A radiation protection device for superthermal neutron beams

Abstract

A radiation protection device for a superthermal neutron beam includes a base, a guide rail, a movable plate, and a chain lifting assembly. The guide rail is mounted on the base, and a slider is fitted onto the guide rail. The movable plate is connected to the slider, and a lead block is disposed within the movable plate. The chain lifting assembly is mounted on the base. The output shaft of a motor is connected to the input shaft of a reducer, and a gear is disposed within a chain box on the output shaft of the reducer. Slide grooves are provided on both sides of the chain box, and two chains are disposed in the two slide grooves respectively. One end of the two chains meshes with each other, and a common connecting block is disposed at the top of the meshed chains. The connecting block is connected to the bottom of the movable plate. The gear meshes with one of the chains. This invention provides a close proximity between the movable plate and the superthermal neutron beam exit head, allowing the lead block to absorb and shield the neutron beam's radiation energy as effectively as possible, thereby reducing the impact of radiation on the human body.

Description

Technical Field

[0001] This utility model relates to the field of boron neutron capture therapy technology, and in particular to a radiation protection device for superthermal neutron beams. Background Technology

[0002] Boron neutron capture therapy (BNCT) is a precision medicine technique in the field of cancer treatment, which has seen rapid development and widespread application in recent years. This technology has significant clinical advantages, particularly in the treatment of recurrent, invasive, and locally metastatic tumors. Numerous clinical cases worldwide have demonstrated the significant and reliable efficacy of BNCT in treating various solid tumors, including recurrent head and neck cancer, malignant brain tumors, melanoma, osteosarcoma, and breast cancer.

[0003] The basic principle of boron-neutron targeted therapy (BNCT) is to inject a targeted molecular drug carrying 10B (a stable, non-radioactive natural isotope) into the body. Due to the selectivity of the targeted drug, 10B can specifically accumulate within tumor tissue. Subsequently, the tumor site is externally irradiated using a precisely controlled low-energy hyperthermal neutron beam. During irradiation, the 10B within the tumor tissue is activated, triggering boron neutron capture. This process releases two heavy ions with high linear energy density (LET) and a range of only about 10 micrometers, equivalent to the size of a cancer cell. These heavy ions can directly break the double helix of tumor cell DNA, causing the tumor cells to die due to irreparable damage. Therefore, BNCT can achieve precise and targeted killing of cancer cells at the cellular level while avoiding damage to normal tissues.

[0004] The advantages of BNCT technology lie in its precision and efficiency. By precisely targeting the tumor tissue and combining it with external irradiation, it can directly kill tumor cells at the cellular level. This treatment method not only has outstanding efficacy against recurrent, invasive, and locally metastatic tumors, but also does not damage normal tissues during the treatment process. Therefore, BNCT technology holds an important position and role in the field of cancer treatment.

[0005] Existing radiation protection devices use a screw-driven moving plate assembly for radiation protection. The screw nut is set on the moving plate assembly, which results in the moving plate assembly occupying a large space in its thickness direction. The distance between the superheated neutron beam output head and the wall is short, resulting in a large distance between the moving plate assembly and the radiation head in the treatment room, and poor protection effect of the moving plate assembly.

[0006] Therefore, we propose a radiation protection device for superthermal neutron beams. Utility Model Content

[0007] In response to the shortcomings of the existing production technology, the applicant provides a radiation protection device for superheated neutron beams. The distance between the moving plate and the superheated neutron beam output head is relatively short, which allows the lead block to absorb and shield the radiation energy of the neutron beam as much as possible, thereby reducing the impact of radiation on the human body.

[0008] The technical solution adopted in this utility model is as follows:

[0009] A radiation protection device for superthermal neutron beams, comprising:

[0010] The base is set in a mounting groove in the ground;

[0011] A guide rail is mounted on the base, and a slider is fitted on the guide rail.

[0012] A movable plate is connected to a slider, and a lead block is installed inside the movable plate;

[0013] A chain-type lifting assembly, mounted on the base, is used to drive the moving plate to rise and fall;

[0014] The chain lifting assembly includes a motor, a reducer, a chain, and a chain box. The output shaft of the motor is connected to the input shaft of the reducer, and the output shaft of the reducer has gears installed inside the chain box.

[0015] The chain box has sliding grooves on both sides, and two chains are provided. The two chains are respectively placed in the two sliding grooves, and one end of the two chains meshes with each other. The top of the two chains after meshing is provided with the same connecting block, which is connected to the bottom of the moving plate; the gear meshes with one of the chains.

[0016] Its further features are:

[0017] The guide rail is provided in two parallel configurations, and each guide rail is equipped with a slider.

[0018] The lead blocks are irregularly shaped to reduce weight.

[0019] The moving block is made of steel.

[0020] The wall is equipped with a superheated neutron beam output head, and the floor is equipped with a treatment bed. The mounting slot is located between the superheated neutron beam output head and the treatment bed.

[0021] The maximum height of the base is lower than that of the superheated neutron beam exit head.

[0022] The beneficial effects of this utility model are as follows:

[0023] This invention features a compact and reasonable structure, and is easy to operate. The patient lies on the treatment bed, receiving treatment through the superheated neutron beam output head. After the superheated neutron beam output head completes the beam output, the motor operates. The motor's output shaft drives the reducer's input shaft to rotate, which in turn drives the gears to rotate. The gears drive the chains to move, which in turn drive the two chains to move upwards. This, in turn, drives the moving plate to move upwards along the guide rail. The moving plate blocks the superheated neutron beam output head. The close distance between the moving plate and the superheated neutron beam output head allows the lead block to absorb and shield the neutron beam's radiation energy as much as possible, thereby reducing the radiation's impact on the human body.

[0024] In addition, this utility model also has the following advantages:

[0025] (1) The lead plate is irregularly shaped. Compared with the structure of regular shape, it can reduce weight, and thus use smaller chain lifting components, thereby reducing the size of the entire radiation protection device, making the base bottom smaller, making the mounting groove smaller, facilitating the processing of the mounting groove, and lowering the cost. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 for Figure 1 Side view.

[0028] Figure 3 This is a schematic diagram of the lead block of this utility model.

[0029] Figure 4 This is a schematic diagram of the chain box and chain of this utility model.

[0030] Figure 5 This is a schematic diagram of the radiation protection device of this utility model in the mounting groove.

[0031] The components are as follows: 1. Base; 2. Guide rail; 3. Slider; 4. Chain lifting assembly; 401. Motor; 402. Reducer; 403. Chain; 404. Chain box; 405. Gear; 406. Slide; 407. Connecting block; 5. Moving plate; 6. Lead block; 7. Superheated neutron beam output head; 8. Treatment bed; 9. Mounting slot. Detailed Implementation

[0032] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0033] like Figures 1-5 As shown, a radiation protection device for a superthermal neutron beam includes a base 1, a guide rail 2 on the base 1, a slider 3 on the guide rail 2, and a movable plate 5 fixed on the slider 3.

[0034] In one embodiment, two guide rails 2 are provided, which are arranged in parallel. Each guide rail 2 is equipped with a slider 3, and the lifting and lowering of the moving plate 5 is limited by the cooperation of the guide rail 2 and the slider 3.

[0035] The base 1 is also equipped with a chain lifting assembly 4, which includes a motor 401, a reducer 402, a chain 403 and a chain box 404. The output shaft of the motor 401 is connected to the input shaft of the reducer 402. The reducer 402 is mounted on the chain box 404. The output shaft of the reducer 402 passes through the chain box 404. A gear 405 is mounted on the output shaft of the reducer 402 inside the chain box 404. The chain box 404 is mounted on the base 1.

[0036] Both sides of the chain box 404 are provided with slide grooves 406, and each slide groove 406 contains a sliding chain 403. The two chains 403 can mesh with each other, and the two chains 402 form a straight line after meshing. The top of the two meshing chains 402 is provided with the same connecting block 407, which is connected to the bottom of the moving plate 5. A gear 405 meshes with one of the chains 403, driving the chain 403 to move.

[0037] The movable plate 5 contains lead blocks 6, which can absorb and shield the radiation energy of the neutron beam, thereby reducing the impact of radiation on the human body.

[0038] A treatment bed 8 is set on the ground, and a superheated neutron beam emitter head 7 is set on the wall. An installation groove 9 is set on the ground between the superheated neutron beam emitter head 7 and the treatment bed 8. The radiation protection device is installed in the installation groove 9, that is, the base 1 is set in the installation groove 9. The highest height of the base 1 is lower than that of the superheated neutron beam emitter head 7. Before the moving plate 5 rises, the moving plate 5 is on one side of the base 1, and the highest height of the moving plate 5 is lower than that of the base 1. That is, the moving plate 5 is below the superheated neutron beam emitter head 7. After the superheated neutron beam emitter head 7 completes beam emission, the moving plate 5 is driven to rise by the chain lifting assembly 4. The lead block 6 inside the moving plate 5 can absorb and shield the radiation energy of the neutron beam, thereby reducing the radiation effect on the human body.

[0039] In this radiation protection device, the distance between the movable plate 5 and the superheated neutron beam output head 7 is only a few millimeters. The close distance between the movable plate 5 and the superheated neutron beam output head 7 allows the lead block 6 to absorb and shield the radiation energy of the neutron beam as much as possible, thereby reducing the impact of radiation on the human body.

[0040] The moving plate 5 is made of steel, which makes the moving plate 5 thinner, and thus the distance between the lead block 6 and the superheated neutron beam output head 7 is smaller.

[0041] In one embodiment, the lead plate 6 is irregularly shaped, which reduces weight compared to a regular shape, allowing for the use of a smaller chain lifting assembly 4, thereby reducing the overall size of the radiation protection device. This results in a smaller base 1 and a smaller mounting groove 9, facilitating the processing of the mounting groove 9 and reducing costs.

[0042] In practical use, the patient lies on the treatment bed 8 and receives treatment through the superheated neutron beam output head 7. After the superheated neutron beam output head 7 completes the output, the motor 401 operates. The output shaft of the motor 401 drives the input shaft of the reducer 402 to rotate. The output shaft of the reducer 402 drives the gear 405 to rotate. The gear 405 drives the chain 403 to move, which in turn drives the two chains 403 to move upward. This, in turn, drives the moving plate 5 to move upward along the guide rail 2. The moving plate 5 blocks the superheated neutron beam output head 7, and the lead block 6 in the moving plate 5 absorbs and shields the radiation energy of the neutron beam, thereby reducing the impact of radiation on the human body.

[0043] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A radiation protection device for an epithermal neutron beam, characterized in that, include: The base (1) is set in the mounting groove (9) on the ground; The guide rail (2) is set on the base (1), and the guide rail (2) is matched with the slider (3); The movable plate (5) is connected to the slider (3), and a lead block (6) is installed inside the movable plate (5); A chain lifting assembly (4) is installed on the base (1) and is used to drive the moving plate (5) to lift. Among them, the chain lifting assembly (4) includes a motor (401), a reducer (402), a chain (403) and a chain box (404). The output shaft of the motor (401) is connected to the input shaft of the reducer (402). The output shaft of the reducer (402) is provided with a gear (405) in the chain box (404). The chain box (404) has sliding grooves (406) on both sides. There are two chains (403), which are respectively placed in the two sliding grooves (406). One end of the two chains (403) meshes with each other. The top of the two chains (403) after meshing is provided with the same connecting block (407). The connecting block (407) is connected to the bottom of the moving plate (5). The gear (405) meshes with one of the chains (403).

2. A radiation protection device for an epithermal neutron beam as defined in claim 1, characterized in that: There are two guide rails (2), which are arranged in parallel, and each guide rail (2) is equipped with a slider (3).

3. A radiation protection device for an epithermal neutron beam as defined in claim 1, characterized in that: The lead block (6) is irregularly shaped, which reduces its weight.

4. A radiation protection device for an epithermal neutron beam as defined in claim 2, characterized in that: The movable plate (5) is made of steel.

5. A radiation protection device for an epithermal neutron beam as defined in claim 1, wherein: A superheated neutron beam output head (7) is installed on the wall, and a treatment bed (8) is installed on the ground. The mounting slot (9) is located between the superheated neutron beam output head (7) and the treatment bed (8).

6. A radiation protection device for an epithermal neutron beam as defined in claim 1, wherein: The highest height of the base (1) is lower than that of the superthermal neutron beam exit head (7).

Images