Radiation shielding device for isotope application

Abstract

The utility model discloses a radiation shielding device for isotope application, which is characterized by comprising a first atomic number material layer, a second atomic number material layer and a third atomic number material layer which are sequentially arranged along a ray output direction, the atomic number of the first atomic number material layer < the atomic number of the second atomic number material layer < the atomic number of the third atomic number material layer. According to the utility model, low-atomic-number to high-atomic-number materials are sequentially adopted according to the output direction of rays, so that the beta radiation protection effect is better, the protection use of the nuclear medicine application is met, and the application is environment-friendly and harmless.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a radiation shielding device for isotope applicators, which is specifically used for shielding beta rays emitted by a beta ray applicator. Background Art

[0002] Currently, radionuclide patch therapy in China primarily uses applicators made from beta-emitting radionuclides, such as strontium-90 and phosphorus-32, to treat scars and hemangiomas. However, there are currently no suitable protective materials for normal skin tissue.

[0003] According to the "GBZ120-2020 Nuclear Medicine Radiation Protection Requirements", the recommended dressing protection material is 3mm rubber. After testing, it was found that the shielding of beta rays by rubber alone is not ideal and cannot effectively block the bremsstrahlung it produces. Another common dressing protection material is lead rubber, which is mainly used for the protection of X-rays and gamma rays. In addition, because it contains heavy metal lead, it may migrate to the surface of the rubber and then penetrate into the human body through the skin, mouth, etc., thereby endangering human health. Another type of material that uses lead-free protection uses rare earth elements instead of lead to solve potential health risks, but is essentially effective in protecting against X-rays or gamma rays. As for beta rays, the heavy atomic number materials in the protective material are evenly distributed, which easily produces more bremsstrahlung, which requires thicker shielding materials and cannot achieve the optimal protection effect. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a radiation shielding device for isotope application.

[0005] The utility model discloses a radiation shielding device for isotope application, comprising: a first atomic number material layer, a second atomic number material layer and a third atomic number material layer arranged in sequence along the ray output direction, the atomic number of the first atomic number material layer being less than the atomic number of the second atomic number material layer and less than the atomic number of the third atomic number material layer.

[0006] As a further improvement of the present invention, the material used for the first atomic number material layer includes one of carbon powder and aerogel particle powder.

[0007] As a further improvement of the present invention, the material used for the second atomic number material layer includes one of silicon dioxide, clay, clay, and kaolin.

[0008] As a further improvement of the present invention, the material used for the third atomic number material layer includes one of ferroferric oxide, ferrous oxide, iron powder, and silver powder.

[0009] As a further improvement of the present invention, the first atomic number material layer, the second atomic number material layer and the third atomic number material layer are all formed in a layered form within the substrate.

[0010] As a further improvement of the present invention, the matrix includes one of silica gel and rubber.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model adopts materials with low atomic numbers to high atomic numbers in sequence according to the output direction of the rays, has a better effect on beta radiation protection, meets the ionizing radiation shielding requirements of radionuclide application therapy, and is environmentally friendly and harmless. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of the radiation shielding device for isotope application disclosed in Example 1 of the present utility model;

[0014] Figure 2 This is a schematic structural diagram of the radiation shielding device for isotope application disclosed in Example 2 of the present utility model;

[0015] Figure 3 This is a schematic structural diagram of the radiation shielding device for isotope application disclosed in Example 3 of the present utility model.

[0016] In the picture:

[0017] 1. First atomic number material layer; 2. Second atomic number material layer; 3. Third atomic number material layer; 4. Contact layer. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0019] The present invention is described in further detail below with reference to the accompanying drawings:

[0020] Example 1:

[0021] like Figure 1As shown, the utility model provides a radiation shielding device for isotope application, comprising: a first atomic number material layer 1, a second atomic number material layer 2, and a third atomic number material layer 3 arranged in sequence along the ray output direction; the atomic number of the first atomic number material layer 1 is less than the atomic number of the second atomic number material layer 2 and less than the atomic number of the third atomic number material layer 3; wherein,

[0022] The utility model faces the direction of ray output, Figure 1 In the direction of the arrow shown, the first contact surface of the shielding device is defined as the bottom surface; for example, when using a phosphorus-32 applicator, the shielding direction needs to cover the upper surface of the applicator, and the end of the applicator that contacts the skin is the bottom surface; when using a strontium-90 applicator, the shielding material needs to be cut open to expose the lesion, and the end of the applicator that is away from the skin is the bottom surface. Figure 1 As shown, the ray output is from bottom to top, and the bottom of the material is the bottom surface.

[0023] The material used for the first atomic number material layer 1 of the present invention includes carbon powder or aerogel particle powder, with carbon powder being preferred. The first atomic number material layer 1 can be formed by evenly distributing the first atomic number material within or on the surface of a conventional substrate, such as silicone (food-grade or medical-grade silicone) or a rubber material such as TPU, rubber, butyl, or CMS, with silicone being preferred. The specific preparation method is also conventional, with a common method comprising mixing the first atomic number material with silicone and forming the resulting layer into a sheet. The thickness, density (amount of the first atomic number material added), and particle size of the first atomic number material layer 1 are adjusted accordingly based on the energy of the β-rays and the intended use. The purpose is to fully absorb the β-rays through the first atomic number material layer 1 and minimize bremsstrahlung radiation.

[0024] The material used for the second atomic number material layer 2 of the present invention includes one of silica, clay, clay, and kaolin, with silica powder being preferred. The second atomic number material layer 2 can be formed by evenly distributing the second atomic number material within or on the surface of a conventional substrate, such as silicone (food-grade or medical-grade silicone) or a rubber material such as TPU, rubber, butyl, or CMS, with silicone being preferred. The specific preparation method is also conventional, with a common method being to mix the second atomic number material with silicone and form the resulting layer into a sheet. The thickness, density (amount of the second atomic number material added), and particle size of the second atomic number material layer 2 are adjusted accordingly based on the energy of the β-rays and the intended use. The purpose is to further absorb β-rays and shield some bremsstrahlung radiation through the second atomic number material layer 2.

[0025] The material used for the third atomic number material layer 3 of the present invention includes one of ferroferric oxide, ferrous oxide, iron powder, and silver powder, with ferroferric oxide powder being preferred. The third atomic number material layer 3 can be formed by evenly distributing the third atomic number material within or on the surface of a substrate, where the substrate is a conventional substrate, such as silicone (food-grade or medical-grade silicone) or a rubber material such as TPU, rubber, butyl, or CMS, with silicone being preferred. The specific preparation method is also conventional, with a common method being to mix the third atomic number material with silicone and form the layer into a sheet. The thickness, density (amount of the third atomic number material added), and particle size of the third atomic number material layer 3 are adjusted accordingly based on the energy of the beta rays and the intended use. The purpose is to fully shield the generated bremsstrahlung radiation through the second atomic number material layer 2.

[0026] The first atomic number material layer 1, the second atomic number material layer 2 and the third atomic number material layer 3 of the present invention are pressed into one body, or fixed into one body by an external adhesive.

[0027] Furthermore, the type of silicone can be selected from addition type, addition polymerization type, room temperature curing type, high temperature curing type, etc.

[0028] The shielding device in this utility model is made of environmentally friendly and harmless materials. Silicone is hypoallergenic and highly flexible, allowing for direct skin contact. The remaining materials are also environmentally friendly and harmless, ensuring that even minor leakage will not harm human health. The resulting shielding device is suitable for use with phosphorus-32 shielding applications and can also be used to cut shielding materials for strontium-90 shielding applications.

[0029] Example 2:

[0030] like Figure 2 As shown, based on Example 1, Example 2 may choose to set a contact layer 4 on the bottom surface of the first atomic number material layer 1. The contact layer 4 may be a pure matrix, and the matrix is ​​a conventional matrix, such as silicone (food grade or medical grade silicone) or TPU, rubber, butyl, CMS and other rubber materials. Preferably, silicone is used as the contact layer 4; the thickness of the contact layer 4 is 0.01-0.5 mm, which can be in direct contact with the skin to increase comfort.

[0031] Example 3:

[0032] like Figure 3As shown, based on Example 2, Example 3 can optionally set a contact layer 4 on the bottom surface of the third atomic number material layer 3. The contact layer 4 can select a pure matrix, and the matrix is ​​a conventional matrix, such as silicone (food grade or medical grade silicone) or TPU, rubber, butyl, CMS and other rubber materials. Preferably, silicone is used as the contact layer 4; the thickness of the contact layer 4 is 0.01-0.5 mm, which can be in direct contact with the skin to increase comfort.

[0033] The advantages of the utility model are:

[0034] The utility model adopts materials with low atomic numbers to high atomic numbers in sequence according to the output direction of the rays, has a better effect on beta radiation protection, meets the ionizing radiation shielding requirements of radionuclide application therapy, and is environmentally friendly and harmless.

[0035] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A radiation shielding device for isotope application, characterized in that: include: A first atomic number material layer, a second atomic number material layer and a third atomic number material layer are sequentially arranged along the ray output direction, wherein the atomic number of the first atomic number material layer is less than the atomic number of the second atomic number material layer and is less than the atomic number of the third atomic number material layer.

2. The radiation shielding device for isotope application according to claim 1, characterized in that: The material used for the first atomic number material layer includes one of carbon powder and aerogel particle powder.

3. The radiation shielding device for isotope application according to claim 1, wherein: The material used for the second atomic number material layer includes one of silicon dioxide, clay, clay, and kaolin.

4. The radiation shielding device for isotope application according to claim 1, wherein: The material used for the third atomic number material layer includes one of ferroferric oxide, ferrous oxide, iron powder, and silver powder.

5. The radiation shielding device for isotope application according to any one of claims 1 to 3, characterized in that: The first atomic number material layer, the second atomic number material layer and the third atomic number material layer are all formed in a layered form within the substrate.

6. The radiation shielding device for isotope application according to claim 5, characterized in that: The matrix includes one of silica gel and rubber.

Images