN119158201A - A CBCT flip bracket - Google Patents

Abstract

The invention discloses a CBCT overturning bracket which comprises a fixed module and a movable module. The CBCT bracket provided by the invention has the translational motion in X, Y, Z directions and the rotation around the Y direction, has 4 degrees of freedom, has multiple adjusting functions, and can meet the actual requirements, in particular the use requirements of Flash radiotherapy equipment with a treatment head far away from a roller frame. In addition, the bracket can be fully unfolded during working, and can be folded and stored in a non-working state, so that the bracket has good adjustment performance and storage unfolding performance.

Description

CBCT upset support

Technical Field

The invention relates to the field of tomography, in particular to a CBCT turnover bracket.

Background

CBCT, cone beam computed tomography, is a widely used medical imaging technique in radiation therapy at present. The technique is mainly to rotate an X-ray source around a patient, capture images of different angles, and then reconstruct three-dimensional tomographic images by using the images. Since CBCT uses cone beam X-rays instead of fan beams, high resolution 3D real-time images can be obtained in a shorter scan time.

In the prior art, a flat panel detector in CBCT is typically mounted on a radiotherapy apparatus using a gantry. Such as CBCT mounting brackets on medical coanda, warrior, etc., are directly rotatably mounted to the gantry. The bracket can be used on traditional radiotherapy equipment, but cannot be directly applied to Flash radiotherapy equipment, because the treatment head of the Flash radiotherapy equipment is longer than that of conventional equipment and is closer to a treatment bed, and the adjustment precision requirement is higher. In addition, flash radiotherapy equipment has the requirements of full field, half field and the like, the motion function of a CBCT bracket on the traditional radiotherapy equipment is too simple, the CBCT bracket can be adjusted in a rotating way or cannot be adjusted in a rotating way, and especially when the radiation field needs to be adjusted, the adjustment is difficult due to the lack of the adjustment direction, so that the practical requirement is difficult to meet.

Disclosure of Invention

The invention overcomes the defects of the prior art in the adjustment direction, and provides the CBCT overturning bracket, so that the problem of insufficient adjustment direction in the prior art can be expected to be solved.

In order to solve the technical problems, one embodiment of the present invention adopts the following technical scheme:

A CBCT overturning bracket comprises a fixed module and a movable module;

the fixing module comprises a fixing plate;

The moving module comprises a stand column, a rotating installation assembly, a rotating power device, a sliding installation assembly and a detector installation plate;

The upright post is arranged on the fixed module;

the rotary mounting assembly comprises a rotary mounting plate and a first sliding assembly, wherein the rotary mounting plate is rotatably connected with the upright post, the rotary power device is mounted on the rotary mounting plate and drives the rotary mounting plate to rotate, and the first sliding assembly is mounted on the rotary mounting plate;

The sliding installation assembly comprises a sliding installation plate and a second sliding assembly, wherein the sliding installation plate is installed on the first sliding assembly, and the first sliding assembly can drive the sliding installation assembly to move;

the detector mounting plate is mounted on the second sliding assembly, and the second sliding assembly can drive the detector mounting plate to move perpendicular to the sliding direction of the first sliding assembly.

In use, the flat panel detector is mounted on the detector mounting plate.

The fixing plate is arranged on the rack of the radiotherapy equipment, and before the radiotherapy equipment is used, the rotating mounting plate is parallel to the direction of the fixing plate, so that the occupied space is small;

When the detector is used, the rotary mounting plate rotates by 90 degrees, the sliding mounting plate can slide on the rotary mounting plate after rotation to finish position adjustment in one direction, and the detector mounting plate and the flat panel detector arranged on the detector mounting plate can further slide on the sliding mounting plate to finish position adjustment in the vertical direction. Folding and two vertical position adjustments can be achieved.

The fixing module comprises a third sliding component which is arranged on the fixing plate;

The upright post is arranged on the third sliding component, and the third sliding component can drive the upright post to move.

When the stand column slides along the fixed plate, the whole moving module can move in a third direction, and the front and back, up and down, left and right direction adjustment of the detector mounting plate can be realized.

The first sliding assembly comprises a first guide rail, a first sliding block and a first driving assembly, wherein the first guide rail is arranged on the rotating mounting plate, the first sliding block is arranged on the first guide rail, the sliding mounting plate is arranged on the first sliding block, the first driving assembly is arranged between the rotating mounting plate and the sliding mounting plate, and the first driving assembly drives the sliding mounting plate to move along the direction of the first guide rail;

The second sliding assembly comprises a second guide rail, a second sliding block and a second driving assembly, the second guide rail is arranged on the sliding mounting plate, the second sliding block is arranged on the second guide rail, the detector mounting plate is arranged on the second sliding block, the second driving assembly is arranged between the sliding mounting plate and the detector mounting plate, and the second driving assembly drives the detector mounting plate to move along the direction of the second guide rail;

The third sliding assembly comprises a third guide rail, a third sliding block, a movable plate and a third driving assembly, wherein the third guide rail is arranged on the fixed plate, the third sliding block is arranged on the third guide rail, the movable plate is arranged on the third sliding block, the upright post is arranged on the movable plate, the third driving assembly is arranged between the fixed plate and the movable plate, and the third driving assembly drives the movable plate to move along the direction of the third guide rail.

Through guide rail, slider, drive assembly cooperation, can make fly leaf, sliding mounting panel, detector mounting panel slip limited and supported by the guide rail, improved control accuracy.

According to a further technical scheme, the number of the first guide rail, the second guide rail and the third guide rail is two.

According to a further technical scheme, the first sliding component comprises a first limiting device, wherein the first limiting device is arranged on a first guide rail and limits the sliding range of a first sliding block;

The second sliding component comprises a second limiting device which is arranged on the second guide rail and limits the sliding range of the second sliding block;

The third sliding component comprises a third limiting device, wherein the third limiting device is arranged on a third guide rail and limits the sliding range of a third sliding block.

The further technical scheme is that the first driving assembly comprises a driving motor, a transmission assembly, a screw rod supporting seat, a ball screw and a nut seat;

The ball screw is arranged on the screw support seat, the nut seat is arranged on the ball screw, and the transmission assembly is connected with the driving motor and the ball screw;

The second driving component and the third driving component are consistent with the first driving component in structure.

The further technical scheme is that the device comprises a rotation limiting device, wherein the rotation limiting device is arranged between the upright post and the rotation mounting plate;

The rotation limiting device limits the rotation angle of the rotation mounting plate to 90 degrees.

Because the flat panel detector only needs to have two states of working and folding when in use, the state switching can be realized by only overturning within the range of 90 degrees.

The further technical scheme is that the rotation limiting device comprises a rotation limiting block, a rotation shaft and a limiting block mounting seat;

the rotating shaft is arranged between the upright post and the rotating mounting plate, the rotating limiting block is sleeved on the rotating shaft, and the rotating limiting block is fixedly connected with the rotating shaft;

The outer surface of the rotation limiting block consists of two continuous surfaces, wherein one continuous surface is a limiting surface, and the limiting surface comprises a 90-degree cambered surface and a plane extending in the tangential direction of the 90-degree cambered surface;

the limiting block mounting seat is arranged on the rotating mounting plate, the rotating shaft penetrates through the limiting block mounting seat, and the limiting surface of the rotating limiting block is in plane butt joint with the rotating mounting plate.

The rotation limiting device comprises a rotation shaft, an angle indicating rod, a limiting rod mounting plate, a first angle limiting rod and a second angle limiting rod;

the rotating shaft is arranged between the upright post and the rotating mounting plate, the angle indicating rod is arranged at the end part of the rotating shaft, and the angle indicating rod rotates together when the rotating shaft rotates;

The first angle limiting rod and the second angle limiting rod are arranged on the limiting rod mounting plate, and an included angle of 90 degrees is formed between the first angle limiting rod and the axis of the second rotating shaft;

When the angle indicating rod is contacted with the first angle limiting rod and the second angle limiting rod, the rotation angle is limited.

Compared with the prior art, the CBCT bracket provided by the invention has the beneficial effects that the CBCT bracket has X, Y, Z translational motions in three directions and rotates around the Y direction, 4 degrees of freedom are provided, the CBCT bracket has multiple adjusting functions, and the CBCT bracket is matched with a rotation limiting device, so that the practical requirements, especially the Flash radiotherapy equipment with a treatment head far away from a roller frame, can be met. The support can be fully unfolded during working and folded and stored during non-working state.

Drawings

FIG. 1 is a schematic view of a partially expanded structure of a CBCT flip bracket;

FIG. 2 is a first schematic view of a fixed module structure;

FIG. 3 is a second schematic view of a fixed module structure;

FIG. 4 is a schematic view of a column and rotating mounting assembly;

FIG. 5 is a schematic view of a partially expanded structure of a CBCT flip bracket;

FIG. 6 is a schematic view of a slide mount assembly;

FIG. 7 is a schematic view of a fully expanded configuration of a CBCT flip bracket;

FIG. 8 is a schematic view of a folding structure of a CBCT flip bracket;

FIG. 9 is a schematic view of a first set of rotational stop arrangements;

FIG. 10 is a first schematic view of the rotation stopper;

FIG. 11 is a second schematic view of a rotational stop block limit;

Fig. 12 is a schematic structural view of a second set of rotation limiting means.

In the figure, 1-fixed module, 11-fixed plate, 12-third sliding component, 121-third guide rail, 122-third slider, 123-third limiting device, 124-movable plate, 125-third driving component, 1251-driving motor, 1252-transmission component, 1253-screw support seat, 1254-ball screw, 1255-nut seat, 2-moving module, 21-upright, 22-rotation mounting component, 221-rotation mounting plate, 222-first sliding component, 2221-first guide rail, 2222-first slider, 2223-first driving component, 2224-first limiting device, 23-rotation power device, 231-driving motor, 232-rotating gear, 233-fixed gear, 24-sliding mounting assembly, 241-sliding mounting plate, 242-second sliding assembly, 2421-second guide rail, 2422-second slide block, 2423-second driving assembly, 2424-second limiting device, 25-detector mounting plate, 3-rotation limiting device, 31-rotation limiting block, 32-rotating shaft, 33-limiting block mounting seat, 34-key slot, 35-second rotating shaft, 36-angle indicating rod, 37-limiting rod mounting plate, 38-first angle limiting rod and 39-second angle limiting rod.

Detailed Description

The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1-12, a CBCT turnover bracket comprises a fixed module 1, a movable module 2 and a rotation limiting device 3;

the fixed module 1 comprises a fixed plate 11 and a third sliding component 12, wherein the third sliding component 12 is arranged on the fixed plate 11;

The third sliding assembly 12 includes two third guide rails 121, a third slider 122, a movable plate 124, a third driving assembly 125, and a third limiting device 123, where the third limiting device 123 is mounted on the third guide rails 121 to limit the sliding range of the third slider 122;

The third guide rail 121 is mounted on the fixed plate 11, the third slider 122 is mounted on the third guide rail 121, the movable plate 124 is mounted on the third slider 122, the upright 21 is mounted on the movable plate 124, the third driving assembly 125 is mounted between the fixed plate 11 and the movable plate 124, and the third driving assembly 125 drives the movable plate 124 to move along the direction of the third guide rail 121.

The mobile module 2 comprises a stand column 21, a rotary mounting assembly 22, a rotary power device 23, a sliding mounting assembly 24 and a detector mounting plate 25;

In this embodiment, the upright 21 is mounted on the movable plate 124, and the upright 21 moves with the movable plate 124.

The rotary mounting assembly 22 comprises a rotary mounting plate 221 and a first sliding assembly 222, wherein the rotary mounting plate 221 is rotatably connected with the upright post 21, the rotary power device 23 is mounted on the rotary mounting plate 221, and the rotary power device 23 drives the rotary mounting plate 221 to rotate;

In this embodiment, the rotation power device 23 includes a driving motor 231, a rotation gear 232, and a fixed gear 233, the output end of the driving motor 231 is connected to the rotation gear 232, the rotation gear 232 and the fixed gear 233 form a gear transmission, and the fixed gear 233 is mounted on the rotation mounting plate 221, so as to realize rotation of the rotation mounting plate 221.

The first sliding assembly 222 is mounted on the rotation mounting plate 221;

The first sliding assembly 222 includes two first guide rails 2221, a first sliding block 2222, a first driving assembly 2223, and a first limiting device 2224, wherein the first guide rails 2221 are mounted on the rotation mounting plate 221, the first sliding block 2222 is mounted on the first guide rails 2221, and the first limiting device 2224 is mounted on the first guide rails 2221 to limit the sliding range of the first sliding block 2222;

The sliding mounting assembly 24 includes a sliding mounting plate 241 and a second sliding assembly 242, wherein the sliding mounting plate 241 is mounted on the first sliding assembly 222. Specifically, the sliding mounting plate 241 is mounted on the first slider 2222, the first driving assembly 2223 is mounted between the rotating mounting plate 221 and the sliding mounting plate 241, and the first driving assembly 2223 drives the sliding mounting plate 241 to move along the first guide rail 2221;

the second sliding component 242 is mounted on the sliding mounting plate 241, and the second sliding component 242 is disposed orthogonal to the first sliding component 222.

The second sliding assembly 242 includes two second rails 2421, a second slider 2422, a second driving assembly 2423, and a second limiting device 2424, the second rails 2421 are mounted on the sliding mounting plate 241, the second slider 2422 is mounted on the second rails 2421, the detector mounting plate 25 is mounted on the second slider 2422, the second driving assembly 2423 is mounted between the sliding mounting plate 241 and the detector mounting plate 25, and the second driving assembly 2423 drives the detector mounting plate 25 to move along the second rails 2421;

The second limiting device 2424 is mounted on the second guide rail 2421 to limit the sliding range of the second slider 2422;

the detector mounting plate 25 is mounted on a second sliding component 242, and the second sliding component 242 can drive the detector mounting plate 25 to move perpendicular to the sliding direction of the first sliding component 222;

The first driving assembly 2223, the second driving assembly 2423, and the third driving assembly 125 may adopt control devices such as a cylinder, an electric cylinder, and a hydraulic rod, and in this embodiment, the first driving assembly 222, the second driving assembly 2423, and the third driving assembly 125 have identical structures, see fig. 2, and include a driving motor 1251, a transmission assembly 1252, a screw support seat 1253, a ball screw 1254, and a nut seat 1255;

The ball screw 1254 is mounted on the screw support seat 1253, the nut seat 1255 is mounted on the ball screw 1254, and the transmission assembly 1252 is connected with the driving motor 1251 and the ball screw 1254;

The drive assembly 1252 may be a belt drive, a chain drive, or the like, and in this embodiment, the drive assembly 1252 is a gear drive.

Referring to fig. 9, the rotation limiting device 3 is installed between the upright post 21 and the rotation mounting plate 221, and is mainly used for limiting the rotation angle of the mobile module 2.

The rotation limiting means 3 limits the rotation angle of the rotation mounting plate 221 to 90 °.

The rotation limiting device 3 can adopt a stop block, a rotation connecting rod and the like to realize a limiting effect;

In this embodiment, the rotation limiting device 3 has two sets, which are respectively disposed on two rotation shafts,

The first set of limiting device comprises a rotation limiting block 31, a first rotation shaft 32 and a limiting block mounting seat 33;

The first rotating shaft 32 is provided with a fixed gear 233, the first rotating shaft 32 is disposed between the upright 21 and the rotating mounting plate 221, the rotating limiting block 31 is sleeved on the first rotating shaft 32, and the rotating limiting block 31 is fixedly connected with the first rotating shaft 32, and the fixed connection can be in a bolt connection, a screw connection, a key slot connection or the like.

In this embodiment, the rotation stopper 31 is connected to the first rotation shaft 32 through a key slot, and the key slot 34 is disposed on the stopper 31.

The outer surface of the rotation limiting block 31 is composed of two continuous surfaces, wherein one continuous surface is a limiting surface, and the limiting surface comprises a 90-degree cambered surface and a plane extending in the tangential direction of the 90-degree cambered surface, as shown in fig. 10;

the stopper mount pad 33 is disposed on the rotation mount plate 221, the rotation stopper 31 is mounted in the stopper mount pad 33, the limiting surface of the rotation stopper 31 is abutted to the plane of the rotation mount plate 221, and when the plane extending to the tangent direction of the cambered surface is abutted to the stopper, the rotation stopper 31 completes the limiting, see fig. 11.

The second set of limiting devices comprises a second rotating shaft 35, an angle indicating rod 36, a limiting rod mounting plate 37, a first angle limiting rod 38 and a second angle limiting rod 39;

The second rotating shaft 35 is arranged between the other upright post and the rotating mounting plate 221, the angle indicating rod 36 is arranged at the end part of the rotating shaft, and when the second rotating shaft 35 rotates, the angle indicating rod 36 rotates together;

The first angle limiting rod 38 and the second angle limiting rod 39 are arranged on the limiting rod mounting plate 37, and the first angle limiting rod 38 and the second angle limiting rod 39 form an included angle of 90 degrees with the axis of the second rotating shaft 35;

When the angle indicating rod 36 contacts the first angle limiting rod 38 and the second angle limiting rod 39, the rotation angle is limited.

In this embodiment, the first angle limiting bar 38 and the second angle limiting bar 39 form an angle of 90 ° with the axis of the second mounting shaft 35, so that the rotation of the rotation mounting plate 221 cannot be more than 90 °. When the angle indicating bar 36 moves to the first angle limiting bar 38 or the second angle limiting bar 39 position, the rotational mounting plate 221 is not rotated any more.

The specific working process is that when the rotary mounting plate 221 is completely contained, the angle indicating rod 36 is positioned at the first angle limiting rod 38, and as the rotary mounting plate 221 is continuously unfolded, the angle indicating rod 36 gradually rotates towards the second angle limiting rod 39, when the angle indicating rod 36 rotates to the second angle limiting rod 39, the rotary mounting plate 221 is unfolded at the 90-degree position, at the moment, the rotary power device 23 stops driving, and the rotary mounting plate 221 does not continue to rotate. Similarly, when the rotation mounting plate 221 is unfolded completely at 90 degrees, the angle indicating rod 36 is located at the second angle limiting rod 39, and as the rotation mounting plate 221 is continuously stored, the angle indicating rod 36 gradually rotates towards the first angle limiting rod 38, and when the angle indicating rod 36 rotates to the first angle limiting rod 38, the rotation mounting plate 221 is stored at the 0-degree position, at this time, the rotation power device 23 stops driving, and the rotation mounting plate 221 does not continue to rotate.

In the non-operating state, referring to fig. 8, when the mobile module 2 is to be operated, it is rotated to be perpendicular to the fixed module 1, then the mobile module 2 is moved from the left end to the right end, and then the sliding mounting plate 241 is sequentially extended. If the full field irradiation is performed, the detector mounting plate does not act, so that the detector mounting plate is opposite to the bulb tube beam, and the full field irradiation can be realized by completely irradiating the bulb tube beam on the flat panel detector. If half field illumination is desired, the detector mounting plate 25 is adjusted so that only half of the bulb beam impinges on the flat panel detector, and half field illumination is achieved, see FIG. 7. The detector mounting plate 25 can translate in the Y direction to accurately realize full-field and half-field irradiation.

When the adjustment in the X direction is required, the movable plate 124 on the fixed module 1 can drive the movable module 2 to adjust in the X direction.

Although the application has been described herein with reference to illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure. More specifically, various modifications and improvements may be made to the component parts and/or arrangements of the subject combination layout within the scope of the disclosure. In addition to variations and modifications in the component parts and/or arrangements, other uses will be apparent to those skilled in the art.

Claims (9)

1. The CBCT overturning bracket is characterized by comprising a fixed module and a movable module;

the fixing module comprises a fixing plate;

The moving module comprises a stand column, a rotating installation assembly, a rotating power device, a sliding installation assembly and a detector installation plate;

The upright post is arranged on the fixed module;

the rotary mounting assembly comprises a rotary mounting plate and a first sliding assembly, wherein the rotary mounting plate is rotatably connected with the upright post, the rotary power device is mounted on the rotary mounting plate and drives the rotary mounting plate to rotate, and the first sliding assembly is mounted on the rotary mounting plate;

the sliding installation assembly comprises a sliding installation plate and a second sliding assembly, wherein the sliding installation plate is installed on the first sliding assembly, and the first sliding assembly can drive the sliding installation assembly to move;

the detector mounting plate is mounted on the second sliding assembly, and the second sliding assembly can drive the detector mounting plate to move perpendicular to the sliding direction of the first sliding assembly.

2. The CBCT rollover bracket as recited in claim 1, wherein the fixation module includes a third sliding assembly, the third sliding assembly being mounted on the fixation plate;

The upright post is arranged on the third sliding component, and the third sliding component can drive the upright post to move.

3. The CBCT turnover bracket of claim 2, wherein the first sliding component comprises a first guide rail, a first slider and a first driving component, the first guide rail is installed on the rotating mounting plate, the first slider is installed on the first guide rail, the sliding mounting plate is installed on the first slider, the first driving component is installed between the rotating mounting plate and the sliding mounting plate, and the first driving component drives the sliding mounting plate to move along the direction of the first guide rail;

The second sliding assembly comprises a second guide rail, a second sliding block and a second driving assembly, the second guide rail is arranged on the sliding mounting plate, the second sliding block is arranged on the second guide rail, the detector mounting plate is arranged on the second sliding block, the second driving assembly is arranged between the sliding mounting plate and the detector mounting plate, and the second driving assembly drives the detector mounting plate to move along the direction of the second guide rail;

The third sliding assembly comprises a third guide rail, a third sliding block, a movable plate and a third driving assembly, wherein the third guide rail is arranged on the fixed plate, the third sliding block is arranged on the third guide rail, the movable plate is arranged on the third sliding block, the upright post is arranged on the movable plate, the third driving assembly is arranged between the fixed plate and the movable plate, and the third driving assembly drives the movable plate to move along the direction of the third guide rail.

4. A CBCT flip bracket as in claim 3, wherein the number of first rail, second rail and third rail is two.

5. A CBCT flip bracket as claimed in claim 3, wherein the first sliding assembly includes a first stop means mounted on the first rail to limit the sliding range of the first slider;

The second sliding component comprises a second limiting device which is arranged on the second guide rail and limits the sliding range of the second sliding block;

The third sliding component comprises a third limiting device, wherein the third limiting device is arranged on a third guide rail and limits the sliding range of a third sliding block.

6. A CBCT tilting bracket according to claim 3, wherein the first drive assembly comprises a drive motor, a transmission assembly, a screw support, a ball screw, a nut mount;

The ball screw is arranged on the screw support seat, the nut seat is arranged on the ball screw, and the transmission assembly is connected with the driving motor and the ball screw;

the second driving assembly and the third driving assembly are consistent with the first driving assembly in structure.

7. A CBCT turnover bracket as claimed in any one of claims 1 to 6 and comprising a rotation limiting means mounted between the upright and the rotation mounting plate;

The rotation limiting device limits the rotation angle of the rotation mounting plate to 90 degrees.

8. The CBCT turnover bracket of claim 7, wherein the rotation limiting device comprises a rotation limiting block, a rotation shaft and a limiting block mounting seat;

the rotating shaft is arranged between the upright post and the rotating mounting plate, the rotating limiting block is sleeved on the rotating shaft, and the rotating limiting block is fixedly connected with the rotating shaft;

The outer surface of the rotation limiting block consists of two continuous surfaces, wherein one continuous surface is a limiting surface, and the limiting surface comprises a 90-degree cambered surface and a plane extending in the tangential direction of the 90-degree cambered surface;

the limiting block mounting seat is arranged on the rotating mounting plate, the rotating shaft penetrates through the limiting block mounting seat, and the limiting surface of the rotating limiting block is in plane butt joint with the rotating mounting plate.

9. The CBCT turnover bracket of claim 7, wherein the rotation limiting device comprises a rotation shaft, an angle indication rod, a limiting rod mounting plate, a first angle limiting rod, a second angle limiting rod;

the rotating shaft is arranged between the upright post and the rotating mounting plate, the angle indicating rod is arranged at the end part of the rotating shaft, and the angle indicating rod rotates together when the rotating shaft rotates;

The first angle limiting rod and the second angle limiting rod are arranged on the limiting rod mounting plate, and an included angle of 90 degrees is formed between the first angle limiting rod and the axis of the second rotating shaft;

When the angle indicating rod is contacted with the first angle limiting rod and the second angle limiting rod, the rotation angle is limited.