Dose compensation external hanging device suitable for proton radiotherapy fixed bed board

Abstract

The invention discloses a dose compensation external hanging device suitable for a proton radiotherapy fixed bed board, and relates to the technical field of proton radiotherapy, and the dose compensation external hanging device comprises a bed board body, the lower side of the bed board body is provided with a compensation modulation body, the compensation modulation body is internally provided with a hollow cavity, and the interior of the hollow cavity is rotatably connected with a radiation modulation sheet. Lock catch structures are mounted on the two sides of the bed board body and are used for fixing the position between the bed board body and the compensation modulation body; by arranging a lock catch structure, an elastic buckle in the lock catch structure is matched with a first arc-shaped block and a second arc-shaped block, rapid locking and dismounting of the device are achieved, the clinical operation efficiency is greatly improved, an adjusting structure is additionally arranged on the basis of the lock catch structure, and when the compensation modulation body and the bed board body are locked, a transmission rod can be rotated, so that the compensation modulation body and the bed board body are locked. Therefore, a gear-rack transmission and lock catch linkage structure is realized, the continuous and accurate adjustment of the angle of the radiation modulation sheet is realized, and the flexibility of dose control is improved.

Description

Technical Field

[0001] This invention relates to the field of proton radiotherapy technology, specifically a dose compensation external device suitable for a fixed bed board in proton radiotherapy. Background Technology

[0002] Proton therapy is a high-precision radiotherapy technique. Its advantage lies in the Bragg peak characteristic of proton beams within the human body, enabling high-dose irradiation of the tumor area while maximally protecting surrounding normal tissues. During proton therapy, a dose compensation device is often installed between the patient and the radiation source to achieve precise control of the dose distribution.

[0003] In existing technologies, dose compensation devices are mostly fixed compensation blocks or simple modulators, which have the following problems: First, the installation and positioning accuracy is not high, affecting the repeatability of dose compensation; second, the adjustment method is crude, making real-time fine-tuning during treatment impossible; and third, there is a lack of a rapid integration and locking mechanism with the treatment bed, making operation cumbersome and affecting treatment efficiency. Therefore, those skilled in the art have provided a dose compensation external device suitable for proton radiotherapy fixed bed boards to solve the problems mentioned in the background art. Summary of the Invention

[0004] The purpose of this invention is to provide a dose compensation attachment device suitable for proton radiotherapy fixation bed boards, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A dose compensation attachment device suitable for a proton therapy fixation bed includes a bed body, a compensation modulation body disposed on the lower side of the bed body, a hollow cavity formed inside the compensation modulation body, a radiation modulation plate rotatably connected inside the hollow cavity, locking structures installed on both sides of the bed body to fix the position between the bed body and the compensation modulation body, and adjustment structures formed on both sides of the compensation modulation body to adjust the angle of the radiation modulation plate.

[0006] As a further embodiment of the present invention: wedge-shaped surfaces and arc-shaped surfaces are respectively provided on both sides of the compensation modulation body, and the wedge-shaped surfaces are in contact with the wedge surfaces of the bed board body.

[0007] As a further embodiment of the present invention: the locking structure includes a locking box, which is bolted to the bed board body. A connecting frame is slidably connected inside the locking box, and a knob is rotatably connected inside the locking box. A first protrusion and a second protrusion are fixedly connected to the knob. Two plug-in blocks are provided below the connecting frame, and symmetrical elastic buckles are fixedly connected to the lower side of the plug-in blocks.

[0008] As a further embodiment of the present invention, the length of the first protrusion is two-thirds of the length of the second protrusion.

[0009] As a further embodiment of the present invention: the adjusting structure includes an adjusting groove, the adjusting groove having symmetrical insertion slots, two sets of secondary gears being rotatably connected inside the adjusting groove, a connecting rod being fixedly connected to the upper side of the secondary gears, a first arc-shaped block being fixedly connected to the upper side of the connecting rod, and a second arc-shaped block being slidably connected to the connecting rod.

[0010] As a further embodiment of the present invention: wherein the plug-in block penetrates the plug-in slot and the elastic buckle is a mating component with both the first arc-shaped block and the second arc-shaped block.

[0011] As a further embodiment of the present invention: the adjustment structure further includes a main gear, which is fixedly connected to the radiation modulation plate. A main gear plate is meshed on the lower side of the main gear, and the main gear plate is slidably connected to the adjustment groove. Secondary gear plates are fixedly connected to both sides of the main gear plate, and the secondary gear plates mesh with the secondary gear.

[0012] As a further embodiment of the present invention: a transmission rod is rotatably connected to the connecting frame, the transmission rod is fixedly connected to the plug block, and the other end of the transmission rod passes through the locking box and is sleeved with a return spring.

[0013] As a further embodiment of the present invention: the locking box is engraved with a circumferential angle, and a pointer is installed at the top of the transmission rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By compensating for the fit between the wedge-shaped surface of the modulation body and the bed plate body, the device can be quickly positioned and repeatedly installed, ensuring the positional accuracy of dose compensation.

[0015] 2. By incorporating a locking structure, the elastic buckle in the locking structure, in conjunction with the first and second arc-shaped blocks, enables the device to be quickly locked and disassembled, greatly improving the efficiency of clinical operations.

[0016] 3. Based on the locking structure, an adjustment structure has been added. When the compensation modulation body and the bed plate body are locked, the transmission rod can be rotated to realize the gear-rack transmission and locking linkage structure, so as to realize the continuous and precise adjustment of the radiation modulation plate angle and improve the flexibility of dose control. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of the bed board body structure in this invention; Figure 3 This is a schematic diagram of the compensation modulation body structure in this invention; Figure 4 This is a schematic diagram of the adjusting groove structure in this invention; Figure 5 This is a schematic diagram of the engagement between the elastic buckle and the first arc-shaped block in an embodiment of the present invention; Figure 6 This is a schematic diagram of the elastic buckle and the second arc-shaped block clamping in an embodiment of the present invention; Figure 7 This is a schematic diagram of the auxiliary gear structure in this invention; Figure 8 This is a schematic diagram of the transmission rod structure in this invention; Figure 9 This is a schematic diagram of the locking structure in this invention; The correspondence between the labels and component names in the attached figures is as follows: 1. Bed board body; 2. Compensation and modulation body; 201. Hollow cavity; 202. Radiation modulation plate; 203. Wedge-shaped surface; 204. Arc-shaped surface; 3. Locking structure; 301. Locking box; 302. Transmission rod; 303. Return spring; 304. Connecting frame; 305. Insertion block; 306. Knob; 307. First protrusion; 308. Second protrusion; 309. Elastic buckle; 4. Adjustment structure; 401. Adjustment groove; 402. Insertion groove; 403. Secondary gear; 404. Connecting rod; 405. First arc-shaped block; 406. Secondary arc-shaped block; 407. Main gear plate; 408. Main gear; 409. Secondary gear plate. Detailed Implementation

[0018] Please see Figures 1-9 A dose compensation attachment device suitable for a proton radiotherapy fixed bed board includes a bed board body 1, a compensation modulation body 2 disposed on the lower side of the bed board body 1, and wedge-shaped surfaces 203 and arc-shaped surfaces 204 disposed on both sides of the compensation modulation body 2, with the wedge-shaped surfaces 203 fitting against the wedge surfaces of the bed board body 1; the compensation modulation body 2 is made of a material (usually plexiglass or PMMA) for dose modulation and compensation of the proton beam, and the wedge-shaped surfaces 203 fitting against the bed board enable rapid and accurate positioning of the device, ensuring that its treatment position relative to the bed board and the proton beam is fixed and repeatable, and the arc-shaped surfaces 204 may be used to avoid the patient's body or other equipment, or to reduce the risk of collision during scanning, thus optimizing the physical shape of the device.

[0019] The compensation modulation body 2 has a hollow cavity 201 inside, and a radiation modulation plate 202 is rotatably connected inside the hollow cavity 201. Locking structures 3 are installed on both sides of the bed board body 1, fixing the position between the bed board body 1 and the compensation modulation body 2. The locking structure 3 includes a locking box 301, which is bolted to the bed board body 1. A connecting frame 304 is slidably connected inside the locking box 301, and a knob 306 is rotatably connected inside the locking box 301. A first protrusion 307 and a second protrusion 308 are fixedly connected to the knob 306. Two insertion blocks 305 are provided below the connecting frame 304, and symmetrical elastic buckles 309 are fixedly connected to the lower side of the insertion blocks 305. The length of the first protrusion 307 is two-thirds the length of the second protrusion 308. An adjustment structure 4 adjusts the angle of the radiation modulation plate 202. The adjustment structure 4 includes an adjustment groove 401, on which symmetrical insertion grooves 4 are provided. 02. Two sets of secondary gears 403 are rotatably connected inside the adjusting groove 401. A connecting rod 404 is fixedly connected to the upper side of the secondary gear 403. A first arc-shaped block 405 is fixedly connected to the upper side of the connecting rod 404. A second arc-shaped block 406 is slidably connected to the connecting rod 404. The insertion block 305 passes through the insertion groove 402, and the elastic buckle 309, the first arc-shaped block 405, and the second arc-shaped block 406 are all mating components. In this embodiment, when it is necessary to fix the compensation modulation body 2 in... When the bed board body 1 is positioned below the bed board body 1, first, make the compensation modulation body 2 fit against the wedge surface of the bed board body 1. Then, rotate the knob 306. When the first protrusion 307 on the knob 306 contacts the connecting frame 304, the force generated will cause the connecting frame 304 to move downward, thereby causing the insertion block 305 to be inserted into the insertion slot 402, until the elastic buckle 309 fits against the first arc-shaped block 405, until the elastic buckle 309 is completely engaged with the bottom side (plane) of the first arc-shaped block 405. Figure 5 The elastic buckle 309 and the first arc-shaped block 405 work together to effectively fix the relative position between the compensation modulation body 2 and the bed board body 1, so that the compensation modulation body 2 and the bed board body 1 will not separate.

[0020] Furthermore, when the knob 306 is rotated to the point where the first protrusion 307 lifts the connecting frame 304, the device is in a preliminary locked state. At this time, the elastic buckle 309 engages with the flat bottom side of the first arc-shaped block 405, which is sufficient to resist gravity and conventional external forces, ensuring that the compensation modulation body 2 will not fall off, and laying the foundation for the linkage and cooperation with the subsequent adjustment structure 4.

[0021] Specifically, such as Figure 6As shown, when the knob 306 is rotated to make the second protrusion 308 contact the connecting frame 304, because the length of the second protrusion 308 is greater than that of the first protrusion 307, the downward distance of the insertion block 305 increases until the elastic buckle 309 on the insertion block 305 contacts the second arc-shaped block 406. Because the bottom side of the elastic buckle 309 is provided with a wedge surface, the elastic buckle 309 will separate towards both ends when it contacts the second arc-shaped block 406 until it is clamped to both sides of the second arc-shaped block 406. Continuing to rotate the knob 306, when the second protrusion 308 gradually disengages from the connecting frame 304... The plug-in block 305 will gradually move upward, and the clamped second arc-shaped block 406 will also move upward under the action of the elastic buckle 309 until the second arc-shaped block 406 and the first arc-shaped block 405 are in contact. When the upward resistance of the second arc-shaped block 406 is greater than the clamping force applied by the elastic buckle 309 to the second arc-shaped block 406, the elastic buckle 309 will gradually move upward, and the elastic buckle 309 will not encounter any obstruction when moving upward, so that the elastic buckle 309 completely disengages from the second arc-shaped block 406 and the first arc-shaped block 405, and completes the disassembly process between the compensation modulation body 2 and the bed board body 1.

[0022] Specifically, the elastic buckle 309 is an elastic component with an outwardly inclined wedge or conical surface at the lower end. It is this wedge surface that allows it to be squeezed and elastically opened to both sides when in contact with the second arc-shaped block 406, thereby achieving clamping. The bottom side of the first arc-shaped block 405 is a plane suitable for engagement, while the side of the second arc-shaped block 406 is a surface with anti-slip texture suitable for being clamped by the elastic buckle 309.

[0023] like Figure 4 and Figure 5As shown, adjustment structures 4 are provided on both sides of the compensation modulation body 2. The adjustment structure 4 also includes a main gear 408, which is fixedly connected to the radiation modulation plate 202. A main gear plate 407 is meshed on the lower side of the main gear 408. The main gear plate 407 is slidably connected to the adjustment groove 401. A secondary gear plate 409 is fixedly connected to both sides of the main gear plate 407. The secondary gear plate 409 meshes with the secondary gear 403. A transmission rod 302 is rotatably connected to the connecting frame 304. The transmission rod 302 is fixedly connected to the plug block 305. The other end of the transmission rod 302 passes through the locking box 301 and is sleeved with a return spring 303. In the embodiment, when the elastic buckle 309 is engaged with the bottom side of the first arc-shaped block 405, the transmission rod 302 is rotated. At this time, the transmission rod 302 is engaged with the return spring 303. 3. Under the applied elastic force, the elastic buckle 309 is tightly engaged with the bottom side of the first arc-shaped block 405. When the transmission rod 302 rotates, it drives the first arc-shaped block 405 to rotate through the plug block 305. When the first arc-shaped block 405 rotates, it drives the secondary gear 403 to rotate through the connecting rod 404. When the secondary gear 403 rotates, it drives the secondary gear plate 409 and the main gear plate 407 to move. When the main gear plate 407 moves, it drives the main gear 408 to rotate. When the main gear 408 rotates, it drives the radiation modulation plate 202 to rotate by an angle. Thus, by changing the tilt angle of this modulation material, the effective material thickness of the proton beam penetration can be continuously changed. According to the Bragg peak principle, different material thicknesses will reduce the proton energy to different degrees, thereby changing its penetration depth and achieving fine adjustment of the dose distribution.

[0024] Furthermore, when the return spring 303 is in a compressed state (when the connecting frame 304 moves down), its elastic force continuously acts on the elastic buckle 309 through the transmission rod 302 and the plug block 305, so that it is always pressed tightly against the bottom side of the first arc-shaped block 405 (the first arc-shaped block 405 is provided with anti-slip texture or groove), thereby ensuring that the power can be reliably transmitted when the transmission rod 302 is rotated for adjustment, preventing slippage, and ensuring the accuracy and stability of adjustment.

[0025] Specifically, the locking box 301 is engraved with circumferential angles, and a pointer is installed at the top of the transmission rod 302. Since the rotation of the transmission rod 302 is strictly linked with the action of the user's operating knob 306 and the position of the internal protrusion, the position of the pointer at its top can accurately reflect the state of the entire adjustment system. The pointer points to the circumferential angle scale on the locking box 301, allowing the operator to quantitatively and repeatably set and read the current angle of the radiation modulation plate 202, thereby digitizing and standardizing the dose compensation adjustment process, greatly improving the accuracy and repeatability of the treatment.

[0026] Working principle: During installation, the wedge-shaped surface 203 of the compensation modulation body 2 is aligned and fitted with the wedge-shaped surface of the bed board body 1. Rotating the knob 306 causes the first protrusion 307 to lift the connecting frame 304, which in turn moves the plug block 305 downward, allowing the elastic buckle 309 to engage with the bottom plane of the first arc-shaped block 405, thus fixing the position of the compensation modulation body 2 and the bed board body 1. Based on this, rotating the transmission rod 302 drives the first arc-shaped block 405 to rotate through the plug block 305. This rotation is then transmitted through the connecting rod 404, the secondary gear 403, the secondary gear plate 409, and the main gear plate 407, ultimately driving the main gear 408 and the radiation modulation plate 202 to rotate, thereby achieving precise control of the dose modulation angle. The pointer and dial work together to visualize the angle. When disassembly is required, rotate the knob 306. As the second protrusion 308 gradually disengages from the connecting frame 304, the plug block 305 will gradually move upward. The clamped second arc-shaped block 406 will also move upward under the action of the elastic buckle 309 until the second arc-shaped block 406 connects with the first arc-shaped block 405. When the upward resistance of the second arc-shaped block 406 is greater than the clamping force applied by the elastic buckle 309 to the second arc-shaped block 406, the elastic buckle 309 will gradually move upward without encountering any obstruction. This allows the elastic buckle 309 to completely disengage from the second arc-shaped block 406 and the first arc-shaped block 405, completing the disassembly process between the compensation modulation body 2 and the bed board body 1.

[0027] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A dose compensation attachment device suitable for a proton radiotherapy fixation bed, comprising a bed body (1), characterized in that, A compensation modulation body (2) is provided on the lower side of the bed board body (1). A hollow cavity (201) is provided inside the compensation modulation body (2). A radiation modulation plate (202) is rotatably connected inside the hollow cavity (201). A locking structure (3) is installed on both sides of the bed board body (1). The locking structure (3) fixes the position between the bed board body (1) and the compensation modulation body (2). An adjustment structure (4) is provided on both sides of the compensation modulation body (2). The adjustment structure (4) adjusts the angle of the radiation modulation plate (202).

2. The dose compensation external attachment device suitable for proton radiotherapy fixation bed as described in claim 1, characterized in that, The compensation modulation body (2) has a wedge-shaped surface (203) and an arc-shaped surface (204) on both sides respectively, and the wedge-shaped surface (203) is in contact with the wedge surface of the bed board body (1).

3. The dose compensation external attachment device suitable for proton radiotherapy fixation bed as described in claim 1, characterized in that, The locking structure (3) includes a locking box (301), which is bolted to the bed board body (1). A connecting frame (304) is slidably connected inside the locking box (301), and a knob (306) is rotatably connected inside the locking box (301). A first protrusion (307) and a second protrusion (308) are fixedly connected to the knob (306). Two plug-in blocks (305) are provided below the connecting frame (304), and symmetrical elastic buckles (309) are fixedly connected to the lower side of the plug-in blocks (305).

4. The dose compensation external attachment device suitable for proton radiotherapy fixation bed as described in claim 3, characterized in that, The length of the first bump (307) is two-thirds the length of the second bump (308).

5. The dose compensation external attachment device suitable for proton radiotherapy fixation bed as described in claim 4, characterized in that, The adjustment structure (4) includes an adjustment groove (401), on which symmetrical insertion grooves (402) are provided. Two sets of auxiliary gears (403) are rotatably connected inside the adjustment groove (401). A connecting rod (404) is fixedly connected to the upper side of the auxiliary gear (403). A first arc-shaped block (405) is fixedly connected to the upper side of the connecting rod (404). A second arc-shaped block (406) is slidably connected to the connecting rod (404).

6. The dose compensation external attachment device suitable for proton radiotherapy fixation bed as described in claim 5, characterized in that, The plug block (305) passes through the plug slot (402), and the elastic buckle (309) is a mating component with the first arc block (405) and the second arc block (406).

7. A dose compensation external attachment device suitable for proton radiotherapy fixation bed as described in claim 5, characterized in that, The adjustment structure (4) further includes a main gear (408), which is fixedly connected to the radiation modulation plate (202). A main gear plate (407) is meshed on the lower side of the main gear (408). The main gear plate (407) is slidably connected to the adjustment groove (401). A secondary gear plate (409) is fixedly connected to both sides of the main gear plate (407). The secondary gear plate (409) meshes with the secondary gear (403).

8. A dose compensation external attachment device suitable for proton radiotherapy fixation bed as described in claim 7, characterized in that, A transmission rod (302) is rotatably connected to the connecting frame (304). The transmission rod (302) is fixedly connected to the plug block (305). The other end of the transmission rod (302) passes through the lock box (301) and is sleeved with a return spring (303).

9. A dose compensation attachment device suitable for a proton radiotherapy fixation bed as described in claim 8, characterized in that, The locking box (301) is engraved with circumferential angles, and a pointer is installed at the top of the transmission rod (302).

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