Target body module and boron neutron capture therapy system

Abstract

The utility model relates to the technical field of nuclear medicine radiotherapy, in particular to a target body module and a boron neutron capture therapy system. Wherein the target body module at least comprises a barrel body and a target body arranged at one end of the barrel body, at least one support extending in the length direction of the barrel body is arranged on the outer wall of the barrel body, and the support is provided with a horizontal supporting part. The boron neutron capture therapy system at least comprises a target body module and a beam shaping device, the beam shaping device is provided with a containing cavity, the inner wall of the containing cavity is provided with a containing groove corresponding to the support, and the containing groove is provided with a supporting face matched with the horizontal supporting part. When the target body module is replaced, in the process of disconnecting the target body module from the vacuum pipeline, supporting of the target body module is achieved through cooperation of the containing groove and the support, an additional supporting structure does not need to be arranged, the structure of the target body replacing system and the target body replacing technology are simpler, and the replacing efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear medicine radiotherapy, in particular to a target module and a boron neutron capture therapy system. Background Art

[0002] After long-term development, the application of nuclear technology in the medical field has been greatly improved. Nuclear medical imaging examinations and various radiotherapy methods have become an indispensable part of modern medicine. Accelerator Based Boron Neutron Capture Therapy (AB-BNCT) is a new treatment method for cancer developed in recent years. It first allows boron-containing targeted drugs to accumulate in cancer cells, and then the neutrons generated by the accelerator react with the boron element in the drug to generate high-energy particles in the cancer cells, thereby achieving the purpose of accurately killing cancer cells and avoiding damage to normal cells, thereby achieving better treatment effects.

[0003] The accelerator neutron source is a key device for producing neutrons required for treatment. It uses an accelerator to accelerate protons. High-energy protons bombard solid lithium targets through the nuclear reaction Li(p,n)Be to produce neutrons required for treatment. Therefore, the target body is the core component in the AB-BNCT system. Usually, lithium metal is used as the target material. During operation, the lithium target is continuously irradiated by the proton beam. Due to factors such as sputtering and temperature rise, its thickness will continue to decrease, resulting in a decrease in neutron yield. At the same time, the substrate material will be microscopically damaged internally under proton irradiation, which will affect the macroscopic properties of the material, such as heat transfer performance, and ultimately lead to cooling failure and rupture. Therefore, the target needs to be replaced before it exceeds its service life and its performance is significantly reduced.

[0004] In the AB-BNCT system, a moderator, a beam shaping device, etc. are arranged around the lithium target. In the traditional AB-BNCT system, a receiving cavity for accommodating a lithium target module is provided on the beam shaping device, one end of the lithium target module is fixedly connected to the vacuum pipe, and one end of the lithium target is extended into the receiving cavity, but there is no direct connection structure and support structure between the lithium target module and the receiving cavity.

[0005] The defects of the above AB-BNCT system are:

[0006] (1) Since there is no connection structure and support structure between the lithium target module and the accommodating chamber, when replacing the lithium target module, an additional support structure needs to be set up in the process of disconnecting the lithium target module from the vacuum pipe to ensure that the lithium target module does not fall after being disconnected from the vacuum pipe, resulting in a more complex structure of the lithium target replacement system and a more complicated lithium target replacement process.

[0007] (2) Since the lithium target needs to be continuously cooled during use, the cooling pipe is arranged along the gap between the lithium target module and the accommodating cavity, resulting in a larger gap between the lithium target module and the accommodating cavity and a larger opening of the accommodating cavity, which in turn leads to more neutron leakage. Summary of the invention

[0008] The technical problem to be solved by the utility model is to solve the technical defects in the prior art that the structure of the lithium target replacement system is relatively complex, the lithium target replacement process is relatively cumbersome, and the opening of the accommodating cavity is relatively large, resulting in more neutron leakage.

[0009] In order to solve the above technical problems, the technical solution provided by the utility model is as follows: a target module, comprising at least a cylinder and a target arranged at one end of the cylinder, the outer wall of the cylinder is provided with at least one bracket extending along the length direction of the cylinder, and the bracket is provided with a horizontal support part.

[0010] In a preferred embodiment, the bracket is provided with one, which is located at the bottom of the cylinder.

[0011] In a preferred embodiment, two brackets are provided and located on both sides of the cylinder.

[0012] In a preferred embodiment, the bracket further includes a vertical connection portion fixedly connected to the horizontal support portion.

[0013] In a preferred embodiment, a section adapted to the vertical connecting portion is provided on the outer wall of the cylinder.

[0014] In a preferred embodiment, the section is provided with a plurality of connection blind holes, and the vertical connection portion is provided with a plurality of connection through holes corresponding to the connection blind holes.

[0015] In a preferred embodiment, at least one rib is provided between the horizontal supporting portion and the vertical connecting portion.

[0016] This embodiment also provides a boron neutron capture therapy system, which at least includes the target module and the beam shaping device, wherein the beam shaping device is provided with a receiving cavity for accommodating the target module, and the inner wall of the receiving cavity is provided with a receiving groove corresponding to the bracket, and the receiving groove is provided with a supporting surface adapted to the horizontal supporting part.

[0017] A preferred embodiment further comprises a cooling pipeline connected to the target body, wherein the cooling pipeline extends in the receiving groove.

[0018] In a preferred embodiment, the cooling pipeline is arranged on the bracket.

[0019] Compared with the prior art, the target module and the boron neutron capture therapy system of this embodiment have the following beneficial effects:

[0020] (1) A bracket is provided on the outer wall of the cylinder, and the bracket is provided with a horizontal support portion. When the target module is replaced, the bracket can be used as a support structure, providing a structural basis for realizing the support of the target module by relying on its own structure.

[0021] (2) A receiving groove corresponding to the bracket is provided on the inner wall of the receiving cavity in the beam shaping device, and the receiving groove is provided with a supporting surface adapted to the horizontal supporting portion. When the target module is replaced, the target module is supported by the cooperation of the receiving groove and the bracket during the process of disconnecting the connection between the target module and the vacuum pipe. No additional supporting structure is required. The structure of the target module replacement system and the target module replacement process are simpler, and the replacement efficiency is higher.

[0022] (3) The cooling pipeline of the target body is arranged in the receiving groove. The receiving groove is not only used to support the target body module, but also provides space for the layout of the cooling pipeline, so that the gap between the target body module and the receiving cavity can be smaller, and the opening of the receiving cavity can be smaller, thereby reducing neutron leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of the target module of this embodiment;

[0024] Figure 2 for Figure 1 The schematic diagram of the structure of the target module in the explosion state is shown;

[0025] Figure 3 for Figure 1 A rear view of the target module shown;

[0026] Figure 4 for Figure 1 The schematic diagram of the structure of the target module configuration cooling pipeline is shown;

[0027] Figure 5 This is a schematic diagram of the structure of a beam shaping device in a boron neutron capture therapy system according to this embodiment;

[0028] Figure 6 The beam shaping device and the Figure 4 The schematic diagram of the assembly state of the target module shown;

[0029] Figure 7 It is a structural schematic diagram of an equivalent embodiment of the target module of this embodiment. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0031] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] A preferred target module 10 of this embodiment is as follows: Figure 1-3 As shown, it includes a cylinder 12, a connecting flange 13 arranged at one end of the cylinder 12, and a target 11 arranged at the other end of the cylinder 12. The cylinder 12 is preferably made of stainless steel, and the connecting flange 12 is provided with a plurality of flange connecting holes 131 along the circumferential direction for connecting with other pipelines.

[0034] In this embodiment, as a preference, the target body 11 includes a copper target substrate 111, a metal substrate 112 disposed on the target substrate 111 close to one side of the cylinder, and a lithium metal coating 113 disposed on the metal substrate 112. It should be noted that the use of lithium metal as a target material is a preferred embodiment of this embodiment, and other metals may also be used as target materials, such as beryllium metal. In addition, the metal substrate 112 is also a preferred embodiment of this embodiment, and its function is to make the incident protons finally stay in the metal substrate layer instead of entering the target substrate, thereby preventing the occurrence of hydrogen-induced bubbling and increasing the service life of the target body, wherein the material that can be used as the metal substrate includes vanadium, palladium, platinum, titanium, niobium or its alloys.

[0035] In this embodiment, a plurality of substrate connection holes 114 for connecting with the cylinder are arranged along the circumferential direction at the edge of the target substrate 111 .

[0036] As a special feature of this embodiment, a bracket 14 extending along the length direction of the cylinder is respectively provided on both sides of the cylinder 12 , and the bracket 14 is provided with a horizontal supporting portion 141 and a vertical connecting portion 142 fixedly connected to the horizontal supporting portion 141 .

[0037] As a preferred connection mode of the bracket 14, in this embodiment, a cut surface 121 adapted to the vertical connection portion 142 is provided on the outer wall of the cylinder 12, and the cut surface 121 is provided with a plurality of connection blind holes 122, and the connection blind holes 122 can be threaded holes or pin holes. Correspondingly, the vertical connection portion 142 is provided with a plurality of connection through holes 143 corresponding to the connection blind holes 122, and the bracket 14 is fixedly connected to the cylinder by screws or pins.

[0038] In this embodiment, two ribs 144 are provided near the ends of the horizontal support portion 141 and the vertical connection portion 142 , respectively fixedly connected to the horizontal support portion 141 and the vertical connection portion 142 , thereby improving the strength of the bracket.

[0039] The boron neutron capture therapy system of this embodiment is as follows: Figure 5 , Figure 6 As shown, it includes a beam shaping device 20 adapted to be connected to the aforementioned target module 10, wherein a receiving cavity 21 for accommodating the target module 10 is provided on the beam shaping device 20, and a receiving groove 22 corresponding to the bracket 14 is provided on the inner wall of the receiving cavity 21, and the receiving groove 22 is provided with a supporting surface 23 adapted to the horizontal supporting portion 141.

[0040] In the boron neutron capture therapy system of this embodiment, when replacing the target module 10, the target module 10 is disconnected from the vacuum pipe by the cooperation of the receiving groove and the bracket to support the target module, without the need to set up an additional supporting structure. The structure of the target module replacement system and the target module replacement process are simpler and the replacement efficiency is higher.

[0041] In this embodiment, Figure 4 , Figure 6 As shown, the target module 10 is further provided with a cooling pipeline 15 connected to the target 11, and the cooling pipeline 15 extends in the receiving groove 22, wherein the cooling pipeline is arranged on the bracket 14. In this embodiment, the cooling pipeline of the target is arranged in the receiving groove, which is not only used to support the target module, but also provides space for the layout of the cooling pipeline, so that the gap between the target module and the receiving cavity can be smaller, the opening of the receiving cavity can be smaller, and the neutron leakage can be less.

[0042] As an embodiment equivalent to the target module 10 of this embodiment, Figure 7As shown, the bracket 14 is provided with one, which is located at the bottom of the cylinder 12. Correspondingly, the accommodating groove in the accommodating cavity in the beam shaping device is also correspondingly arranged at the bottom of the accommodating cavity, and cooperates with the bracket 14 to realize the support of the target module during the target changing process.

[0043] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A target module, comprising at least a cylinder and a target disposed at one end of the cylinder, characterized in that: The outer wall of the cylinder is provided with at least one bracket extending along the length direction of the cylinder, and the bracket is provided with a horizontal supporting part.

2. The target module according to claim 1, characterized in that: The bracket is provided with one and is located at the bottom of the cylinder.

3. The target module according to claim 1, characterized in that: The brackets are provided with two and are located at two sides of the cylinder.

4. The target module according to claim 3, characterized in that: The bracket also includes a vertical connection portion fixedly connected to the horizontal support portion.

5. The target module according to claim 4, characterized in that: A section adapted to the vertical connecting portion is arranged on the outer wall of the cylinder.

6. The target module according to claim 5, characterized in that: The section is provided with a plurality of connection blind holes, and the vertical connection portion is provided with a plurality of connection through holes corresponding to the connection blind holes.

7. The target module according to claim 4, characterized in that: At least one rib is arranged between the horizontal supporting portion and the vertical connecting portion.

8. A boron neutron capture therapy system, characterized in that: At least comprising the target module and beam shaping device as described in any one of claims 1 to 7, wherein the beam shaping device is provided with a receiving cavity for accommodating the target module, the inner wall of the receiving cavity is provided with a receiving groove corresponding to the bracket, and the receiving groove is provided with a supporting surface adapted to the horizontal supporting portion.

9. The boron neutron capture therapy system according to claim 8, characterized in that: It also includes a cooling pipeline connected to the target body, and the cooling pipeline extends in the receiving groove.

10. The boron neutron capture therapy system according to claim 9, characterized in that: The cooling pipeline is arranged on the bracket.

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