Shielding device for locally shielding rays in annular irradiation field

Abstract

The utility model discloses a shielding device for locally shielding rays in an annular irradiation field, and particularly relates to the field of ray shielding devices. Comprising a shielding plate, the shielding plate is connected with a plurality of shielding rods, the free ends of the shielding rods are jointly connected with a shielding ring, an experiment irradiation area is reserved between the shielding plate and the shielding ring, the shielding plate, the shielding rods and the shielding ring are all made of lead plates, and a plurality of supporting columns are circumferentially distributed at the bottom of the shielding ring. By adopting the technical scheme of the utility model, the problem that the existing strip-shaped shielding device cannot shield non-vertical receiving rays is solved, and the stability of an experiment is improved.

Description

Technical Field

[0001] This utility model relates to the field of radiation shielding devices, and in particular to a shielding device for locally shielding radiation in an annular irradiation field. Background Technology

[0002] In animal irradiation experiments, X-ray irradiators are commonly used to irradiate mice locally or whole-body. Local irradiation usually requires shielding other non-irradiated areas of the mouse. To address the issue of localized X-ray irradiation in small animals, lead plates / shielding boxes are typically used for shielding in practice. Existing X-ray shielding devices are generally long strips of lead plates or long strip shielding boxes. However, the rays emitted by some radiation sources are at an angle to the irradiated platform and are not received perpendicularly. Therefore, such long strip shielding devices cannot meet the irradiation shielding requirements of some radiation sources. Utility Model Content

[0003] The present invention aims to provide a shielding device for locally shielding rays in a ring-shaped irradiation field, which solves the problem that existing long strip-shaped shielding devices cannot shield non-vertically received rays.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A shielding device for locally shielding rays in an annular irradiation field includes a shielding plate, multiple shielding rods connected to the shielding plate, and a shielding ring connected to the free ends of the multiple shielding rods. An experimental irradiation area is left between the shielding plate and the shielding ring. The shielding plate, shielding rods, and shielding ring are all made of lead plates, and multiple support columns are distributed circumferentially at the bottom of the shielding ring.

[0005] Technical Solution Principle and Effects: This solution employs a ring-shaped, hollowed-out experimental irradiation area, effectively addressing the problem that existing long, strip-shaped shielding devices cannot shield against non-vertically received radiation. This ensures uniform dose rate within the ring-shaped radiation field, effectively shielding non-irradiated areas. Shielding rods maintain the stability of the shielding plate and ring, and support columns lift the shielding plate, rods, and ring off the ground, ensuring unimpeded breathing for the mice during irradiation.

[0006] Furthermore, the shielding ring is composed of circular arc segments and arc-shaped segments. The width of the circular arc segments on the shielding ring is equal, while the width of the arc-shaped segments on the shielding ring gradually increases.

[0007] With the above setup, the arc segment on the shielding ring can shield multiple mice of the same size from radiation. At the same time, due to the increased width of the arc segment on the shielding ring, it can shield mice of different sizes from radiation simultaneously, thereby enhancing the applicability of this solution.

[0008] Furthermore, the edge of the shielding plate is provided with a slide rail, and the shielding rod is slidably connected in the slide rail.

[0009] The above settings allow the shielding plate and the shielding ring to move relative to each other, which facilitates the adjustment of the position of the arc-shaped segment on the shielding ring and allows for the adjustment of the width of the shielding ring to accommodate mice of different sizes.

[0010] Furthermore, the upper surface of the shielding ring is provided with scale lines, and the scale value of the scale lines indicates the width of the shielding ring at this point.

[0011] With the above settings, the width of each part of the shielding ring can be clearly seen, thus quickly finding the placement area for the mouse.

[0012] Furthermore, the bottom of the shielding plate is circumferentially distributed with multiple limiting blocks. The limiting blocks have first arc-shaped holes on their front and rear sides and second arc-shaped holes on their left and right sides. The first and second arc-shaped holes are interconnected.

[0013] With the above settings, the mouse's head and forelimbs can be properly fixed by the first and second arc-shaped holes on the limiting block, thus maintaining their relative position. This avoids the problem of the experimenter touching the mouse during the movement of the shielding ring, which could cause changes in its body position, and ensures the accuracy of the radiation irradiation area.

[0014] Furthermore, the height of the limiting block is equal to the height of the support column.

[0015] The above configuration allows the limiting block and support column to simultaneously support the shielding plate and shielding ring, ensuring that the easily deformable lead plate will not experience uneven deformation due to its own gravity or other forces.

[0016] Furthermore, sponge pads are adhered to the inner walls of both the first and second arc-shaped holes.

[0017] With the above setup, the sponge pad can keep mice of different sizes confined while maintaining ventilation and preventing squeezing injuries to the mice.

[0018] Compared with existing technologies, the beneficial effects of this solution are:

[0019] 1. This design incorporates a ring-shaped shielding device, which can solve the shielding problem of a type of ring-shaped radiation field device, such as the Hitachi X-ray irradiator (MBR-152OR-3). In this type of irradiator, the area of ​​the radiation source at the top is smaller than the area of ​​the platform, resulting in a consistent radiation dose at the same radius within the circular platform. However, there is a slight error in the radiation dose received by the inner and outer rings. Using this shielding device, animals requiring localized radiation can be arranged in a ring within the irradiation field, resulting in a more stable total radiation dose, more uniform irradiation of the affected areas, and increased experimental stability.

[0020] 2. This solution can address the shielding requirements for a 400mm diameter annular irradiation field. Based on the body width of the anesthetized mice and the radius of the irradiation disk, approximately 10 mice can be irradiated per batch. This shielding device ensures that each mouse receives a consistent radiation dose within the annular irradiation field, whereas existing non-annular shielding devices cannot meet the shielding requirements in annular irradiation fields (the difference between the innermost ring radiation dose and the actual radiation dose rate of the outermost ring is approximately 10%). Attached Figure Description

[0021] Figure 1 This is a top-view axonometric view of a shielding device for locally shielding rays in a ring-shaped irradiation field according to this utility model;

[0022] Figure 2 This is a top view of a shielding device for locally shielding rays in a ring-shaped irradiation field according to the present invention;

[0023] Figure 3 This is an elevation view of a shielding device for locally shielding rays in a ring-shaped irradiation field, according to this utility model. Detailed Implementation

[0024] The present invention will be further described in detail below through specific embodiments:

[0025] The reference numerals in the accompanying drawings include: shielding plate 1, slide rail 2, shielding rod 3, shielding ring 4, support column 5, limiting block 6, first arc-shaped hole 7, and second arc-shaped hole 8.

[0026] Example 1

[0027] like Figures 1 to 3 As shown, a shielding device for locally shielding radiation in a ring-shaped irradiation field includes a shielding plate 1. Slide tracks 2 are integrally formed on both the upper and lower edges of the shielding plate 1. Multiple shielding rods 3 are slidably connected within the slide tracks 2. In this embodiment, there are six shielding rods 3, equidistantly distributed circumferentially on the outer side of the shielding plate 1. All the free ends of the shielding rods 3 are fixedly connected to a shielding ring 4. In this embodiment, the shielding ring 4 is composed of circular arc segments and arc-shaped segments. The width of the circular arc segments on the shielding ring 4 is equal, while the width of the arc-shaped segments gradually increases from the connection point with the circular arc segments to the other side. The upper surface of the shielding ring 4 is provided with scale lines, with the scale lines on the circular arc segments only located at the connection points with the arc-shaped segments. The scale value of the scale lines indicates the width of the shielding ring 4 at that point. An experimental irradiation area is left between the shielding plate 1 and the shielding ring 4. The shielding plate 1, shielding rods 3, and shielding ring 4 are all made of lead plates. Multiple support columns 5 are circumferentially distributed at the bottom of the shielding ring 4. In this embodiment, there are six support columns 5.

[0028] The bottom circumferential surface of the shielding plate 1 has multiple limiting holes, each containing a limiting block 6. This insertion method facilitates the replacement or removal of the limiting blocks 6. In this embodiment, ten limiting blocks 6 are used. First arc-shaped holes 7 penetrate the front and rear sides of each limiting block 6, and second arc-shaped holes 8 penetrate the left and right sides. The first arc-shaped holes 7 and the second arc-shaped holes 8 are interconnected. Sponge pads are adhered to the inner walls of both the first arc-shaped holes 7 and the second arc-shaped holes 8. Figure 1-3 The sponge pad is not shown in the figure. When using the sponge pad, it can be adhered to the inner surface of the first arc hole 7 and the second arc hole 8. The sponge pad can further restrain and limit the forelimbs and head of the mouse, while maintaining breathability and not causing damage to the mouse.

[0029] During the operation of this embodiment:

[0030] After anesthetizing the experimental mice, they were placed in the irradiation field. Mice of similar body length were positioned directly beneath the arc segment of the shielding ring 4, while mice of different lengths were positioned directly beneath the arc segment of the shielding ring 4. The mice under the arc segment were then gradually spaced out along the increasing width direction to ensure a consistent irradiation dose for each mouse. During mouse placement, the shielding device could be placed directly above the mice, and the shielding ring 4 could be rotated to position mice of different lengths accordingly.

[0031] After the mice are placed, the limiting block 6 at the bottom of the shielding plate 1 can be used to appropriately limit the mice. The first arc-shaped hole 7 can limit the head of the mouse by contact, while the forelimbs of the mouse can be placed in the second arc-shaped hole 8 for contact and limitation. Before radiation irradiation, the position of the mouse can be adjusted as needed to achieve different constraints.

[0032] Example 2

[0033] The only difference between this embodiment and embodiment 1 is that the bottom of the shielding plate 1 in this embodiment does not have a limiting block 6 and a sponge pad set in the limiting block 6.

[0034] The only difference between the working process of this embodiment and that of embodiment 1 is that the mice are simply placed according to their body length. After placement, the shielding device is placed directly above the mice. At this time, the arc segment and the curved segment are positioned directly above the corresponding mice by rotating the shielding ring 4.

[0035] The above are merely embodiments of this utility model. Commonly known structures and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A shielding device for locally shielding rays in a ring-shaped irradiation field, characterized in that: The shielding plate (1) is connected to a plurality of shielding rods (3), and the free ends of the plurality of shielding rods (3) are connected to a shielding ring (4). An experimental irradiation area is left between the shielding plate (1) and the shielding ring (4). The shielding plate (1), shielding rods (3) and shielding ring (4) are all made of lead plates. The bottom of the shielding ring (4) has a plurality of support columns (5) distributed circumferentially.

2. The shielding device for locally shielding rays in a ring-shaped irradiation field according to claim 1, characterized in that: The shielding ring (4) is composed of circular arc segments and arc segments. The width of the circular arc segments on the shielding ring (4) is equal, while the width of the arc segments on the shielding ring (4) gradually increases.

3. The shielding device for locally shielding rays in a ring-shaped irradiation field according to claim 2, characterized in that: The edge of the shielding plate (1) is provided with a slide rail (2), and the shielding rod (3) is slidably connected in the slide rail (2).

4. A shielding device for locally shielding rays in an annular irradiation field according to any one of claims 2 or 3, characterized in that: The upper surface of the shielding ring (4) is provided with scale lines, and the scale value of the scale lines indicates the width of the shielding ring (4) at this point.

5. A shielding device for locally shielding rays in a ring-shaped irradiation field according to claim 1, characterized in that: The bottom of the shielding plate (1) has a plurality of limiting blocks (6) distributed circumferentially. The limiting blocks (6) have first arc-shaped holes (7) on the front and rear sides and second arc-shaped holes (8) on the left and right sides. The first arc-shaped holes (7) and the second arc-shaped holes (8) are connected to each other.

6. A shielding device for locally shielding rays in a ring-shaped irradiation field according to claim 5, characterized in that: The height of the limiting block (6) is equal to the height of the support column (5).

7. A shielding device for locally shielding rays in a ring-shaped irradiation field according to claim 5, characterized in that: Sponge pads are adhered to the inner walls of the first arc-shaped hole (7) and the second arc-shaped hole (8).

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