A stable rotating gantry for proton therapy

Abstract

The application discloses a stable rotary gantry for proton therapy, and relates to the field of proton medical devices, which comprises a set of front rings and rear rings symmetrically distributed left and right, the outer diameters of the front rings and the rear rings are the same, a front cylinder is mounted on the right side of the front ring, a rear cylinder is mounted on the left side of the rear ring, a stable connecting mechanism is arranged between the front cylinder and the rear cylinder, a beam mechanism is mounted outside the stable connecting mechanism, and a radiation assembly is mounted below the beam mechanism. The stable rotary gantry for proton therapy forms a frame mounting structure through cooperation of a first mounting frame, a second mounting frame and a connecting frame, the support structure formed by the first mounting frame and the second mounting frame can be separately disassembled in a modular manner, the beam mechanism can be connected and mounted with the connecting frame, the beam mechanism and other related wire harnesses can be conveniently overhauled and checked by disassembling the first mounting frame and the second mounting frame in local positions, and the subsequent overhauling and maintenance of the equipment are facilitated.

Description

Technical Field

[0001] This invention relates to the field of proton therapy device technology, specifically a stable rotating gantry for proton therapy. Background Technology

[0002] Proton therapy, as an advanced radiotherapy method, utilizes the physical properties of proton beams to precisely deposit high doses of radiation energy onto the tumor site, minimizing damage to surrounding healthy tissues. During proton therapy, after the protons enter the body, they form a sharp dose peak at the end of their range, called the Bragg peak. By modulating the energy to broaden the Bragg peak, it can be made to cover the tumor. The rotating gantry, as one of the key components of the equipment, enables the proton beam to irradiate the tumor from different angles, improving the treatment effect.

[0003] Prior art 1 (Chinese patent application No. CN202223020240.7, published on July 28, 2023) discloses a rotating frame, comprising a pair of opposing support roller assemblies and a roller assembly that rolls on the pair of support roller assemblies. The roller assembly includes a pair of support rings corresponding to the pair of support roller assemblies, and a plurality of trusses are detachably connected between the pair of support rings. The rollers of this rotating frame, through the adoption of a truss structure design, are lightweight, reducing the operating load, and the detachable truss structure facilitates transportation. Furthermore, the supporting roller assembly is a self-aligning structure, which can reduce the processing and installation accuracy requirements of the roller assembly and save equipment costs; Existing technology 2 (Chinese patent application number CN202111559899.7, published on March 4, 2022) includes a proton therapy rotating gantry, comprising a unit, the unit including a structural component, a maintenance component, and a beam component, the structural component and the unit being movably connected, the maintenance component and the beam component being fixedly connected to the unit, the maintenance component being disposed inside the structural component, and the beam component being disposed outside the structural component. In actual use, by starting the unit, the rotation of some structures inside the structural component is controlled, and the accelerated proton beam is transmitted to the inside of the unit using the beam component for patient treatment. In addition, when some structures in the unit are damaged or require regular maintenance, the unit can be quickly maintained through the maintenance component.

[0004] Currently, rotating racks are typically designed as a single unit, housing components such as beam lines and control boxes. This makes maintenance and repair difficult due to the rack's obstruction, and dismantling the rack is a significant undertaking. It is also inconvenient to dismantle parts of the rack or replace damaged sections individually, which is detrimental to the long-term use of the equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a stable rotating gantry for proton therapy, in order to solve the problems mentioned in the background art. In current rotating gantry systems, the gantry enclosure structure is generally an integral set, and the gantry also houses beam lines, control boxes, and other related structures. During maintenance, the gantry obstructs the view, increasing the difficulty of maintenance. Furthermore, the dismantling of the gantry is a large-scale operation, making it inconvenient to dismantle parts of the gantry, and it is also inconvenient to replace damaged parts of the gantry individually.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a stable rotating gantry for proton therapy, comprising a set of symmetrically distributed front and rear rings, the front and rear rings having the same outer diameter, a front cylinder mounted on the right side of the front ring, and a rear cylinder mounted on the left side of the rear ring, a stable connecting mechanism provided between the front and rear cylinders, a beam mechanism mounted outside the stable connecting mechanism, and a radiation assembly mounted below the beam mechanism, the stable connecting mechanism comprising a first mounting frame and a second mounting frame, the center distances of the first and second mounting frames from the center distance of the front ring being equal, and a connecting frame fixed between the first and second mounting frames, the beam mechanism being mounted outside the connecting frame, the first and second mounting frames and the connecting frame forming a frame, and a docking mounting mechanism provided at the ends of the first and second mounting frames to connect the first and second mounting frames to the front and rear cylinders.

[0007] To further optimize this technical solution, the first mounting bracket, the second mounting bracket, and the connecting bracket are distributed at equal angles with the center of the front cylinder as the center, and the distance between the second mounting bracket and the adjacent first mounting bracket is equal.

[0008] To further optimize this technical solution, a bonding head is provided between the first mounting bracket and the second mounting bracket, and a connecting groove is provided inside the bonding head. A fixing block is fixed to the inner end of the bonding head. The bonding head and the fixing block connect the adjacent first mounting bracket and second mounting bracket that are not connected by a connecting bracket. The positions of the fixing block and the connecting bracket are staggered.

[0009] To further optimize this technical solution, both the interior of the first mounting bracket and the interior of the second mounting bracket are provided with a connection locking mechanism. The first mounting bracket and the second mounting bracket are connected through the connection locking mechanism and the connection groove in the fitting head, respectively.

[0010] To further optimize this technical solution, the docking and installation mechanism includes an installation head, an adjusting rod, an auxiliary head, and a positioning mechanism; Mounting heads are located at the left and right ends of the first and second mounting brackets; An adjusting rod is fixed to the inner end of the mounting head, and the inner end of the adjusting rod is located inside the first mounting bracket and the second mounting bracket, forming a threaded connection with them; An auxiliary head, fixed to the surface of the adjusting rod, controls the rotation of the adjusting rod; The positioning mechanism is located inside the front and rear cylinders and is connected to the mounting head.

[0011] To further optimize this technical solution, the positioning mechanism includes a mounting block and a docking groove; The mounting blocks are distributed at equal angles inside the front and rear cylinders; A mating groove is formed on the surface of the mounting block, and a threaded connection is formed between the mating groove and the mounting head.

[0012] To further optimize this technical solution, the mounting block, the front cylinder, and the rear cylinder form a left-right sliding structure, and an elastic buffer pad is fixed on the outside of the mounting block. The elastic buffer pad is fixedly connected to the front cylinder and the rear cylinder respectively.

[0013] To further optimize this technical solution, the bonding head, the first mounting bracket, and the second mounting bracket are respectively configured with a horizontal sliding structure, so that the bonding head can be moved away from the outside of the first mounting bracket and the second mounting bracket.

[0014] To further optimize this technical solution, the connection locking mechanism includes a connecting block, a return spring, and an automatic release mechanism; A connecting block is disposed inside the first mounting bracket and the second mounting bracket, and the connecting block, the first mounting bracket, and the second mounting bracket form a telescopic structure; A return spring is provided on the outside of the connecting block to provide thrust to the connecting block, so that the connecting block moves into the first mounting bracket and the second mounting bracket. The return spring is made of non-metallic material. The automatic release mechanism is set at the inner end of the connecting block to control its movement.

[0015] To further optimize this technical solution, the automatic release mechanism is composed of a trigger block. The inner ends of the trigger block and the connecting block are in contact, and the surface of the trigger block is designed with an inclined structure. The trigger block, the first mounting bracket, and the second mounting bracket respectively form a horizontal sliding structure. At the same time, the trigger block and the inner end of the adjusting rod are rotatably connected.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) The frame installation structure is formed by the first mounting frame and the second mounting frame in conjunction with the connecting frame. The support structure formed by the first mounting frame and the second mounting frame can be disassembled separately in a modular manner. The beam mechanism can be connected and installed with the connecting frame. By disassembling the first mounting frame and the second mounting frame in a local position, it is also convenient to inspect and check the beam mechanism and other related wire harnesses, which is beneficial to the subsequent maintenance of the equipment.

[0017] (2) The outer shape adopts a cylindrical structure, with front and rear rings of the same outer diameter to improve the centering accuracy of the rotating frame. The first and second mounting brackets are detachably connected to the front and rear cylinders, which facilitates the maintenance of the frame interior.

[0018] (3) The adjacent first and second mounting brackets are connected by the bonding head and the fixing block to improve the overall stability of the frame. The bonding head can slide on the first and second mounting brackets. Subsequently, by releasing the connection between the mounting head and the mounting block, the mounting head is retracted and can be moved to the outer end of the first and second mounting brackets, thereby removing the first and second mounting brackets from the inside of the bonding head.

[0019] (4) The movement of the mounting head can be controlled synchronously by the rotation of the adjusting rod, so that the mounting head can automatically connect with the mounting block. When the connection between the mounting head and the mounting block is subsequently disconnected, the adjusting rod can cooperate with the trigger block to control the movement of the connecting block, disconnect the connection between the connecting block and the connecting groove, so that the fitting head can move, improving the convenience of subsequent disassembly.

[0020] (5) The elastic buffer pad can provide a connection buffer between the mounting head and the mating groove. When the threads between the mounting head and the mating groove are not aligned, the movement of the mounting head can push the mating groove to squeeze the elastic buffer pad, so that the mounting head can continue to rotate and mate with the mating groove. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a side view of the structure of the present invention.

[0023] Figure 3 This is a top view of the structure of the present invention.

[0024] Figure 4 This is a side view of the radiation assembly structure of the present invention.

[0025] Figure 5 This is a schematic diagram of the distribution structure of the first mounting bracket and the second mounting bracket of the present invention.

[0026] Figure 6 This is a schematic diagram of the connection structure between the first mounting bracket and the second mounting bracket of the present invention.

[0027] Figure 7 This is a schematic diagram of the internal structure of the first mounting bracket of the present invention.

[0028] Figure 8 This is a schematic diagram of the three-dimensional structure of the fixing block of the present invention.

[0029] Figure 9This is a side view of the front cylinder structure of the present invention.

[0030] Figure 10 This is a schematic diagram of the main cross-sectional structure connecting the mounting block and mounting head of the present invention.

[0031] In the diagram: 1. Front ring; 2. Front cylinder; 3. Rear ring; 4. Rear cylinder; 5. Radiation assembly; 6. Beam mechanism; 7. First mounting bracket; 8. Second mounting bracket; 9. Connecting bracket; 10. Mounting head; 11. Adjusting rod; 12. Auxiliary head; 13. Connecting block; 14. Return spring; 15. Trigger block; 16. Fitting head; 17. Connecting groove; 18. Fixing block; 19. Mounting block; 20. Docking groove; 21. Elastic buffer pad. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1: The present invention provides the following technical solution: a stable rotating gantry for proton therapy, such as... Figure 1-5 As shown, it includes a set of symmetrically distributed front ring 1 and rear ring 3. The outer diameters of the front ring 1 and rear ring 3 are the same. A front cylinder 2 is installed on the right side of the front ring 1, and a rear cylinder 4 is installed on the left side of the rear ring 3. A stable connection mechanism is provided between the front cylinder 2 and the rear cylinder 4. A beam mechanism 6 is installed outside the stable connection mechanism, and a radiation component 5 is installed below the beam mechanism 6. The stable connection mechanism includes a first mounting frame 7 and a second mounting frame 8. The center distances of the first mounting frame 7 and the second mounting frame 8 from the center distance of the front ring 1 are equal. A connecting frame 9 is fixed between the first mounting frame 7 and the second mounting frame 8. The beam mechanism 6 is installed on the outside of the connecting frame 9. The first mounting frame 7, the second mounting frame 8, and the connecting frame 9 form a set of frames. The ends of the first mounting frame 7 and the second mounting frame 8 are provided with docking installation mechanisms to connect the first mounting frame 7 and the second mounting frame 8 to the front cylinder 2 and the rear cylinder 4.

[0034] The front ring 1 and the rear ring 3 have the same outer diameter. The front cylinder 2 and the rear cylinder 4 are connected by a first mounting bracket 7 and a second mounting bracket 8 to form a cylindrical structure. The beam mechanism 6 and the radiation assembly 5 are mounted through a connecting bracket 9, so that the first mounting bracket 7 and the second mounting bracket 8 can provide stable support for them. Figure 4 As shown, when it is necessary to inspect the wiring harness inside the frame, the first mounting bracket 7 and the second mounting bracket 8 that are obstructed can be removed separately, and the first mounting bracket 7 and the second mounting bracket 8 can also be replaced separately if they are damaged.

[0035] Example 2: Based on Example 1, as follows Figure 5-6 and Figure 8 As shown, the first mounting bracket 7, the second mounting bracket 8, and the connecting bracket 9 are further disclosed, with the center of the front cylinder 2 as the center of the circle and the angles are equal. The distance between the second mounting bracket 8 and the adjacent first mounting bracket 7 is equal. A fitting head 16 is provided between the first mounting bracket 7 and the second mounting bracket 8. A connecting groove 17 is provided inside the fitting head 16, and a fixing block 18 is fixed to the inner end of the fitting head 16. The adjacent first mounting bracket 7 and second mounting bracket 8 that are not connected by the connecting bracket 9 are connected by the fitting head 16 and the fixing block 18. The positions of the fixing block 18 and the connecting bracket 9 are staggered. A connection locking mechanism is provided inside the first mounting bracket 7 and the second mounting bracket 8. The first mounting bracket 7 and the second mounting bracket 8 are connected by the connection locking mechanism and the connecting groove 17 in the fitting head 16, respectively.

[0036] The first mounting bracket 7 and the second mounting bracket 8, which are not connected by the connecting bracket 9, are connected by the fitting head 16 and the fixing block 18, such as Figure 5 As shown, this keeps the frame stable as a whole, and when the first mounting bracket 7 and the second mounting bracket 8 are disassembled later, the limit on the bonding head 16 can be released, the bonding head 16 can be moved to the end of the first mounting bracket 7 and the second mounting bracket 8, and then the first mounting bracket 7 and the second mounting bracket 8 can be taken out from the frame, exposing the internal structure of the frame, which is convenient for related inspection and maintenance.

[0037] Example 3: Based on Example 2, such as Figure 7-10As shown, the docking and mounting mechanism further discloses a mounting head 10, an adjusting rod 11, an auxiliary head 12, and a positioning mechanism. The mounting head 10 is located at the left and right ends of the first mounting frame 7 and the second mounting frame 8. The adjusting rod 11 is fixed to the inner end of the mounting head 10, and the inner end of the adjusting rod 11 is located inside the first mounting frame 7 and the second mounting frame 8, forming a threaded connection with it. The auxiliary head 12 is fixed to the surface of the adjusting rod 11 to control the rotation of the adjusting rod 11. The positioning mechanism is located inside the front cylinder 2 and the rear cylinder 4 and is interconnected with the mounting head 10. The positioning mechanism includes a mounting block 19 and a docking groove 20. The mounting blocks 19 are evenly distributed inside the front cylinder 2 and the rear cylinder 4. The docking groove 20 is formed on the surface of the mounting block 19, and the docking groove 20 and the mounting head 10 form a threaded connection. The mounting block 19 and the front cylinder 2 and the rear cylinder 4 form a left-right sliding structure. An elastic buffer pad 21 is fixed to the outer side of the mounting block 19. The elastic buffer pad 21 is fixedly connected to the front cylinder 2 and the rear cylinder 4 respectively. The fitting head 16 and the first mounting head 10 are connected to the first mounting head 10. The first mounting bracket 7 and the second mounting bracket 8 form a horizontal sliding structure, allowing the contact head 16 to be moved away from the outside of the first mounting bracket 7 and the second mounting bracket 8. The connection locking mechanism includes a connecting block 13, a return spring 14, and an automatic release mechanism. The connecting block 13 is located inside the first mounting bracket 7 and the second mounting bracket 8, and a telescopic structure is formed between the connecting block 13 and the first mounting bracket 7 and the second mounting bracket 8. The return spring 14 is located on the outside of the connecting block 13 to provide a thrust to the connecting block 13, causing the connecting block 13 to move into the first mounting bracket 7 and the second mounting bracket 8. The return spring 14 is made of non-metallic material. The automatic release mechanism is located at the inner end of the connecting block 13 to control the movement of the connecting block 13. The automatic release mechanism is composed of a trigger block 15, which is in contact with the inner end of the connecting block 13. The surface of the trigger block 15 has an inclined structure design, and a horizontal sliding structure is formed between the trigger block 15 and the first mounting bracket 7 and the second mounting bracket 8. At the same time, the trigger block 15 is rotatably connected to the inner end of the adjusting rod 11.

[0038] When disassembling the first mounting bracket 7 and the second mounting bracket 8, the auxiliary heads 12 at the ends of the first mounting bracket 7 and the second mounting bracket 8 to be disassembled can be rotated. This causes the auxiliary heads 12 to rotate the adjusting rod 11. The adjusting rod 11 moves horizontally through the threaded connection between itself and the first mounting bracket 7 and the second mounting bracket 8, simultaneously moving the mounting head 10. Figure 10 As shown, disconnect the mounting head 10 from the docking groove 20, leaving a gap between the mounting head 10 and the front cylinder 2 and the rear cylinder 4. Simultaneously, the adjusting rod 11 moves the trigger block 15. Figure 7As shown, the trigger block 15 releases the pressure on the connecting block 13, and the reset spring 14 pushes the connecting block 13 to move, thus releasing the connection between the connecting block 13 and the connecting groove 17. At the same time, the first mounting bracket 7 of the adjacent group is removed, and the connection between its surface connecting block 13 and the connecting groove 17 is released. Then, the fixing block 18 can be moved horizontally to move the fitting head 16 from the outside of the first mounting bracket 7 and the second mounting bracket 8. The first mounting bracket 7 and the second mounting bracket 8 can be removed separately, which facilitates subsequent maintenance work. The first mounting bracket 7 and the second mounting bracket 8 can also be replaced locally in this way.

[0039] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0040] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set up," "install," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A stable rotating gantry for proton therapy, comprising a set of left-right symmetrically distributed front rings (1) and rear rings (3); Its features are: The outer diameters of the front ring (1) and the rear ring (3) are the same, and the front cylinder (2) is installed on the right side of the front ring (1) and the rear cylinder (4) is installed on the left side of the rear ring (3). A stable connection mechanism is provided between the front cylinder (2) and the rear cylinder (4), and a beam mechanism (6) is installed outside the stable connection mechanism. A radiation component (5) is installed below the beam mechanism (6). The stable connection mechanism includes a first mounting frame (7) and a second mounting frame (8). The center distances of the first mounting frame (7) and the second mounting frame (8) from the center distance of the front ring (1) are equal. A connecting frame (9) is fixed between the first mounting frame (7) and the second mounting frame (8). The beam mechanism (6) is installed outside the connecting frame (9). The first mounting frame (7), the second mounting frame (8), and the connecting frame (9) form a set of frames. A docking installation mechanism is provided at the ends of the first mounting frame (7) and the second mounting frame (8) to connect the first mounting frame (7) and the second mounting frame (8) with the front cylinder (2) and the rear cylinder (4). The first mounting bracket (7), the second mounting bracket (8), and the connecting bracket (9) are distributed at equal angles with the center of the front cylinder (2) as the center, and the distance between the second mounting bracket (8) and the adjacent first mounting bracket (7) is equal; A fitting head (16) is provided between the first mounting bracket (7) and the second mounting bracket (8), and a connecting groove (17) is provided inside the fitting head (16), and a fixing block (18) is fixed at the inner end of the fitting head (16). The first mounting bracket (7) and the second mounting bracket (8) that are not connected by the connecting bracket (9) are connected by the fitting head (16) and the fixing block (18), and the positions of the fixing block (18) and the connecting bracket (9) are staggered. Both the first mounting bracket (7) and the second mounting bracket (8) are provided with a connection locking mechanism. The first mounting bracket (7) and the second mounting bracket (8) are connected by the connection locking mechanism and the connection groove (17) in the fitting head (16), respectively.

2. A stable rotating gantry for proton therapy according to claim 1, characterized in that: The docking and installation mechanism includes an installation head (10), an adjusting rod (11), an auxiliary head (12), and a positioning mechanism; Mounting heads (10) are located at the left and right ends of the first mounting bracket (7) and the second mounting bracket (8); The adjusting rod (11) is fixed to the inner end of the mounting head (10), and the inner end of the adjusting rod (11) is located inside the first mounting bracket (7) and the second mounting bracket (8) to form a threaded connection with them; An auxiliary head (12) is fixed to the surface of the adjusting rod (11) to control the rotation of the adjusting rod (11); The positioning mechanism is located inside the front cylinder (2) and the rear cylinder (4) and is connected to the mounting head (10).

3. A stable rotating gantry for proton therapy according to claim 2, characterized in that: The positioning mechanism includes a mounting block (19) and a docking groove (20); Mounting blocks (19) are evenly distributed inside the front cylinder (2) and the rear cylinder (4); A mating groove (20) is formed on the surface of the mounting block (19), and a threaded connection is formed between the mating groove (20) and the mounting head (10).

4. A stable rotating gantry for proton therapy according to claim 3, characterized in that: The mounting block (19), the front cylinder (2), and the rear cylinder (4) form a left-right sliding structure, and an elastic buffer pad (21) is fixed on the outside of the mounting block (19). The elastic buffer pad (21) is fixedly connected to the front cylinder (2) and the rear cylinder (4).

5. A stable rotating gantry for proton therapy according to claim 4, characterized in that: The bonding head (16) and the first mounting bracket (7) and the second mounting bracket (8) respectively form a horizontal sliding structure, so that the bonding head (16) can be moved away from the outside of the first mounting bracket (7) and the second mounting bracket (8).

6. A stable rotating gantry for proton therapy according to claim 5, characterized in that: The connection locking mechanism includes a connecting block (13), a reset spring (14), and an automatic release mechanism; The connecting block (13) is disposed inside the first mounting bracket (7) and the second mounting bracket (8), and the connecting block (13) forms a telescopic structure with the first mounting bracket (7) and the second mounting bracket (8); The return spring (14) is located on the outside of the connecting block (13) to provide thrust to the connecting block (13), so that the connecting block (13) moves into the first mounting bracket (7) and the second mounting bracket (8), and the return spring (14) is made of non-metallic material; The automatic release structure is set at the inner end of the connecting block (13) to control the movement of the connecting block (13).

7. A stable rotating gantry for proton therapy according to claim 6, characterized in that: The automatic release mechanism is composed of a trigger block (15). The inner ends of the trigger block (15) and the connecting block (13) are in contact, and the surface of the trigger block (15) is designed with an inclined structure. The trigger block (15), the first mounting bracket (7), and the second mounting bracket (8) respectively form a horizontal sliding structure. At the same time, the inner ends of the trigger block (15) and the adjusting rod (11) are rotatably connected.

Images