Multi-leaf grating in-place compensation medical electron linear accelerator and ray image system

Abstract

The invention relates to the technical field of medical electron linear accelerators, in particular to a multi-leaf grating in-place compensation medical electron linear accelerator and a ray imaging system.The multi-leaf grating in-place compensation medical electron linear accelerator comprises an accelerator body and a supporting seat, and a bed board is arranged on the supporting seat; a supporting unit for supporting the extending bed board is arranged on the side, facing the accelerator body, of the supporting base and comprises a vertically-arranged storage box, an opening is formed in the upper portion of the storage box, and a plurality of supporting pieces hinged to one another are stored in the storage box and can extend out of the opening of the storage box. The extending supporting pieces rotate by 90 degrees and are parallel to the horizontal plane, the supporting pieces are arranged in the storage box in the vertical direction, and locking units are arranged on the adjacent supporting pieces which are horizontally arranged. The bottom of the bed board can be comprehensively supported, it is guaranteed that the bed board cannot be bent after being used for a long time, and the occupied space is small.

Description

Technical Field

[0001] The invention relates to the technical field of medical electron linear accelerators, in particular to a multi-leaf grating in-place compensation medical electron linear accelerator and a ray imaging system. Background Art

[0002] Medical linear accelerators have high requirements for positioning accuracy, including the multi-leaf grating in-place compensation method, which aims to improve the positioning accuracy of the multi-leaf grating during radiotherapy. Multi-leaf grating (MLC), also known as multi-leaf collimator, is a common supporting device in radiotherapy equipment. It consists of multiple leaves and can form irregular-shaped radiation fields required clinically under computer control, thereby achieving high-precision radiotherapy. In addition to the high-energy beam irradiation projected by the multi-leaf grating, the bed board used to hold the patient will also affect the accuracy of radiotherapy. With the long-term use of the medical bed, the medical bed may undergo plastic deformation, causing the high-energy beam irradiation position to shift, resulting in reduced radiotherapy accuracy and damage to other normal tissues.

[0003] Chinese patent CN117379710B discloses a medical linear accelerator, comprising: a bracket, on which a radiation device and a lifting platform are fixedly mounted; a receiving plate, fixedly mounted on the lifting platform, a bed plate slidably mounted on a side of the receiving plate away from the lifting platform, the bed plate being connected to a lateral translation component mounted on the receiving plate; and further comprising: a symmetrically arranged fixing plate, the fixing plate being fixed on a side of the receiving plate facing the radiation device, a slide groove being formed on the fixing plate, a sliding plate being slidably mounted in the slide groove, and a sliding plate connected to the receiving plate on one side is mounted. The fixed plate is connected to a follow-up lifting mechanism, and the follow-up lifting mechanism is connected to the lateral translation component. When the lateral translation component drives the follow-up lifting mechanism to move, it drives the sliding plate to slide in the sliding groove; a speed control component is connected to the follow-up lifting mechanism and can be actuated when the follow-up lifting mechanism moves to adjust the movement rate of the sliding plate; an isometric support mechanism is connected to the bed board and the sliding plate. The isometric support mechanism is also connected to the speed control component. When the bed board moves relative to the receiving plate, the isometric support mechanism performs a follow-up expansion movement.

[0004] Although the above scheme improves the support for the bed board through the lateral translation component, only the end of the bed board has supporting force when in use, and the middle part of the extended bed board is still suspended. Even if a lateral translation component is set at the lower part of the bed board, the bed board is still in a state of stress in the middle section when it is used under force. Even if the strength of the lateral translation component is high, the bed board will inevitably bend when it is suspended in the air to carry people, and the bending of the bed board will affect the accuracy of the high-energy beam irradiation projected from the multi-leaf grating. If a support unit is directly added to one side of the bed board, the traditional support unit is longer and occupies more space after being unfolded. The existing medical electron linear accelerator part of the accelerator body can rotate around the bed board. The traditional support unit with a large space occupancy rate will hinder the operation of the medical electron linear accelerator with a rotating function. Summary of the invention

[0005] In view of the above problems, a multi-leaf grating in-place compensation medical electron linear accelerator and a radiographic imaging system are provided. When in use, the patient first lies flat on the bed board, and the support members are located in the storage box. The support members located in the storage box are arranged in the vertical direction. When the bed board begins to move toward the accelerator body in the horizontal direction, the support members arranged in the storage box also rise in the vertical direction synchronously, and the support members that rise to the opening of the storage box gradually rotate, and the support members stop rotating after rotating 90 degrees. It is worth noting that in order to facilitate the support members to rotate autonomously after rising, when the support members are stored in the storage box in the vertical direction, the support members located on the uppermost side are located at the upper part of the storage box, and the support members are in an inclined state, and the support members are inclined toward the accelerator body. In this way, when the bed board moves in the horizontal direction, the support members arranged in the storage box will rise in the vertical direction synchronously. Since the support members located on the uppermost side are inclined toward the accelerator body, the rising support members will be subjected to a rotation in the direction toward the accelerator body. The pulling force is applied to the accelerator body, so that the raised support can automatically rotate 90 degrees. When two adjacent support members extend from the opening of the storage box and rotate 90 degrees, the locking units on the two adjacent support members are activated, and the locking units on the two adjacent support members lock the two adjacent support members, so that the two support members cannot rotate relative to each other. In this way, as the bed board continues to move, the support members continue to extend. The support members that are in a horizontal state and have been locked can fully support the bottom of the bed board. Since the size of the support members in the length direction of the bed board is small, the support members are not easy to bend when supporting the bed board, and the horizontally arranged support members form a supporting end face, which can fully support the bottom of the bed board, ensuring that the bed board will not bend after long-term use, and when supporting the bed board, they are close to the bottom of the bed board, and the space occupancy is low. It can be used in medical electron linear accelerators with rotation function.

[0006] To solve the problems of the prior art, the present invention provides a multi-leaf grating in-position compensation medical electron linear accelerator, comprising an accelerator body and a support base arranged on one side of the accelerator body, a bed board being slidably arranged on the support base along the extension direction of the support base; a support unit for supporting the extended bed board is arranged on the side of the support base facing the accelerator body, the support unit comprises a vertically arranged storage box, an opening is arranged at the upper part of the storage box, a plurality of mutually hinged support members are stored in the storage box, the plurality of mutually hinged support members can be extended from the opening of the storage box, the extended support members are rotated 90 degrees and parallel to the horizontal plane, the support members are arranged in the vertical direction when in the storage box, and locking units are arranged on adjacent support members arranged horizontally, the locking unit locks the two adjacent support members when both are in a horizontal state, the support members cannot rotate after being locked, and the support members in the horizontal arrangement provide support for the extended bed board.

[0007] Preferably, the support member is composed of an upper support portion and a lower support portion, the upper support portion and the lower support portion are staggered and fixedly connected, adjacent support members are hinged through the side wall of the lower support portion, the upper support portion of the support members arranged in a horizontal direction protrudes toward the side away from the accelerator body, and the lower support portion protrudes toward the side close to the accelerator body. When the support members are arranged in the horizontal direction, among two adjacent support members, the upper support portion of the support member close to the accelerator body overlaps the lower support portion of the support member away from the accelerator body.

[0008] Preferably, the speed at which the horizontally arranged support members move in the horizontal direction is always the same as the speed at which the bed board moves in the horizontal direction.

[0009] Preferably, the locking unit includes a locking rod rotatably arranged at the lower part of the upper support part along the thickness direction of the support member, the locking rod is an "L"-shaped structure, a coil spring is arranged at the upper part of the vertical structure of the locking rod, an entry groove is opened at the upper part of the lower support part, the extension direction of the entry groove is parallel to the width direction of the support member, a locking groove is arranged at the bottom of the entry groove, the locking groove is a fan-shaped structure, and the locking groove and the entry groove are connected to each other, the locking rod is slidably matched with the entry groove, and the locking rod slides into the locking groove through the entry groove and rotates around the axis of the locking rod itself, and the horizontal structure of the rotating locking rod is snap-fitted with the locking groove.

[0010] Preferably, a button is provided on the side of the upper support portion in the protruding direction of the lower support portion, and a toggle unit is provided in the locking groove. After two adjacent support members are arranged in a horizontal direction, the upper support portion on one of the two adjacent support members overlaps with the lower support portion on the other support member. After the button is overlapped, the upper support portion is pressed, and the toggle unit is activated and drives the locking rod to rotate in the locking groove.

[0011] Preferably, a molding unit is provided on the side of the storage box facing the accelerator body, and the molding unit provides a support platform for the support member after it is rotated to a horizontal state. The molding unit includes a molding frame, which is hinged on the storage box, and rollers are evenly arranged on the molding frame. The rollers contact and roll with the bottom of the support member in a horizontal state. A lifting block is arranged below the molding frame for movement in a vertical direction, and a connecting rod is hinged at one end of the molding frame away from the storage box, and the end of the connecting rod away from the molding frame is hinged to the lifting block.

[0012] Preferably, a self-locking unit is provided at the bottom of the lifting block, and the self-locking unit includes a self-locking rod, a self-locking sleeve and a one-way valve. The self-locking rod is fixedly arranged at the bottom of the lifting block in a vertical direction, and the self-locking sleeve is arranged at the lower part of the self-locking rod. The self-locking rod is slidably arranged in the self-locking sleeve in a vertical direction. Hydraulic oil is stored in the self-locking sleeve. A one-way valve is provided on one side of the self-locking sleeve, and the one-way valve can inject hydraulic oil into the self-locking sleeve.

[0013] Preferably, a circulation box is provided on one side of the self-locking sleeve, and hydraulic oil is contained in the circulation box. The circulation box and the self-locking sleeve are connected by a connecting pipe, and a switch valve is provided on the connecting pipe. The circulation box is connected to the one-way valve. When the lifting block rises, the switch valve is in a closed state, and before the lifting block descends, the switch valve is opened.

[0014] Preferably, a lifting unit for driving the support member to rise is provided in the storage box, the lifting unit includes a lifting plate, the lifting plate is arranged in the storage box for movement along the vertical direction, a lifting cavity is provided at the lower part of the lifting plate, hydraulic oil is stored in the lifting cavity, a liquid supply unit is provided at one side of the lifting cavity and is connected with the lifting cavity, the liquid supply unit can supply hydraulic oil to the lifting cavity or extract hydraulic oil from the lifting cavity.

[0015] The invention also relates to a ray imaging system, which is applied to a multi-leaf grating in-place compensation medical electron linear accelerator.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. When the present invention is in use, the patient first lies flat on the bed board, and the support members are located in the storage box. The support members located in the storage box are arranged in the vertical direction. When the bed board starts to move toward the accelerator body in the horizontal direction, the support members arranged in the storage box also rise in the vertical direction synchronously. The support members that rise to the opening of the storage box gradually rotate, and the support members stop rotating after rotating 90 degrees. It is worth noting that in order to facilitate the support members to rotate autonomously after rising, when the support members are stored in the storage box in the vertical direction, the support members located on the uppermost side are at the upper part of the storage box, and the support members are in an inclined state, and the support members are inclined toward the accelerator body. In this way, when the bed board moves in the horizontal direction, the support members arranged in the storage box will rise in the vertical direction synchronously. Since the support members located on the uppermost side are inclined toward the accelerator body, the support members that have risen will be subjected to a pulling force toward the accelerator body, so that The raised support members can automatically rotate 90 degrees. When two adjacent support members extend from the opening of the storage box and rotate 90 degrees, the locking units on the two adjacent support members are activated, and the locking units on the two adjacent support members lock the two adjacent support members, so that the two support members cannot rotate relative to each other. In this way, as the bed board continues to move, the support members continue to extend. The support members that are in a horizontal state and have completed locking can fully support the bottom of the bed board. Since the size of the support members in the length direction of the bed board is small, the support members themselves are not easy to bend when supporting the bed board, and the horizontally arranged support members form a supporting end surface, which can fully support the bottom of the bed board, ensuring that the bed board will not bend after long-term use, and when supporting the bed board, it is close to the bottom of the bed board, and the space occupancy is low. It can be used in medical electron linear accelerators with rotation function. 2. The present invention provides a molding unit so that the molding unit can provide a support platform for the support member that has just been rotated to a horizontal state, so that the locking unit can lock two adjacent support members in a horizontal state. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of a medical electron linear accelerator with multi-leaf grating in place compensation; Figure 2 It is a side view of a medical electron linear accelerator with multi-leaf grating compensation in place; Figure 3 It is a multi-leaf grating in place to compensate for the medical electron linear accelerator Figure 2 Schematic cross-sectional view at AA in the middle; Figure 4 It is a multi-leaf grating in place to compensate for the medical electron linear accelerator Figure 3 A partial enlarged schematic diagram of point B in the middle; Figure 5It is a cutaway stereoscopic schematic diagram of a multi-leaf grating in-place compensation medical electron linear accelerator; Figure 6 It is a multi-leaf grating in place to compensate for the medical electron linear accelerator Figure 5 A partial enlarged schematic diagram of point C in the middle; Figure 7 It is a multi-leaf grating in place to compensate for the medical electron linear accelerator Figure 5 A partial enlarged schematic diagram of point D in the middle; Figure 8 It is a three-dimensional schematic diagram of a multi-leaf grating in-place compensation medical electron linear accelerator after the accelerator body is removed; Fig. 9 It is a multi-leaf grating in place to compensate for the medical electron linear accelerator Figure 8 A partial enlarged schematic diagram of point E in the middle; Fig.10 It is a three-dimensional schematic diagram of the support unit of a multi-leaf grating in-place compensation medical electron linear accelerator; Fig.11 It is a three-dimensional schematic diagram of the two supporting parts of the multi-leaf grating in place compensation medical electron linear accelerator being hinged to each other; Fig.12 It is a multi-leaf grating in place to compensate for the medical electron linear accelerator Fig.11 A partial enlarged schematic diagram of point F in the middle; Fig.13 It is a cutaway stereoscopic schematic diagram of a multi-leaf grating in-place compensation medical electron linear accelerator when two supporting parts are hinged to each other; Fig.14 It is a multi-leaf grating in place to compensate for the medical electron linear accelerator Fig.13 A local enlarged schematic diagram of point G in the middle.

[0018] The numbers in the figure are: 1, support seat; 11, bed plate; 2, accelerator body; 3, support unit; 31, support member; 311, upper support part; 312, lower support part; 32, storage box; 33, locking unit; 331, locking rod; 332, coil spring; 333, entry slot; 334, locking slot; 335, toggle unit; 3351, toggle claw; 3352, arc member; 3353, gear; 3354, rotation driver; 3355, synchronous wheel; 3356, synchronous belt ; 336, button; 34, molding unit; 341, molding frame; 3411, connecting rod; 342, roller; 343, lifting block; 344, slide; 345, self-locking unit; 3451, self-locking rod; 3452, self-locking sleeve; 3453, one-way valve; 3454, switch valve; 3455, circulation box; 3456, connecting pipe; 35, lifting unit; 351, lifting plate; 352, lifting chamber; 353, liquid supply unit; 3531, pump body; 3532, liquid supply box. DETAILED DESCRIPTION

[0019] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Reference Figure 1-Figure 4 and Fig.11 A multi-leaf grating in-place compensation medical electron linear accelerator comprises an accelerator body 2 and a support base 1 arranged on one side of the accelerator body 2, a bed board 11 is slidably arranged on the support base 1 along the extension direction of the support base 1; a support unit 3 for supporting the extended bed board 11 is arranged on the side of the support base 1 facing the accelerator body 2, the support unit 3 comprises a vertically arranged storage box 32, an opening is arranged on the upper part of the storage box 32, a plurality of mutually hinged support members 31 are stored in the storage box 32, the plurality of mutually hinged support members 31 can be extended from the opening of the storage box 32, the extended support members 31 rotate 90 degrees and are parallel to the horizontal plane, the support members 31 are arranged in the vertical direction when in the storage box 32, and locking units 33 are arranged on adjacent support members 31 arranged horizontally, the locking unit 33 locks the two adjacent support members 31 when both are in a horizontal state, the support members 31 cannot rotate after being locked, and the support members 31 in the horizontal arrangement provide support for the extended bed board 11.

[0021] When a conventional medical electron linear accelerator is in use, the patient usually lies on the bed board 11 first, and then the bed board 11 moves horizontally toward the accelerator body 2, and the bed board 11 extends from the side of the support base 1 close to the accelerator body 2. As the bed board 11 extends, the end of the support base 1 that extends out of the bed board 11 is away from the support base 1, and the support base 1 cannot provide support for the bed board 11. The bed board 11 is usually set to be relatively thin, so when the bed board 11 moves to the specified position, the bed board 11 will extend longer from the support base 1, and at this time, the patient is supported on the bed board 11, so that the bed board 11 will bend under the action of the patient's weight. In order to avoid the above situation, the existing solution is to set a support base 1 on the side of the support base 1 close to the accelerator body 2. A support unit 3 is provided, but the support unit 3 is an unfolded structure, and the support unit 3 can only support the end of the bed board 11, so that the bed board 11 between the support unit 3 and the support seat 1 is in a suspended state, and the medical electron linear accelerator has high requirements for the flatness of the bed board 11 when treating patients. After long-term use, the part of the bed board 11 located between the support unit 3 and the support seat 1 will bend, so that the patient lying on the bed board 11 is not in a completely horizontal state, which leads to a decrease in treatment accuracy. The multi-leaf grating in-place compensation can only compensate for the accuracy of the accelerator body 2, but it is difficult to adapt to the bending of the bed board 11. In this way, the support unit 3 is improved. The specific principle is as follows: the thickness of the support member 31 is large Due to the thickness of the bed board 11, the length direction of the support member 31 is parallel to the width direction of the bed board 11, and the width direction of the support member 31 is parallel to the length direction of the bed board 11. Adjacent support members 31 are hinged to each other through the side parts in the width direction. Since the support members 31 are shorter in the length direction of the bed board 11, when the support members 31 are arranged horizontally, the support members 31 are not easy to bend even if they support the bed board 11. This is because the support members 31 are shorter in the length direction of the bed board 11 and are not easy to bend. When in use, the patient first lies flat on the bed board 11, and the support members 31 are located in the storage box 32. The support members 31 located in the storage box 32 are arranged in the vertical direction. When the bed board 11 begins to move toward the height in the horizontal direction, the patient will lie flat on the bed board 11. When the accelerator body 2 moves, the support member 31 arranged in the storage box 32 also rises synchronously in the vertical direction, and the support member 31 rising to the opening of the storage box 32 gradually rotates, and the support member 31 stops rotating after rotating 90 degrees. It is worth noting that in order to facilitate the support member 31 to rotate autonomously after rising, when the support member 31 is stored in the storage box 32 in the vertical direction, the support member 31 located on the uppermost side is at the upper part of the storage box 32, and the support member 31 is in an inclined state, and the support member 31 is inclined toward the accelerator body 2. In this way, when the bed plate 11 moves in the horizontal direction, the support member 31 arranged in the storage box 32 rises synchronously in the vertical direction. Since the support member 31 located on the uppermost side is inclined toward the accelerator body 2,After the support members 31 are raised, they are subjected to a pulling force toward the accelerator body 2, so that the support members 31 can automatically rotate 90 degrees after being raised. When two adjacent support members 31 extend from the opening of the storage box 32 and rotate 90 degrees, the locking units 33 on the two adjacent support members 31 are activated, and the locking units 33 on the two adjacent support members 31 lock the two adjacent support members 31, so that the two support members 31 cannot rotate relative to each other. As the bed plate 11 continues to move, the support members 31 continue to extend, and are in a horizontal state and complete. The locked support member 31 can fully support the bottom of the bed board 11. Since the support member 31 is small in the length direction of the bed board 11, the support member 31 itself is not easy to bend when supporting the bed board 11. The horizontally arranged support member 31 forms a supporting end surface, which can fully support the bottom of the bed board 11, ensuring that the bed board 11 will not bend after long-term use. When supporting the bed board 11, it is close to the bottom of the bed board 11, and the space occupancy is low. It can be used in medical electron linear accelerators with rotation function.

[0022] Reference Figure 8-Figure 10 The support member 31 is composed of an upper support portion 311 and a lower support portion 312, the upper support portion 311 and the lower support portion 312 are staggered and fixedly connected, and adjacent support members 31 are hinged through the side wall of the lower support portion 312. The upper support portion 311 of the support members 31 arranged in a horizontal direction protrudes toward the side away from the accelerator body 2, and the lower support portion 312 protrudes toward the side close to the accelerator body 2. When the support members 31 are arranged in the horizontal direction, among two adjacent support members 31, the upper support portion 311 of the support member 31 close to the accelerator body 2 is overlapped on the lower support portion 312 of the support member 31 away from the accelerator body 2.

[0023] When the support member 31 is located in the storage box 32, the support member 31 located in the storage box 32 is arranged in the vertical direction. Among the two adjacent support members 31 in the storage box 32, the upper support portion 311 of the support member 31 located on the upper side is overlapped on the lower support portion 312 of the support member 31 located on the lower side. As the support member 31 in the storage box 32 gradually extends out, when the support member 31 rises to the opening position of the storage box 32, the support member 31 begins to rotate toward the accelerator body 2. After rotating 90 degrees, the support member 31 stops rotating. Then the locking unit 33 locks the adjacent support member 31 located on the side of the support member 31 facing the accelerator body 2 with the support member 31. The locked support members 31 are arranged in the horizontal direction and move synchronously with the bed board 11. For the sake of aesthetics, the lower support portion 312 of the uppermost support member 31 in the storage box 32 is in a non-extended state. In some embodiments, an electromagnetic plate is further provided on the upper portion of the storage box 32. When the support member 31 extends out of the storage box 32, the electromagnetic plate is energized, and the electromagnetic plate attracts the bottom of the rotating support member 31. The support member 31 adsorbed by the electromagnetic plate can only move in the horizontal direction, and the support member 31 in horizontal movement can also provide an inclined traction force to the support member 31 in the vertical movement state, thereby ensuring that the subsequent support member 31 can rotate smoothly. In this way, it is possible to avoid the situation where the support member 31 in the storage box 32 is pushed out too high but never rotates. In other embodiments, a slide rail for limiting the left and right movement of the support member 31 is provided on the upper portion of the storage box 32, and the slide rail can prevent the support member 31 from moving upward to a level higher than the horizontal plane formed by the support members 31.

[0024] Reference Figure 1-Figure 14 : The speed at which the horizontally arranged support members 31 move in the horizontal direction is always the same as the speed at which the bed board 11 moves in the horizontal direction.

[0025] If there is a difference between the horizontal movement speed of the support member 31 and the horizontal movement speed of the bed board 11, relative friction will occur between the support member 31 and the bed board 11. After long-term use, both the upper part of the support member 31 and the bottom of the bed board 11 will inevitably be worn. By setting the horizontal movement speed of the support member 31 to be the same as the horizontal movement speed of the bed board 11, it can be ensured that the horizontally arranged support member 31 and the bed board 11 are in a relatively static state.

[0026] Reference Fig.12 and Fig.14The locking unit 33 includes a locking rod 331 which is rotatably arranged at the lower part of the upper support part 311 along the thickness direction of the support member 31. The locking rod 331 is an "L"-shaped structure. A coil spring 332 is arranged at the upper part of the vertical structure of the locking rod 331. An entry slot 333 is opened at the upper part of the lower support part 312. The extension direction of the entry slot 333 is parallel to the width direction of the support member 31. A locking slot 334 is arranged at the bottom of the entry slot 333. The locking slot 334 is a fan-shaped structure, and the locking slot 334 is connected to the entry slot 333. The locking rod 331 is slidably matched with the entry slot 333. After the locking rod 331 slides into the locking slot 334 through the entry slot 333, it rotates around the axis of the locking rod 331 itself. After the rotation, the horizontal structure of the locking rod 331 is snap-fitted with the locking slot 334.

[0027] The coil spring 332 provided on the locking rod 331 is used to ensure that the locking rod 331 will not rotate arbitrarily when the support member 31 rotates, thereby causing the locking rod 331 to be unable to be smoothly inserted into the entry slot 333. After the support member 31 is extended from the storage box 32 and rotated to a horizontal state, the locking rod 331 on the support member 31 will be inserted into the adjacent support member 31 facing the accelerator body 2 during the rotation process, that is, the locking rod 331 is inserted into the entry slot 333 of the adjacent support member 31. When the two adjacent support members 31 are in a horizontal arrangement, the locking rod 331 completely passes through the entry slot 333 and enters the locking slot 334. At this time, the locking rod 331 rotates around its own axis, and the locking rod 331 rotates from the entry slot 333 to the locking slot 334. The locking slot 334 is plugged into and matched with the locking rod 331, so that the space between the two adjacent support members 31 is After the locking is completed, when the treatment is over, the bed board 11 moves horizontally in the direction away from the accelerator body 2, and the horizontally arranged support members 31 are synchronously and quickly retracted into the storage box 32. Before the support members 31 are retracted into the storage box 32, the locking rod 331 on the adjacent support member 31 facing the side of the accelerator body 2 needs to be rotated and reset. The support member 31 that needs to be stored in the storage box 32 is the first reference member, and the support frame located on the side of the first reference member facing the accelerator body 2 is called the second reference member, that is, before the first reference member starts to rotate from the horizontal state to the vertical state, the locking rod 331 on the second reference member is rotated and reset to the bottom of the entry slot 333 of the first reference member and completely matches the vertical projection of the entry slot 333. In this way, when the first reference member rotates, the locking rod 331 on the second reference member can smoothly slide from the locking slot 334 of the first reference member into the entry slot 333 and slide out of the entry slot 333.

[0028] Reference Figure 1-Figure 14: A button 336 is provided on the side of the upper support portion 311 in the protruding direction of the lower support portion 312, and a toggle unit 335 is provided in the locking groove 334. After the two adjacent support members 31 are arranged in a horizontal direction, the upper support portion 311 on one of the two adjacent support members 31 overlaps with the lower support portion 312 on the other support member 31. After the button 336 is overlapped, the upper support portion 311 is pressed, and the toggle unit 335 is activated and drives the locking rod 331 to rotate in the locking groove 334.

[0029] The toggle unit 335 includes a toggle claw 3351, an arc-shaped member 3352, a gear 3353 and a rotation driver 3354. The arc-shaped member 3352 is rotatably arranged in the locking groove 334 around the axis of the locking groove 334. The toggle claw 3351 is horizontally fixed on the inner ring side of the arc-shaped member 3352. The outer ring side of the arc-shaped member 3352 is evenly provided with meshing teeth around the axis of the arc-shaped member 3352. The gear 3353 is rotatably arranged on one side of the arc-shaped member 3352. The gear 3353 is meshed with the meshing teeth on the outer ring side of the arc-shaped member 3352. The rotation driver 3354 is arranged at one end of the gear 3353. The rotation driver 3354 is used to drive the gear 3353 to rotate. In order to ensure the stability of locking, the present invention is provided with a plurality of locking rods 331 and corresponding locking grooves 334. In order to reduce costs, a gear is correspondingly arranged on one side of the plurality of locking grooves 334. Wheel 3353, a synchronous wheel 3355 is provided at the end of the gear 3353, and a synchronous belt 3356 is sleeved on all the synchronous wheels 3355. The wrap angles of the synchronous belt 3356 and the synchronous wheel 3355 are not zero. The output end of the rotation driver 3354 is fixedly connected to one of the synchronous wheels 3355. The rotation driver 3354 is preferably a servo motor. When the button 336 is pressed, the two adjacent support members 31 are in a horizontal arrangement state, the locking rod 331 passes through the entry groove 333 and enters the locking groove 334, and the driving claw 3351 is just located in the locking groove 334. The locking rod 331 entering the locking groove 334 is just inserted into the driving claw 3351, so that when the driving claw 3351 rotates, the locking rod 331 can be driven to rotate. It is worth noting that when the support member 31 is in a vertical state, the button 336 is in a non-powered state.

[0030] Reference Figure 6 and Figure 8-Figure 10A molding unit 34 is provided on the side of the storage box 32 facing the accelerator body 2. The molding unit 34 provides a support platform for the support member 31 after it is rotated to a horizontal state. The molding unit 34 includes a molding frame 341. The molding frame 341 is hinged on the storage box 32. Rollers 342 are evenly arranged on the molding frame 341. The rollers 342 contact and roll with the bottom of the support member 31 in a horizontal state. A lifting block 343 is arranged below the molding frame 341 for movement in a vertical direction. A connecting rod 3411 is hinged at one end of the molding frame 341 away from the storage box 32. The end of the connecting rod 3411 away from the molding frame 341 is hinged to the lifting block 343.

[0031] A slide 344 is vertically fixed on one side of the storage box 32 facing the accelerator body 2, and a lifting block 343 is set on the slide 344. The slide 344 drives the lifting block 343 to move in the vertical direction. When the bed board 11 moves toward the accelerator body 2, the lifting block 343 rises under the drive of the slide 344. The lifting block 343 drives the forming frame 341 to rotate to a horizontal state through the connecting rod 3411. The total length of the upper part of the forming frame 341 and the upper part of the storage box 32 needs to be greater than the total length of the two hinged and horizontally arranged support members 31.

[0032] Reference Figure 7 and Fig.10 A self-locking unit 345 is arranged at the bottom of the lifting block 343, and the self-locking unit 345 includes a self-locking rod 3451, a self-locking sleeve 3452 and a one-way valve 3453. The self-locking rod 3451 is fixedly arranged at the bottom of the lifting block 343 in the vertical direction, the self-locking sleeve 3452 is sleeved on the lower part of the self-locking rod 3451, and the self-locking rod 3451 is slidably arranged in the self-locking sleeve 3452 in the vertical direction. Hydraulic oil is stored in the self-locking sleeve 3452, and a one-way valve 3453 is arranged on one side of the self-locking sleeve 3452. The one-way valve 3453 can inject hydraulic oil into the self-locking sleeve 3452.

[0033] When the lifting block 343 rises in the vertical direction, the lifting block 343 drives the self-locking rod 3451 to rise synchronously, and the self-locking rod 3451 slides in the self-locking sleeve 3452. The self-locking sleeve 3452 draws hydraulic oil through the one-way valve 3453, and the one-way valve 3453 self-locks the self-locking sleeve 3452, ensuring that the lifting block 343 has sufficient support after pushing the forming frame 341 to a horizontal state.

[0034] Reference Figure 7: A circulation box 3455 is provided on one side of the self-locking sleeve 3452. Hydraulic oil is stored in the circulation box 3455. The circulation box 3455 and the self-locking sleeve 3452 are connected via a connecting pipe 3456. A switch valve 3454 is provided on the connecting pipe 3456. The circulation box 3455 is connected to the one-way valve 3453. When the lifting block 343 rises, the switch valve 3454 is in a closed state. Before the lifting block 343 descends, the switch valve 3454 is opened.

[0035] When the lifting block 343 rises, it means that there is a patient on the bed board 11 and the patient needs treatment. In this case, the bottom of the bed board 11 needs to be supported by the support member 31. The support member 31 synchronously supports the moving bed board 11. The hydraulic oil in the circulation box 3455 is injected into the self-locking sleeve 3452 through the one-way valve 3453. When the lifting plate needs to be lowered, it means that the treatment is completed and the bed board 11 needs to be reset. The switch valve 3454 is opened, and the hydraulic oil in the self-locking sleeve 3452 flows back to the circulation box 3455 through the connecting pipe 3456.

[0036] Reference Figure 4 and Figure 8 A lifting unit 35 for driving the support member 31 to rise is arranged in the storage box 32. The lifting unit 35 includes a lifting plate 351. The lifting plate 351 is arranged in the storage box 32 for movement along the vertical direction. A lifting chamber 352 is arranged at the lower part of the lifting plate 351. The lifting chamber 352 contains hydraulic oil. A liquid supply unit 353 is arranged at one side of the lifting chamber 352 and is connected to the lifting chamber 352. The liquid supply unit 353 can supply hydraulic oil to the lifting chamber 352 or extract hydraulic oil from the lifting chamber 352.

[0037] The liquid supply unit 353 includes a pump body 3531 and a liquid supply box 3532. The liquid supply box 3532 is arranged on one side of the lifting chamber 352. The liquid supply box 3532 is located inside the storage box 32. The pump body 3531 is arranged on the liquid supply box 3532. The liquid supply box 3532 injects hydraulic oil into the lifting chamber 352 or draws hydraulic oil back from the lifting chamber 352 through the pump body 3531.

[0038] Reference Figure 1-Figure 14 The present invention also relates to a radiographic imaging system, which is applied to a multi-leaf grating in-place compensation medical electron linear accelerator.

[0039] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A multi-leaf grating in-position compensation medical electron linear accelerator, comprising an accelerator body (2) and a support base (1) arranged on one side of the accelerator body (2), wherein a bed plate (11) is slidably arranged on the support base (1) along the extension direction of the support base (1); characterized in that: A support unit (3) for supporting the extended bed board (11) is arranged on a side of the support seat (1) facing the accelerator body (2), the support unit (3) comprising a vertically arranged storage box (32), the upper portion of the storage box (32) being provided with an opening, a plurality of mutually hinged support members (31) being stored in the storage box (32), the plurality of mutually hinged support members (31) being able to extend from the opening of the storage box (32), the extended support members (31) being rotated 90 degrees and parallel to a horizontal plane, the support members (31) being arranged in a vertical direction when in the storage box (32), adjacent support members (31) being arranged horizontally being provided with locking units (33), the locking units (33) locking the two adjacent support members (31) when both are in a horizontal state, the support members (31) being unable to rotate after being locked, and the support members (31) being arranged horizontally providing support for the extended bed board (11).

2. The multi-leaf grating in-place compensation medical electron linear accelerator according to claim 1, characterized in that: The support member (31) is composed of an upper support portion (311) and a lower support portion (312); the upper support portion (311) and the lower support portion (312) are staggered and fixedly connected; adjacent support members (31) are hinged via the side wall of the lower support portion (312); the upper support portion (311) of the support members (31) arranged in a horizontal direction protrudes toward a side away from the accelerator body (2); the lower support portion (312) protrudes toward a side close to the accelerator body (2); and when the support members (31) are arranged in a horizontal direction, the upper support portion (311) of the support member (31) close to the accelerator body (2) of two adjacent support members (31) overlaps the lower support portion (312) of the support member (31) far from the accelerator body (2).

3. The multi-leaf grating in-place compensation medical electron linear accelerator according to claim 1, characterized in that: The speed at which the horizontally arranged support members (31) move in the horizontal direction is always the same as the speed at which the bed board (11) moves in the horizontal direction.

4. The multi-leaf grating in-place compensation medical electron linear accelerator according to claim 2, characterized in that: The locking unit (33) comprises a locking rod (331) rotatably arranged at the lower part of the upper support part (311) along the thickness direction of the support member (31); the locking rod (331) is an "L"-shaped structure; a coil spring (332) is arranged at the upper part of the vertical structure of the locking rod (331); an entry slot (333) is provided at the upper part of the lower support part (312); the extension direction of the entry slot (333) is parallel to the width direction of the support member (31); a locking slot (334) is provided at the bottom of the entry slot (333); the locking slot (334) is a fan-shaped structure; the locking slot (334) and the entry slot (333) are connected to each other; the locking rod (331) and the entry slot (333) are slidably matched; the locking rod (331) slides into the locking slot (334) through the entry slot (333) and then rotates around the axis of the locking rod (331); the horizontal structure of the rotating locking rod (331) is snap-fitted with the locking slot (334).

5. The multi-leaf grating in-place compensation medical electron linear accelerator according to claim 4, characterized in that: A button (336) is provided on one side of the upper support portion (311) in a protruding direction from the lower support portion (312), and a toggle unit (335) is provided in the locking groove (334). After two adjacent support members (31) are arranged in a horizontal direction, the upper support portion (311) on one of the two adjacent support members (31) overlaps with the lower support portion (312) on the other support member (31). After the button (336) is overlapped, the upper support portion (311) is pressed, and the toggle unit (335) is activated and drives the locking rod (331) to rotate in the locking groove (334).

6. The multi-leaf grating in-place compensation medical electron linear accelerator according to claim 1, characterized in that: A molding unit (34) is provided on a side of the storage box (32) facing the accelerator body (2). The molding unit (34) provides a support platform for the support member (31) after it rotates to a horizontal state. The molding unit (34) comprises a molding frame (341). The molding frame (341) is hinged on the storage box (32). Rollers (342) are evenly arranged on the molding frame (341). The rollers (342) contact and roll with the bottom of the support member (31) in a horizontal state. A lifting block (343) is provided below the molding frame (341) to move in a vertical direction. A connecting rod (3411) is hinged at one end of the molding frame (341) away from the storage box (32). The end of the connecting rod (3411) away from the molding frame (341) is hinged to the lifting block (343).

7. The multi-leaf grating in-place compensation medical electron linear accelerator according to claim 6, characterized in that: A self-locking unit (345) is arranged at the bottom of the lifting block (343). The self-locking unit (345) comprises a self-locking rod (3451), a self-locking sleeve (3452) and a one-way valve (3453). The self-locking rod (3451) is fixedly arranged at the bottom of the lifting block (343) in a vertical direction. The self-locking sleeve (3452) is sleeved on the lower part of the self-locking rod (3451). The self-locking rod (3451) is slidably arranged in the self-locking sleeve (3452) in a vertical direction. Hydraulic oil is stored in the self-locking sleeve (3452). A one-way valve (3453) is arranged on one side of the self-locking sleeve (3452). The one-way valve (3453) can inject hydraulic oil into the self-locking sleeve (3452).

8. The multi-leaf grating in-place compensation medical electron linear accelerator according to claim 7, characterized in that: A circulation box (3455) is provided on one side of the self-locking sleeve (3452). Hydraulic oil is stored in the circulation box (3455). The circulation box (3455) and the self-locking sleeve (3452) are connected via a connecting pipe (3456). A switch valve (3454) is provided on the connecting pipe (3456). The circulation box (3455) is connected to the one-way valve (3453). When the lifting block (343) rises, the switch valve (3454) is in a closed state. Before the lifting block (343) descends, the switch valve (3454) is opened.

9. The multi-leaf grating in-place compensation medical electron linear accelerator according to claim 1, characterized in that: A lifting unit (35) for driving the support member (31) to rise is arranged in the storage box (32). The lifting unit (35) comprises a lifting plate (351). The lifting plate (351) is arranged in the storage box (32) to move in a vertical direction. A lifting chamber (352) is arranged at the bottom of the lifting plate (351). Hydraulic oil is stored in the lifting chamber (352). A liquid supply unit (353) in communication with the lifting chamber (352) is arranged on one side of the lifting chamber (352). The liquid supply unit (353) can supply hydraulic oil to the lifting chamber (352) or extract hydraulic oil from the lifting chamber (352).

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