Radiation accelerator treatment head and tumor radiotherapy equipment

Abstract

The present invention discloses a ray accelerator treatment head, comprising a vertically arranged accelerator tube, a primary collimator cone installed at the lower end of the accelerator tube, and a multi-leaf collimator located below the primary collimator cone, a mobile gear bracket and a gear switching driver are installed below the primary collimator cone, a plurality of ray gears are arranged on the mobile gear bracket, and the gear switching driver can drive the mobile gear bracket to move so that different ray gears are aligned with the primary collimator cone to switch the treatment mode. The gear switching driver drives the mobile gear bracket to move, thereby realizing the ray gear switching, and can realize the limitation of the radiation field range and the switching of multiple treatment modes in a limited space, so that the device integrates multiple treatment modes, and the gear switching is convenient and fast, thereby improving the applicability of the device and meeting the clinical needs of fast, safe and accurate treatment. The present invention also discloses a tumor radiotherapy device including the above-mentioned ray accelerator treatment head.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, and in particular to a radiation accelerator treatment head. In addition, the present invention also relates to a tumor radiotherapy device comprising the radiation accelerator treatment head. Background Art

[0002] Tumor radiotherapy equipment uses high-energy rays to treat tumors, which has the advantages of high efficiency and precision. The main component of tumor radiotherapy equipment is the ray accelerator treatment head, which accelerates electrons through the accelerator to output high-energy rays, which are irradiated at the tumor location for treatment. At the same time, radiation radiation will also have an impact on the body. In order to prevent radiation leakage, it is necessary to set up collimating cones, multi-leaf collimators and other devices to form an irradiation hole that matches the shape of the tumor. After the rays pass through the irradiation hole, they are irradiated on the tumor to prevent the rays from irradiating locations other than the tumor.

[0003] The development trend of tumor radiotherapy technology is precision radiotherapy, pursuing fast, safe and accurate radiotherapy. The existing technology adopts a single treatment mode with a non-uniform beam mode, but cannot provide a conventional uniform irradiation mode. The irradiation effect of large-size radiation field is poor, resulting in limited application. It is impossible to limit the radiation field range and switch between multiple treatment modes in a limited space.

[0004] Therefore, how to provide a radiation accelerator treatment head that can limit the radiation field range and switch between multiple treatment modes in a limited space is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a radiation accelerator treatment head, which can switch the radiation gear by moving the gear bracket, and can limit the radiation field range and switch between multiple treatment modes in a limited space, thereby improving the applicability of the equipment. Another purpose of the present invention is to provide a tumor radiotherapy device including the above-mentioned radiation accelerator treatment head.

[0006] In order to solve the above technical problems, the present invention provides a radiation accelerator treatment head, comprising a vertically arranged acceleration tube, a primary collimating cone installed at the lower end of the acceleration tube, and a multi-leaf collimator located below the primary collimating cone, a mobile gear bracket and a gear switching driver are installed below the primary collimating cone, a plurality of radiation gears are arranged on the mobile gear bracket, and the gear switching driver can drive the mobile gear bracket to move so that different radiation gears are aligned with the primary collimating cone to switch the treatment mode.

[0007] Preferably, the mobile gear bracket is provided with a non-uniform gear and a uniform gear in parallel in the horizontal direction, the non-uniform gear is a vertical through hole for outputting non-uniform high-dose rate mode rays, the uniform gear is a vertical through hole in which a uniformizer is arranged for outputting uniform ordinary mode rays, and the gear switching driver can drive the mobile gear bracket to move horizontally.

[0008] Preferably, a vertical conical hole is provided in the middle of the primary collimating cone, the diameter of the conical hole gradually increases from top to bottom, and the vertical through holes at the non-uniform gear and the uniform gear are conical holes that expand the conical hole.

[0009] Preferably, the outer periphery of the accelerating tube is covered with multi-layer stacked lead protection.

[0010] Preferably, it also includes a rotation driver for driving the accelerating tube to rotate along the beam center.

[0011] Preferably, a secondary collimating cone is installed between the primary collimating cone and the multi-leaf collimator, and also includes a reflector, a field lamp and an analog switching driver. The analog switching driver can drive the reflector to move to a preset position so that the light beam of the field lamp is reflected by the reflector and passes through the multi-leaf collimator to the patient plane.

[0012] Preferably, the secondary collimating cone includes a fixed secondary collimating cone and a movable secondary collimating cone, the fixed secondary collimating cone is installed below the primary collimating cone, and the movable secondary collimating cone is installed below the fixed secondary collimating cone, and the analog switching driver can synchronously move the movable secondary collimating cone and the reflector to align the movable secondary collimating cone with the fixed secondary collimating cone, or move the reflector to a preset position.

[0013] Preferably, the multi-leaf collimator comprises upper blades and lower blades, the number of the lower blades is greater than the number of the upper blades, and the front end edge of the side surface of each upper blade and each lower blade is provided with a right-angle chamfer.

[0014] Preferably, a fixing seat and an angle adjustment device are installed below the field lamp.

[0015] The present invention provides a tumor radiotherapy device, comprising a radiation accelerator treatment head, wherein the radiation accelerator treatment head is specifically any one of the radiation accelerator treatment heads described above.

[0016] The present invention provides a radiation accelerator treatment head, comprising a vertically arranged acceleration tube, a primary collimator cone installed at the lower end of the acceleration tube, and a multi-leaf collimator located below the primary collimator cone, a mobile gear bracket and a gear switching driver are installed below the primary collimator cone, a plurality of radiation gears are arranged on the mobile gear bracket, and the gear switching driver can drive the mobile gear bracket to move so that different radiation gears are aligned with the primary collimator cone to switch the treatment mode. The gear switching driver drives the mobile gear bracket to move, thereby realizing the switching of radiation gears, and can realize the limitation of the radiation field range and the switching of multiple treatment modes in a limited space, so that the device integrates multiple treatment modes, and the gear switching is convenient and fast, which improves the applicability of the device and can meet the clinical needs of fast, safe and accurate.

[0017] The present invention also provides a tumor radiotherapy device including the above-mentioned ray accelerator treatment head. Since the above-mentioned ray accelerator treatment head has the above-mentioned technical effects, the above-mentioned tumor radiotherapy device should also have the same technical effects, which will not be introduced in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a specific implementation of the radiation accelerator treatment head provided by the present invention;

[0019] Figure 2 A schematic diagram of non-uniform gear positions of a specific implementation of the radiation accelerator treatment head provided by the present invention;

[0020] Figure 3 A schematic diagram of the even gear positions of a specific implementation of the radiation accelerator treatment head provided by the present invention;

[0021] Figure 4 A schematic diagram of a working beam of a specific embodiment of the radiation accelerator treatment head provided by the present invention;

[0022] Figure 5 A schematic diagram of a simulated beam of a specific implementation of the ray accelerator treatment head provided by the present invention. DETAILED DESCRIPTION

[0023] The core of the present invention is to provide a radiation accelerator treatment head, which can switch the radiation gear by moving the gear bracket, and can limit the radiation field range and switch between multiple treatment modes in a limited space, thereby improving the applicability of the equipment. Another core of the present invention is to provide a tumor radiotherapy device including the above-mentioned radiation accelerator treatment head.

[0024] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Please refer to Figures 1 to 5 , Figure 1 A schematic structural diagram of a specific implementation of the radiation accelerator treatment head provided by the present invention; Figure 2 A schematic diagram of non-uniform gear positions of a specific implementation of the radiation accelerator treatment head provided by the present invention; Figure 3 A schematic diagram of the even gear positions of a specific implementation of the radiation accelerator treatment head provided by the present invention; Figure 4 A schematic diagram of a working beam of a specific embodiment of the radiation accelerator treatment head provided by the present invention; Figure 5 A schematic diagram of a simulated beam of a specific implementation of the ray accelerator treatment head provided by the present invention.

[0026] A specific embodiment of the present invention provides a radiation accelerator treatment head, including an accelerating tube 1, a primary collimating cone 2, a multi-leaf collimator 3, a mobile gear bracket 6 and a gear switching driver 6-3. The accelerating tube 1 is vertically arranged to accelerate electrons and output high-energy rays for target shooting. The primary collimating cone 2 is installed at the lower end of the accelerating tube 1 to limit the high-energy beam within a certain range. The multi-leaf collimator 3 is located below the primary collimating cone 2 to shape the beam so that the beam shape is basically consistent with the tumor shape on the patient plane to irradiate the tumor. The mobile gear bracket 6 is installed below the primary collimating cone 2 and is connected to the gear switching driver 6-3. A plurality of radiation gears are arranged on the mobile gear bracket 6. The gear switching driver 6-3 drives the mobile gear bracket 6 to move so that different radiation gears are aligned with the primary collimating cone 2 to switch the treatment mode.

[0027] The gear switching driver 6-3 drives the mobile gear bracket 6 to move, thereby realizing the switching of the radiation gear, so that the radiation emitted by the accelerating tube 1 is irradiated downward through different gears to form different types of radiation, corresponding to different treatment modes, and can realize the limitation of the radiation field range and the switching of multiple treatment modes in a limited space, so that the equipment integrates multiple treatment modes, and the gear switching is convenient and fast, thereby improving the applicability of the equipment and meeting the clinical needs of fast, safe and accurate.

[0028] In the ray accelerator treatment head provided in the specific embodiment of the present invention, the mobile gear bracket 6 is provided with a non-uniform gear 6-1 and a uniform gear 6-2, and the two gears are arranged in parallel in the horizontal direction. The non-uniform gear 6-1 is a vertical through hole, and after the beam passes directly, a non-uniform high-dose rate mode ray is output, which is used for the non-uniform treatment mode. The uniform gear 6-2 is a vertical through hole in which a uniformizer is arranged, and the beam will be processed by the uniformizer to output a uniformed common mode ray, which is used for the uniform treatment mode to improve the irradiation effect of a large-size field. More different gears can be added to provide different types of beams, further improving the applicability of the equipment.

[0029] Since the two ray gears are arranged horizontally, the gear switching driver 6-3 drives the mobile gear bracket 6 to move horizontally to realize the gear switching. The mobile gear bracket 6 is a horizontal bracket, and the two gears are arranged side by side in the middle of the horizontal bracket. The gear switching driver 6-3 can be driven by a motor installed at one end of the horizontal bracket, and other types of drivers can also be used.

[0030] In order to ensure the normal irradiation of the beam, a vertical conical hole is provided in the middle of the primary collimating cone 2, and the diameter of the conical hole gradually increases from top to bottom, that is, the primary collimating cone 2 is made of a hollow high-density material, and the hollow shape is conical, and the size of the taper limits the maximum beam area reaching the patient plane. At the same time, the vertical through holes at the non-uniform gear 6-1 and the uniform gear 6-2 are conical holes that expand the conical holes, that is, after the gear is aligned with the primary collimating cone 2, the conical hole at the gear expands the conical hole of the primary collimating cone 2 to form a larger conical hole.

[0031] The outer periphery of the accelerating tube 1 is covered with a multi-layer stacked lead protection 4 to prevent radiation leakage. A rotation driver is also provided to drive the accelerating tube 1 to rotate along the center of the beam. The rotation angle is selected within the range of 0 to 360 degrees according to design requirements. By rotating, the tumor can be irradiated conformally from more angles to improve conformity.

[0032] On the basis of the radiation accelerator treatment head provided in the above-mentioned specific embodiments, a secondary collimator cone 5 is further installed between the primary collimator cone 2 and the multi-leaf collimator 3, and is equipped with a reflector 7, a field lamp 8 and an analog switching driver 9. A conical hole is also provided on the secondary collimator cone 5, which forms a complete beam-limiting cone with the primary collimator cone 2 and the hole on the gear.

[0033] A fixing seat and an angle adjustment device are installed below the field lamp 8. The angles of the reflector 7 and the field lamp 8 are pre-adjusted. After the simulated switching driver 9 moves the reflector 7 to the preset position, the light beam of the field lamp 8 is reflected by the reflector 7 and passes through the multi-leaf collimator 3 to the patient plane. When the shape of the beam needs to be checked, the reflector 7 will be moved into position under the drive of the simulated switching driver 9, and the light beam of the field lamp 8 will be projected onto the multi-leaf collimator 3 after reflection. The unblocked light will pass through the multi-leaf collimator 3 to form a tumor shape on the patient plane, that is, through the light beam simulation during positioning, the irradiated part and shape can be intuitively seen, and the light beam simulation is performed. After the simulation is completed, the reflector 7 can be moved back to its original position. The simulated switching driver 9 can be a motor or other types of drivers.

[0034] In order to improve the anti-leakage effect, the secondary collimating cone 5 includes a fixed secondary collimating cone 5-1 and a movable secondary collimating cone 5-2. The fixed secondary collimating cone 5-1 is installed below the primary collimating cone 2, and the movable secondary collimating cone 5-2 is installed below the fixed secondary collimating cone 5-1. The analog switching driver 9 can synchronously move the movable secondary collimating cone 5-2 and the reflector 7, that is, control the positions of the two to be interchanged, so that the reflector 7 moves to a preset position, and the field lamp 8 cooperates to simulate the beam shape on the patient plane, or makes the movable secondary collimating cone 5-2 align with the fixed secondary collimating cone 5-1. After the reflector 7 is removed, the originally separated secondary collimating cone 5 is combined into one, which can effectively reduce leakage radiation. The secondary collimating cone 5 is integrated with the movable reflector 7, and the functions of simulating the beam using the light field and effectively reducing leakage radiation are satisfied in a limited space.

[0035] In the radiation accelerator treatment head provided in the specific embodiment of the present invention, the multi-leaf collimator 3 includes upper blades 3-1 and lower blades 3-2, the number of lower blades 3-2 is greater than the number of upper blades 3-1, and the front edge of the side of each upper blade 3-1 and each lower blade 3-2 is provided with a right-angle chamfer. The front edge of the side of each blade is provided with a right-angle chamfer. Each blade can stay at any position within the range of motion, and the multiple blade stay positions are combined together to form different holes, the number of which can be one or more. The beam passes through these holes, and a dose distribution that changes in a fixed ratio with the same shape as the hole can be formed on the patient plane.

[0036] During the treatment process, each driver drives the blades to move to form an irradiation hole that matches the shape of the tumor. The rays pass through the irradiation hole and are projected onto the tumor. By setting up a multi-layer structure and setting a right-angle chamfer at the front end of the blade side, it is more effectively close to the edge of the tumor compared to the existing right-angle end face, thereby achieving a better field conformal effect, thereby improving the field conformal resolution, reducing radiation leakage, and improving the field conversion efficiency.

[0037] It is arranged in two layers, and the gaps between adjacent upper blades 3-1 and the gaps between adjacent lower blades 3-2 are arranged in an alternating manner. This structure makes the beam passing through the gaps between the upper blades 3-1 must pass through the entire height of the lower blades 3-2 to reach the patient plane, which will greatly reduce the dose leaked to the patient plane. The upper blades 3-1 automatically follow and shield the lower blades 3-2 to avoid the direct leakage of rays caused by the gaps between the lower relative blades. At the same time, the conformity between the hole and the tumor can be further improved to half the width of a single blade. Specifically, the number of lower blades 3-2 is greater than the number of upper blades 3-1, which effectively reduces radiation leakage. A moving gap of 0.1mm to 0.2mm is set between adjacent blades, and the chamfer width is one-quarter of the blade width. The combination of two layers of blades can still form a conventional rectangular and square radiation field without being affected by the chamfer. The size and arrangement of each component can also be adjusted according to the situation, all within the protection scope of the present invention.

[0038] In addition to the above-mentioned ray accelerator treatment head, a specific embodiment of the present invention further provides a tumor radiotherapy device including the above-mentioned ray accelerator treatment head. For the structures of other parts of the tumor radiotherapy device, please refer to the prior art and will not be described in detail herein.

[0039] The above is a detailed introduction to the ray accelerator treatment head and tumor radiotherapy equipment provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A radiation accelerator treatment head, comprising a vertically arranged accelerating tube (1), a primary collimating cone (2) mounted at the lower end of the accelerating tube (1), and a multi-leaf collimator (3) located below the primary collimating cone (2), characterized in that: A movable gear bracket (6) and a gear switching driver (6-3) are installed below the primary collimating cone (2); a plurality of ray gears are arranged on the movable gear bracket (6); and the gear switching driver (6-3) can drive the movable gear bracket (6) to move so that different ray gears are aligned with the primary collimating cone (2) to switch the treatment mode; A secondary collimator cone (5) is installed between the primary collimator cone (2) and the multi-leaf collimator (3), and further comprises a reflector (7), a field lamp (8) and an analog switching driver (9), wherein the analog switching driver (9) is capable of driving the reflector (7) to move to a preset position so that the light beam of the field lamp (8) is reflected by the reflector (7) and passes through the multi-leaf collimator (3) to the patient plane; The secondary collimating cone (5) comprises a fixed secondary collimating cone (5-1) and a movable secondary collimating cone (5-2); the fixed secondary collimating cone (5-1) is installed below the primary collimating cone (2); the movable secondary collimating cone (5-2) is installed below the fixed secondary collimating cone (5-1); the analog switching driver (9) is capable of synchronously moving the movable secondary collimating cone (5-2) and the reflector (7) so that the movable secondary collimating cone (5-2) is aligned with the fixed secondary collimating cone (5-1), or the reflector (7) is moved to a preset position.

2. The radiation accelerator treatment head according to claim 1, characterized in that: The mobile gear bracket (6) is provided with a non-uniform gear (6-1) and a uniform gear (6-2) in parallel along the horizontal direction; the non-uniform gear (6-1) is a vertical through hole for outputting non-uniform high-dose rate mode rays; the uniform gear (6-2) is a vertical through hole in which a uniformizer is arranged for outputting uniform common mode rays; the gear switching driver (6-3) is capable of driving the mobile gear bracket (6) to move horizontally.

3. The radiation accelerator treatment head according to claim 2, characterized in that: A vertical conical hole is arranged in the middle of the primary collimating cone (2), the diameter of the conical hole gradually increases from top to bottom, and the vertical through holes at the non-uniform gear position (6-1) and the uniform gear position (6-2) are conical holes that expand the conical hole.

4. The radiation accelerator treatment head according to claim 1, characterized in that: The outer periphery of the accelerating tube (1) is covered with a plurality of stacked lead protection layers (4).

5. The radiation accelerator treatment head according to claim 1, characterized in that: It also comprises a rotation driver for driving the accelerating tube (1) to rotate along the beam center.

6. The radiation accelerator treatment head according to claim 1, characterized in that: The multi-leaf collimator (3) comprises upper blades (3-1) and lower blades (3-2), the number of the lower blades (3-2) is greater than the number of the upper blades (3-1), and the front end edge of the side surface of each upper blade (3-1) and each lower blade (3-2) is provided with a right-angle chamfer.

7. The radiation accelerator treatment head according to claim 6, characterized in that: A fixing seat and an angle adjustment device are installed below the field lamp (8).

8. A tumor radiotherapy device, comprising a radiation accelerator treatment head, characterized in that: The radiation accelerator treatment head is specifically the radiation accelerator treatment head according to any one of claims 1 to 7.

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