Shielding system for ray detection device and ray detection device

Abstract

The utility model provides a shielding system for a ray detection device and the ray detection device. The shielding system comprises a surface layer and a carbon layer. Wherein the surface layer is provided with a hole which is formed corresponding to an imaging area of the ray detection device and penetrates through the surface layer along the thickness direction of the ray detection device. The carbon layer comprises a first carbon layer, a second carbon layer and a foam layer located between the first carbon layer and the second carbon layer, and the carbon layer is located on the side, away from the radiation source, of the surface layer and used for reducing scattered rays and retaining energy of the passing rays. When penetrating through the carbon layers, rays need to penetrate through the first carbon layer and the second carbon layer. The first carbon layer and the second carbon layer can absorb scattering of rays twice, so that scattering of X-rays can be effectively reduced, noise points during imaging of the ray detection device are reduced, and the quality performance of images is improved.

Description

Technical Field

[0001] This application relates to a shielding system for a radiation detection device and a radiation detection device. Background Technology

[0002] X-ray inspection equipment requires additional shielding to protect the electronic components on the panel and reduce the risk of accidents. X-rays are scattered by the shielding layer. If the shielding layer is made of metal, the scattering of X-rays can be very severe. This scattering degrades the quality of the acquired images.

[0003] CN118588726A discloses an image sensing panel, a flat panel detection device, and a method for manufacturing the image sensing panel. CN110010630A discloses a digital X-ray detector panel and an X-ray system including the same.

[0004] Therefore, how to improve the quality of images is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] Therefore, it is necessary to provide a shielding system for radiation detection devices to address the above problems, including:

[0006] A surface layer having holes corresponding to the imaging area of ​​the X-ray detection device and penetrating the surface layer along the thickness direction of the X-ray detection device; and

[0007] The carbon layer includes a first carbon layer, a second carbon layer, and a foam layer located between the first carbon layer and the second carbon layer. The carbon layer is located on the side of the surface layer away from the radiation source to reduce scattered rays and retain the energy of the transmitted rays.

[0008] In some embodiments, the surface layer is made of aluminum.

[0009] In some embodiments, a first air layer is formed between the carbon layer and the surface layer.

[0010] In some embodiments, a blocking layer is also included, which is disposed on the side of the surface layer near the radiation source and is used to cover electronic components located in the non-detection area of ​​the radiation detection device.

[0011] In some embodiments, the holes are covered with a protective film.

[0012] This application also provides a radiation detection device, including an image signal generation layer and any of the shielding systems described above.

[0013] The image signal generation layer is distributed on the side of the carbon layer away from the radiation source, and is used to absorb particles in the radiation and generate electrical signals accordingly.

[0014] In some embodiments, the image signal generation layer includes:

[0015] The scintillator layer is used to absorb particles in radiation and generate light.

[0016] The image layer is used to convert the light generated by the scintillator layer into electrical signals.

[0017] The scintillator layer is distributed between the image layer and the carbon layer.

[0018] In some embodiments, the image signal generation layer includes a photodiode array.

[0019] In some embodiments, a second air layer is formed between the image signal generation layer and the carbon layer.

[0020] In some embodiments, the scintillator layer is used to reduce the detection efficiency of high-energy X-rays.

[0021] The shielding system for X-ray detection devices provided in this application requires X-rays to pass through a first carbon layer and a second carbon layer when they pass through the carbon layer. The first carbon layer and the second carbon layer can absorb the scattering of X-rays twice, thus effectively reducing the scattering of X-rays, thereby reducing noise during imaging by the X-ray detection device and improving the quality of the image.

[0022] This application also provides a radiation detection device including the above-described shielding system, and has the aforementioned advantages. Attached Figure Description

[0023] The specific embodiments are described below by way of example and with reference to the accompanying drawings, wherein:

[0024] Figure 1 This is a schematic diagram illustrating the principle of X-ray propagation towards a radiation detection device.

[0025] Figure 2 A schematic diagram showing a large number of X-rays propagating towards a radiation detection device;

[0026] Figure 3 This is a schematic diagram of the X-ray imaging results;

[0027] Figure 4 A schematic diagram of the structure of a radiation detection device provided in a specific embodiment of this application;

[0028] Figure 5 for Figure 4 Schematic diagram of the medium-density X-ray detection device;

[0029] Figure 6 for Figure 5 A magnified view of A in the middle.

[0030] Figures 1 to 6The attached figures are labeled as follows:

[0031] 1. X-ray detection device; 101. Imaging area; 102. Non-imaging area; 11. Surface layer; 110. Carbon layer; 12. First carbon layer; 13. Foam layer; 14. Second carbon layer; 15. Second air layer; 120. Image signal generation layer; 16. Scintillator layer; 17. Image layer; 18. Blocking layer; 181. Connecting component; 182. Pivoting component; 2. Frame; 3. Radiation source. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] Figure 1 This diagram illustrates the principle of X-ray propagation into the image signal generation layer 120. (See diagram for example.) Figure 1 As shown, X-rays emitted from radiation source 3 may be absorbed and released by the outer electrons of atoms along their propagation, producing scattered rays. Unscattered X-rays propagate in a straight line to the X-ray detection device 1 and generate image signals. Some scattered rays change their propagation direction but still reach the X-ray detection device 1 and generate image signals; these scattered rays affect image quality and increase noise in the image. A portion of scattered rays, due to changes in their propagation direction, ultimately fail to reach the X-ray detection device 1. Figure 2 A schematic diagram is shown showing a large number of X-rays propagating towards the X-ray detection device 1. It can be seen from the diagram that the scattered rays propagate to various parts of the X-ray detection device 1, and their impact on the image is difficult to predict and difficult to eliminate through algorithms. Figure 3 This is a schematic diagram of X-ray imaging results. The point at the center of the image represents the ideal imaging result, while all other points are noise points. The presence of a large number of noise points will seriously affect the image quality.

[0039] Figure 4 A schematic diagram of the structure of a radiation detection device 1 provided in a specific embodiment is shown. For example... Figure 4 and Figure 5 As shown, the X-ray detection device 1 may include an imaging area 101 and a non-imaging area 102. The imaging area 101 is used to receive X-rays passing through the object under test and generate an image related to the object under test. The non-imaging area 102 is provided with electronic components that cooperate with the image signal generation layer 120.

[0040] Imaging area 101 is equipped with an image signal generation layer 120. After X-rays irradiate the image signal generation layer 120, the layer converts the image signal into an electrical signal, facilitating transmission and processing. X-rays scatter as they propagate into the image signal generation layer 120, affecting image quality. Therefore, it is necessary to reduce the amount of scattered X-rays imaged on the image signal generation layer 120. Furthermore, electronic components in non-imaging area 102 are susceptible to damage from prolonged X-ray exposure; therefore, these electronic components also require protection.

[0041] like Figure 6 As shown, this application provides a shielding system for a radiation detection device 1, which includes a surface layer 11 and a carbon layer 110. The surface layer 11 has holes corresponding to the imaging area 101 of the radiation detection device 1, penetrating the surface layer 11 along the thickness direction of the radiation detection device 1. The surface layer 11 has high structural strength and can withstand large loads. The surface layer 11 is positioned close to the radiation source 3, and during the detection process, the surface layer 11 can protect the carbon layer 110 and the radiation detection device 1.

[0042] Optionally, the surface layer 11 can be made of aluminum, which has high structural strength and can effectively protect the shielding system and the radiation detection device 1. Of course, in other embodiments, the surface layer 11 may also be made of other materials, which are not limited here.

[0043] like Figure 6 As shown, carbon layer 110 is located on the side of surface layer 11 away from radiation source 3. Carbon layer 110 includes a first carbon layer 12, a second carbon layer 14, and a foam layer 13 located between the first carbon layer 12 and the second carbon layer 14. Carbon layer 110 can reduce scattered rays and retain the energy of the transmitted rays.

[0044] The first carbon layer 12 and the second carbon layer 14 can be made of graphite, carbon fiber, or composite materials. Multiple channels can be formed within the carbon layer 110, running from the radiation source 3 to the X-ray detection device 1. X-rays can pass through these channels and ultimately reach the image signal generation layer 120 of the X-ray detection device 1. Therefore, the carbon layer 110 can retain the energy of the X-rays passing through the shielding system, ensuring that the X-rays passing through the shielding system are sufficient to form an image on the X-ray detection device 1. The channels are separated by radiation-absorbing material. When X-rays deviate from the direction from the radiation source 3 to the X-ray detection device 1, scattered rays are formed, which can affect image quality. However, when X-rays propagate within the carbon layer 110, the scattered rays are absorbed by the radiation-absorbing material, thereby reducing scattered rays and improving image quality.

[0045] Optionally, both the first carbon layer 12 and the second carbon layer 14 can be made of composite materials. In one specific embodiment of this application, the first carbon layer 12 includes two parallel ply layers and a composite layer located between the two ply layers. The ply layers can be made of carbon fiber, which has a low absorption rate for X-rays, thus retaining the energy of the rays passing through the shielding system. The composite layer can be made of carbon fiber and a heavy metal material with radiation absorption function. Specifically, the carbon fiber can form a channel portion, and the heavy metal material can form an absorption portion. The channel portion and the absorption portion can be alternately distributed along the direction parallel to the ply layers to form a strip or grid structure. The channel portion can be arranged between the two ply layers perpendicular to the ply layers or at a predetermined angle to the ply layers. Typically, the angle between the channel portion and the ply layer can be equal to the angle between the direction of X-ray propagation to the image signal generation layer 120 of the X-ray detection device 1 and the ply layer. Therefore, X-rays can propagate to the image signal generation layer 120 along the channel portion. The absorption portion is located on both sides of the channel portion in the direction parallel to the ply layer, see [reference]. Figure 4 The scattered rays will deviate from the direction of propagation towards the image signal generation layer 120, and thus will irradiate the absorption section. The absorption section can absorb the scattered rays and prevent them from continuing to propagate. Of course, the first carbon layer 12 and the second carbon layer 14 can also be made of different materials, and this is not limited here.

[0046] like Figure 6 As shown, a foam layer 13 is provided between the first carbon layer 12 and the second carbon layer 14. The foam layer 13 can be made of one or more materials such as latex, memory foam, or polyurethane foam. The foam layer 13 has a certain degree of flexibility. During the detection process, the foam layer 13 can buffer the impact and load on the first carbon layer 12, thereby reducing the risk of damage to the first carbon layer 12 and extending its service life. Moreover, foam is usually an organic polymer material with a low absorption rate of X-rays. Therefore, X-rays retain high energy after passing through the foam layer 13 and can be imaged on the image signal generation layer 120. In addition, the foam layer 13 is placed between the first carbon layer 12 and the second carbon layer 14 to avoid direct contact between the first carbon layer 12 and the second carbon layer 14, thereby reducing their interaction and extending the service life of the first carbon layer 12 and the second carbon layer 14. Of course, the material of the foam layer 13 can also be selected as needed and is not limited here.

[0047] In some embodiments, a first air layer is formed between the carbon layer 110 and the surface layer 11. The first air layer also acts as a buffer, preventing the carbon layer 110 from being damaged by impact. Furthermore, the air layer has a low absorption rate for X-rays and is less likely to cause X-ray scattering. Specifically, the shielding system may provide a first support portion along the edge between the surface layer 11 and the carbon layer 110, thereby creating a first air layer by placing the surface layer 11 and the carbon layer 110 at a certain distance. The material of the first support portion can be selected as needed and is not limited here.

[0048] In some embodiments, such as Figure 4 As shown, the shielding system also includes a blocking layer 18, which is disposed on the side of the surface layer 11 near the radiation source 3 and is used to cover electronic components located in the non-detection area of ​​the X-ray detection device 1. The blocking layer 18 can be made of lead, which has excellent radiation protection properties and can effectively absorb X-rays, preventing X-rays from passing through the shielding system and irradiating the electronic components in the non-detection area, thereby damaging the electronic components. Of course, the blocking layer 18 can also be made of other materials as needed, and there is no limitation here. The blocking layer 18 has a hole in the center corresponding to the position of the imaging area 101, through which X-rays can pass to irradiate the image signal generation layer 120, thereby forming an image on the image signal generation layer 120.

[0049] The barrier layer 18 also includes a pivot 182 and a locking member 181. For example... Figure 4 As shown, one side of the barrier layer 18 is pivotally connected to the frame 2 on which the X-ray inspection device 1 is mounted via a pivot 182. When repair or maintenance is required on the surface layer 11, carbon layer 110, image signal generation layer 120, or electronic components, the barrier layer 18 will obstruct the process. In this case, the barrier layer 18 can be flipped to allow for repair and maintenance operations. A locking member 181 can be positioned on the side of the barrier layer 18 away from the pivot 182. The locking member 181 can engage and fix the barrier layer 18 to the frame 2, thereby fixing the barrier layer 18 in a position covering the non-inspection area. This prevents damage to components caused by the barrier layer 18 flipping, and also prevents the barrier layer 18 from interfering with the normal operation of the inspection process.

[0050] In some embodiments, the pores of the surface layer 11 are covered with a protective film. The protective film protects the first carbon layer 12, preventing it from directly contacting the test object and causing damage to the first carbon layer 12. The protective film may be made of materials such as transparent plastic.

[0051] This application also provides a radiation detection device 1, including an image signal generation layer 120 and a shielding system of any of the above embodiments. The image signal generation layer 120 is distributed on the side of the carbon layer 110 away from the radiation source 3, and is used to absorb particles in the radiation and generate electrical signals accordingly.

[0052] After X-rays pass through the shielding system, they irradiate the image signal generation layer 120. The shielding system can effectively absorb the scattered rays through the first carbon layer 12 and the second carbon layer 14, thereby reducing the scattered rays from forming images on the image signal generation layer 120, reducing imaging noise, and improving imaging quality.

[0053] In some embodiments, such as Figure 6As shown, the image signal generation layer 120 includes a scintillator layer 16 and an image layer 17. The scintillator layer 16 is used to absorb particles in the radiation and generate light. The image layer 17 is used to convert the light generated by the scintillator layer 16 into an electrical signal. The scintillator layer 16 is distributed between the image layer 17 and the carbon layer 110.

[0054] Scintillators can be made of gadolinium oxysulfide ceramic material. Gadolinium oxysulfide ceramic scintillators have advantages such as high X-ray conversion efficiency, short afterglow, good irradiation stability, and non-hygroscopicity, making them suitable for applications in extremely fast X-ray imaging. Furthermore, gadolinium oxysulfide ceramics can be doped with rare earth ions to further improve the performance of the scintillator; for example, they can be doped with Pr... 3+ and Ce 3+ Co-doping. Of course, users may also use scintillators made of other materials, which is not limited here.

[0055] In some embodiments, the image layer 17 includes a photodiode array. The photodiode array can be a 1024×1024 matrix, and the imaging area 101 formed by the photodiodes has a resolution of 1024 pixels × 1024 pixels. The spacing between two adjacent photodiodes can be 400 μm. The imaging area 101 can specifically be a square region with a width of 410 mm. Of course, in other embodiments, the distribution and number of photodiodes can be set according to user needs and are not limited here.

[0056] Optionally, the photodiode may be specifically an amorphous silicon sensor, with the peak sensitivity of the amorphous silicon sensor array at the green light wavelength.

[0057] In some embodiments, a second air layer 15 is formed between the image signal generation layer 120 and the carbon layer 110. The second air layer 15 can act as a buffer between the carbon layer 110 and the scintillator layer 16, preventing the scintillator layer 16 from being damaged by impact.

[0058] In some embodiments, the scintillator layer 16 can reduce the detection efficiency for high-energy X-rays. High-energy X-rays typically refer to X-rays exceeding 5 MeV. The X-ray detection device 1 provided in this application can be applied to medical devices, which typically use low-energy X-rays for detection, thus requiring a reduction in the detection efficiency for high-energy X-rays to avoid the influence of high-energy X-rays on the detection results. This embodiment uses a gadolinium oxysulfide ceramic scintillator, which has a lower detection efficiency for high-energy X-rays, thus reducing the influence of high-energy X-rays on the detection results.

[0059] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A shielding system for a radiation detection apparatus, characterized by, The radiation detecting apparatus comprises: a surface layer having a hole corresponding to an imaging area of the radiation detecting apparatus and penetrating the surface layer in a thickness direction of the radiation detecting apparatus; and a carbon layer including a first carbon layer, a second carbon layer, and a foam layer between the first carbon layer and the second carbon layer, the carbon layer being located on a side of the surface layer away from a radiation source, for reducing scattered radiation and preserving energy of the passing radiation. The surface layer is made of aluminum.

2. The shielding system of claim 1, wherein, A first air layer is formed between the carbon layer and the surface layer.

3. The shielding system of claim 1, wherein, A barrier layer is further included, the barrier layer being arranged on a side of the surface layer close to the radiation source, and covering electronic components located in a non-imaging area of the radiation detecting apparatus.

4. The shielding system of claim 1, wherein, The hole is covered with a protective film.

5. The shielding system of claim 1, wherein, The radiation detecting apparatus further comprises an image signal generating layer and the shielding system according to any one of claims 1 to 5, 6. A radiation detection device characterized by comprising: the image signal generating layer being arranged on a side of the carbon layer away from the radiation source, for absorbing particles in the radiation and generating an electric signal therefrom. The image signal generating layer comprises:

7. The radiation detection apparatus according to claim 6, wherein a scintillator layer for absorbing particles in the radiation and generating light, and an image layer for converting the light generated by the scintillator layer into an electric signal, the scintillator layer being arranged between the image layer and the carbon layer. The image layer comprises a photodiode array.

8. The radiation detection apparatus according to claim 7, wherein A second air layer is formed between the image signal generating layer and the carbon layer.

9. The radiation detection apparatus according to claim 6, wherein The scintillator layer is used to reduce detection efficiency of high-energy X-rays.

10. The radiation detection apparatus according to claim 7, wherein ​

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