A scatter grid component capable of dual-energy acquisition

Abstract

The present invention belongs to the technical field of CT, and particularly relates to an anti-scattering grid assembly capable of realizing dual-energy acquisition, which includes an anti-scattering grid. The anti-scattering grid is a one-piece formed mesh grid, including horizontally grid sheets and vertically grid sheets that cross and form. Both the horizontally grid sheets and the vertically grid sheets are in a focused and inclined shape. The bottom of the anti-scattering grid is provided with inverted U-shaped grooves distributed at intervals along the longitudinal direction; a filter plate, the filter plate is strip-shaped and is embedded and fixed in the inverted U-shaped grooves at the bottom of the anti-scattering grid; an upper cover plate, the upper cover plate covers and is fixed on the top of the anti-scattering grid; a lower cover plate, the lower cover plate covers and is fixed on the bottom of the anti-scattering grid. It not only realizes efficient scattered ray absorption and enables the detection plate to acquire high- and low-energy data, but also greatly simplifies the structural design, improves the processing accuracy and assembly efficiency; the one-piece formed mesh grid design, combined with the special inverted U-shaped groove structure, not only improves the overall strength, but also provides an accurate installation space for the filter plate.

Description

Technical Field

[0001] The present invention belongs to the technical field of CT, and particularly relates to an anti-scattering grid assembly. Background Art

[0002] In the field of CT, dual-energy CT is often adopted. There are generally two implementation methods. One is a dual-energy radiation source paired with a single-energy detector, and the other is a single-energy radiation source paired with a dual-energy detector. The latter is a more economical and commonly used method, which makes the development of dual-energy detectors inevitable. Currently, the implementation methods of dual-energy detectors are as follows:

[0003] A ray filter is arranged between two detection plates (detection plate: including a PD plate and a scintillator, and the scintillators are arranged in an array on the PD plate) to form a "sandwich" structure. The uppermost detection plate receives low-energy rays and converts them into electrical signals. After the rays pass through the filter, high-energy rays are obtained, and then are received by the lower detection plate and converted into electrical signals, so as to obtain the original data scanned under two different energy spectrum distributions.

[0004] Or a single detection plate is adopted. A fixing plate is arranged above the scintillator of the detection plate, and ray filters are arranged at intervals on the fixing plate. The arrangement positions of the ray filters correspond to those of the scintillators. The scintillators not covered by the ray filters receive low-energy rays, and the scintillators covered by the ray filters receive high-energy rays, so as to realize dual-energy data acquisition.

[0005] However, there are still some problems in the existing dual-energy detector technologies. For example, CN113252714A discloses a structure with filtering and anti-scattering and a dual-energy CT detector. This technology adopts a double-detection-plate scheme with a "sandwich" structure. Although this scheme can achieve dual-energy imaging, since two detection plates are used, the overall cost and maintenance cost of the whole machine are greatly increased. In addition, this structure also increases the complexity of the system, which may affect the stability and reliability of the system.

[0006] On the other hand, CN211826557U describes a high-low energy anti-scattering combination device and a dual-energy CT system. This technology adopts a scheme of a single detection plate plus a fixing plate. Ray filters are arranged at intervals on the fixing plate to realize high-low energy data acquisition. However, there are some technical problems with this scheme. First, the fixing plate usually adopts low-density materials (such as carbon fiber or polyester materials) to ensure high ray transmittance, but such materials are relatively soft and it is difficult to ensure the processing accuracy. Second, in order to improve the ray penetration rate as much as possible, the thickness of the fixing plate needs to be as thin as possible, which easily causes the fixing plate to deform after processing, thus affecting the assembly accuracy. Finally, this structure also faces problems such as large cumulative positioning errors and high assembly process difficulty, resulting in a low yield rate.

[0007] In addition, although a CT detector anti-scattering grid disclosed in CN117064422A solves the problem of scattered rays to a certain extent, its structure is complex, the manufacturing cost is high, and it is difficult to effectively separate high-energy and low-energy rays. Summary of the Invention

[0008] Facing these problems, there is an urgent need for a new type of anti-scattering grid component that can not only achieve dual-energy CT imaging, effectively solve the influence of scattered rays, but also simplify the structure, reduce the cost, improve the processing accuracy and assembly efficiency.

[0009] The embodiment of the present invention adopts the following technical solutions: An anti-scattering grid component capable of realizing dual-energy acquisition, comprising:

[0010] An anti-scattering grid, the anti-scattering grid is an integrally formed mesh grid, including transverse grid sheets and longitudinal grid sheets that cross each other, the transverse grid sheets and the longitudinal grid sheets are both in a focused tilt, and the bottom of the anti-scattering grid is longitudinally spaced with inverted U-shaped grooves;

[0011] A filter plate, the filter plate is strip-shaped and is embedded and fixed in the inverted U-shaped groove at the bottom of the anti-scattering grid;

[0012] An upper cover plate, the upper cover plate covers and is fixed on the top of the anti-scattering grid;

[0013] A lower cover plate, the lower cover plate covers and is fixed on the bottom of the anti-scattering grid;

[0014] Wherein, the bottom grid of the anti-scattering grid corresponds to the scintillators on the detection plate one by one, and the inverted U-shaped grooves longitudinally and intermittently cover part of the scintillators.

[0015] Preferably, the cross-section of the transverse grid sheet includes:

[0016] Top one, the top one has a thinner thickness and a longer length;

[0017] Middle part, the middle part has a greater thickness than the top one and a shorter length than the top one;

[0018] Root one, one side of the root one is concave to form an inverted L-shaped structure, and the inverted L-shaped structures of two adjacent transverse grid sheets are opposite to each other to form the inverted U-shaped groove.

[0019] Preferably, the cross-section of the longitudinal grid sheet includes:

[0020] Top two, the top two has a thinner thickness and a longer length;

[0021] Root two, the root two has a greater thickness than the top two and a shorter length than the top two;

[0022] Among them, the roots of any cross-section of a single longitudinal grid sheet have different dimensions. The root of the cross-section at the inverted U-shaped groove is shorter, and the root at the non-inverted U-shaped groove is longer.

[0023] Preferably, the planar projection shape of the longitudinal grid sheet is a rectangular sheet, and the inverted U-shaped grooves are distributed at intervals at the bottom.

[0024] Preferably, two bosses extend from the bottom of the outermost longitudinal grid sheet of the anti-scattering grid. Two parallel rib plates are provided on each boss. The rib plates connect the boss and the outer wall of the grid. Positioning holes and connection holes are provided on both sides of the bosses.

[0025] Preferably, the inverted U-shaped groove further includes:

[0026] A small inverted U-shaped groove cut upward along the side wall of the groove at the top corner of the groove. The height of the small inverted U-shaped groove is 0.2 - 0.4 mm, and the width is 0.4 - 0.6 mm.

[0027] Preferably, the length, width, and height of the filter sheet are the same as the dimensions of the bottom groove of the anti-scattering grid. The filter sheet is adhesively fixed to the top surface and side wall of the inverted U-shaped groove.

[0028] Preferably, both the upper cover plate and the lower cover plate are rectangular sheets, covering all the grid holes of the anti-scattering grid.

[0029] Preferably, the anti-scattering grid is made of a high-density material. The scintillator covered by the inverted U-shaped groove on the detection plate is a high-energy scintillator, and the scintillator not covered by the inverted U-shaped groove is a low-energy scintillation.

[0030] Preferably, it further includes:

[0031] A detection plate, which includes an array of scintillators and a photodiode plate;

[0032] A substrate, which is used to install and fix the anti-scattering grid assembly and the detection plate. Multiple bosses are provided on the upper surface of the substrate as the installation surfaces for the anti-scattering grid assembly and the detection plate. The lower surface is flat and provided with multiple connection holes;

[0033] A radiator, which is installed at the bottom of the substrate;

[0034] A bracket, which is installed on the bottom surface of the substrate, with flanges on both sides, and multiple round holes are opened on the longitudinal flanges.

[0035] The above at least one technical solution adopted in the embodiments of the present invention can achieve the following beneficial effects:

[0036] Through innovative structural design, the anti-scattering grid component of the present invention ingeniously solves the above technical problems. It not only achieves efficient scattered ray absorption and separation of high- and low-energy rays, but also greatly simplifies the structural design, improves the processing accuracy and assembly efficiency. In particular, the integrally formed mesh grid design of the present invention, combined with the special inverted U-shaped groove structure, not only improves the overall strength, but also provides an accurate installation space for the filter, effectively solving the positioning error problem in the prior art.

[0037] In addition, the design of the present invention also has significant synergistic effects. For example, the special cross-sectional design of the anti-scattering grid not only provides an installation surface for the filter, but also effectively separates adjacent scintillators and absorbs scattered rays. The design of the upper and lower cover plates not only prevents dust from entering, but also further enhances the overall strength. This multi-functional structural design greatly improves the overall performance and reliability of the system.

[0038] Generally speaking, while realizing dual-energy CT imaging, the anti-scattering grid component of the present invention significantly improves the imaging quality, reduces the production cost and maintenance difficulty. This comprehensive technological breakthrough provides new possibilities for the performance improvement and clinical application expansion of CT systems, and has important practical value and broad market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0040] Figure 1 is a perspective view of the anti-scattering grid component of the present invention;

[0041] Figure 2 is an exploded view of the anti-scattering grid component of the present invention;

[0042] Figure 3 is a cross-sectional view of the anti-scattering grid component of the present invention;

[0043] Figure 4 is a perspective view of the anti-scattering grid of the present invention;

[0044] Figure 5 is a side view of the anti-scattering grid of the present invention;

[0045] Figure 6 is a top view of the anti-scattering grid of the present invention;

[0046] Figure 7 is a cross-sectional view of the anti-scattering grid of the present invention;

[0047] Figure 8 is an enlarged cross-sectional view of the anti-scattering grid of the present invention;

[0048] Figure 9 Longitudinal sectional view of the anti-scattering grid of the present invention;

[0049] Figure 10 Cross-sectional view of the transverse grid sheet of the present invention;

[0050] Figure 11 Enlarged cross-sectional view of the transverse grid sheet of the present invention;

[0051] Figure 12 Transverse sectional view of the anti-scattering grid of the present invention;

[0052] Figure 13 Cross-sectional view of the longitudinal grid sheet of the anti-scattering grid of the present invention;

[0053] Figure 14 Enlarged cross-sectional view of the longitudinal grid sheet of the anti-scattering grid of the present invention;

[0054] Figure 15 Planar projection shape diagram of the longitudinal grid sheet of the present invention;

[0055] Figure 16 Planar projection shape diagram of the concave-shaped longitudinal grid sheet of the present invention;

[0056] Figure 17 Comparison diagram of the inverted U-shaped notch and the concave-shaped notch of the present invention;

[0057] Figure 18 Corresponding relationship diagram between the grid and the scintillator and its sectional view;

[0058] Figure 19 Sectional view of the grid and the scintillator;

[0059] Figure 20 Stereogram of the module of the present invention;

[0060] Figure 21 Side view of the module of the present invention;

[0061] Figure 22 Stereogram of the bracket of the present invention;

[0062] Figure 23 Schematic structural diagram of the CT system of the present invention. Detailed implementation manner

[0063] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and the corresponding drawings. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0064] The present invention provides a scatter grid assembly capable of dual-energy acquisition. This assembly is mainly applied in a CT system to achieve dual-energy imaging and reduce the influence of scattered rays, thereby improving the imaging quality. The following will describe the present invention in detail in conjunction with specific embodiments.

[0065] As Figures 1-23 shown, the scatter grid assembly 5 of the present invention includes a scatter grid 1, a filter 2, an upper cover plate 3, and a lower cover plate 4. These components work together to jointly achieve efficient scattered ray absorption and high- and low-energy ray separation.

[0066] The scatter grid 1 is the core component of the present invention. Preferably, the scatter grid 1 is an integrally formed mesh grid, including a transverse grid sheet 11 and a longitudinal grid sheet 12 that cross each other. This integrally formed design not only improves the overall structural strength but also facilitates processing and manufacturing, which is beneficial to improving product accuracy. In an embodiment of the present invention, both the transverse grid sheet 11 and the longitudinal grid sheet 12 are in a focused tilt. This focused tilt design fully considers the conical divergence characteristics of X-rays and can significantly improve the imaging quality.

[0067] It should be noted that inverted U-shaped grooves 13 are distributed at intervals along the longitudinal direction at the bottom of the scatter grid 1. These inverted U-shaped grooves 13 play a key role in the present invention. They provide an installation space for the filter 2 and are an important structure for achieving high- and low-energy ray separation.

[0068] The filter 2 is another important component of the present invention. The present invention uses a strip-shaped filter 2, which is cleverly embedded and fixed in the inverted U-shaped grooves 13 at the bottom of the scatter grid 1. This design not only simplifies the structure but also improves the positioning accuracy of the filter 2 and reduces the cumulative error. In practical applications, the filter 2 is usually made of materials such as copper or aluminum and can effectively filter out low-energy rays.

[0069] To further improve the overall performance of the scatter grid assembly, the present invention also designs an upper cover plate 3 and a lower cover plate 4. The upper cover plate 3 covers and is fixed to the top of the scatter grid 1, while the lower cover plate 4 covers and is fixed to the bottom of the scatter grid 1. This design not only prevents dust from entering and affecting imaging but also further improves the strength of the scatter grid assembly.

[0070] Refer toFigures 18-19 Among them, the bottom grid of the anti-scatter grid 1 corresponds to the scintillators on the detection plate 6 one by one, and the inverted U-shaped groove 13 longitudinally and intermittently covers part of the scintillators.

[0071] The scintillators on the detection plate 6 covered by the inverted U-shaped groove 13 are high-energy scintillators 61, and the scintillators not covered by the inverted U-shaped groove are low-energy scintillators 62.

[0072] Furthermore, the present invention optimizes the cross-sectional structure of the transverse grid sheet 11. As Figure 11 shown, the cross-section of the transverse grid sheet 11 includes a top part 111, a middle part 112, and a root part 113. Among them, the top part 111 has a relatively thin thickness and a relatively long length. The top part 111 is relatively long in order to absorb most of the scattered rays as much as possible. Since the upper part is relatively long, if the grid holes are small, high precision requirements are imposed on the assembly and manufacturing accuracy of the radiation source and the detector. Therefore, the thickness of the upper part is reduced and the grid holes are enlarged to reduce the precision requirements. Because the grid holes are thin and long slits, the radiation source and the detector need to be very accurately angled so that the incident rays can hit the scintillators in each grid. Otherwise, if the angle or position is deviated a little bit, the actual light-receiving area of each small scintillator will be small;

[0073] The middle part 112 increases the wall thickness and the grid holes become smaller. When the rays pass through the middle grid, only the rays required by a single scintillator are retained, and the stray rays at non-incident angles are further filtered; the middle part 112 becomes thicker to improve the grid strength and provide an installation and positioning surface for the filter sheet; although the grid holes in the middle part 112 are small, they are short, and the requirements for the installation and positioning accuracy of the CT system are relatively low, which can ensure that the existing processing level can meet the requirements.

[0074] Simply put, for the scintillator, what it needs is the direct rays that reach it directly from the light source of the radiation source. However, there are rays at other angles that can reach the scintillator, which will cause incorrect data in the CT image and form image artifacts. We call this kind of rays scattered rays, which are different from the direct rays. The purpose of the grid is to absorb the scattered rays. The thickness of the middle part 112 is greater than that of the top part 111 and the length is less than that of the top part 111, which increases the structural strength. In particular, one side of the root part 113 is concave to form an inverted L-shaped structure 114. The inverted L-shaped structures 114 of two adjacent transverse grid sheets 11 face each other and jointly form the aforementioned inverted U-shaped groove 13. This special cross-sectional design not only provides a positioning and installation surface for the filter sheet 2, but also can effectively separate the incident rays between adjacent scintillators and absorb the scattered rays in adjacent grid holes.

[0075] In another embodiment of the present invention, as Figure 13As shown, the cross-section of the longitudinal grid sheet 12 has also been carefully designed. The cross-section of the longitudinal grid sheet 12 also includes a top part 121 and a root part 122. The top part 121 has a thinner thickness and a longer length, while the root part 122 has a thickness greater than that of the top part 121 and a length shorter than that of the top part 121. This design ensures the structural strength while, in order to absorb most of the scattered rays as much as possible, the principle is the same as that of the transverse grid sheet 11. It is worth mentioning that the sizes of the root part 122 of any cross-section of a single longitudinal grid sheet 12 are not the same. The root part at the inverted U-shaped groove 13 is shorter, while the root part at the non-inverted U-shaped groove is longer. This varying root design not only ensures the installation space of the filter sheet 2 but also maximizes the absorption effect of scattered rays.

[0076] Through the above design, the anti-scatter grid assembly of the present invention realizes dual-energy CT imaging while effectively solving the problem of the influence of scattered rays. This assembly not only improves the imaging quality but also reduces the production cost and maintenance difficulty to a certain extent. Such a comprehensive technological breakthrough makes the present invention have high practical value and industrialization potential. In a preferred embodiment of the present invention, the planar projection shape of the longitudinal grid sheet 12 is a rectangular sheet, and inverted U-shaped grooves 13 are distributed at intervals at the bottom. This design not only simplifies the processing technology but also ensures the overall structural strength of the anti-scatter grid 1. It is worth noting that the rectangular sheet design enables the longitudinal grid sheets 12 to be evenly distributed, effectively absorbing scattered rays in all directions.

[0077] The present invention further optimizes the structural design of the anti-scatter grid 1. As Figure 2 shown, two bosses 14 extend from the bottom of the outermost longitudinal grid sheet 12 of the anti-scatter grid 1. Two parallel rib plates 15 are ingeniously arranged on each boss 14. These rib plates 15 connect the boss 14 and the outer wall of the grid, significantly enhancing the stability of the overall structure. In particular, positioning holes and connection holes are provided on both sides of the boss 14. The positioning holes are used to accurately position the anti-scatter grid assembly in the CT system, while the connection holes facilitate the connection and fixation with other components. This design greatly improves the installation accuracy and usability of the anti-scatter grid assembly.

[0078] In order to further improve the processing accuracy and usage effect of the anti-scatter grid 1, the present invention makes an innovation in the design of the inverted U-shaped groove 13. The inverted U-shaped groove 13 also includes a small inverted U-shaped groove cut upward along the side wall of the groove at the top corner of the groove. Preferably, the height of the small inverted U-shaped groove 18 is 0.2 - 0.4 mm, and the width is 0.4 - 0.6 mm. This design ingeniously solves the possible inner corner problem during the processing, ensuring that the filter sheet 2 can be completely attached to the top surface of the groove, thereby improving the installation accuracy and stability of the filter sheet 2.

[0079] In another embodiment of the present invention, the length, width, and height of the filter plate 2 precisely match the dimensions of the bottom groove of the anti-scatter grid 1. Preferably, the filter plate 2 is adhesively fixed to the top surface and side walls of the inverted U-shaped groove 13. This design not only ensures the installation stability of the filter plate 2 but also improves the efficiency of high- and low-energy ray separation. In practical applications, the material of the filter plate 2 can be selected according to specific requirements, and common materials include copper, aluminum, etc. These materials can effectively filter out low-energy rays while ensuring sufficient penetration of high-energy rays.

[0080] The upper cover plate 3 and the lower cover plate 4 of the present invention both adopt a rectangular sheet design to completely cover all the grid holes of the anti-scatter grid 1. This design can not only effectively prevent dust from entering the grid holes but also further enhance the overall strength of the anti-scatter grid assembly. In practical applications, the upper cover plate 3 and the lower cover plate 4 can be made of lightweight and high-strength materials, such as carbon fiber composite materials, to reduce the absorption of X-rays.

[0081] To achieve the best scattered ray absorption effect, the present invention preferably uses high-density materials to make the anti-scatter grid 1. Common high-density materials include tungsten, molybdenum, etc. These materials have excellent X-ray absorption capabilities and can effectively reduce the impact of scattered rays on the imaging quality. At the same time, in addition, the structural design of the anti-scatter grid 1 also has an important impact on its strength and service life. For example, by increasing the thickness of the grid bottom, adopting a ribbed plate design, setting convex platforms at both ends, and bonding the upper and lower cover plates, etc., the structural strength of the anti-scatter grid 1 can be effectively improved, thereby extending its service life.

[0082] Through the above design, the anti-scatter grid assembly of the present invention not only achieves efficient scattered ray absorption and high- and low-energy ray separation but also has the advantages of stable structure, convenient installation, and simple maintenance. This comprehensive technological breakthrough makes the present invention have broad application prospects in the field of medical imaging equipment such as CT systems. Please refer to Figure 18 In a preferred embodiment of the present invention, the anti-scatter grid assembly further includes a detection plate 6, a substrate 20, a radiator 21, and a bracket 22. These components work together with the aforementioned anti-scatter grid 1, filter plate 2, etc. to jointly form a complete detector module, further improving the performance and reliability of the overall system.

[0083] The detection plate 6 is a key component in the present invention responsible for receiving X-rays and converting them into electrical signals. As Figure 7As shown, the detection panel 6 includes scintillators 63 and a photodiode panel 64 distributed in an array. The scintillators 63 are responsible for converting the incident X-rays into visible light, while the photodiode panel 64 converts this visible light into electrical signals. Preferably, the scintillators 63 can be made of materials such as cesium iodide (CsI) or gadolinium oxysulfide (GOS), which have excellent X-ray conversion efficiency and spatial resolution. The photodiode panel 64 is typically fabricated using amorphous silicon (a-Si) or complementary metal oxide semiconductor (CMOS) technology to achieve efficient photoelectric conversion.

[0084] The substrate 20 plays a crucial supporting and connecting role in the present invention. As Figure 18 shown, the substrate 20 is used to mount and fix the anti-scatter grid assembly and the detection panel 6. In particular, there are multiple protrusions on the upper surface of the substrate 20, which ingeniously serve as the mounting surfaces for the anti-scatter grid assembly and the detection panel 6. This design not only improves the mounting accuracy but also facilitates the alignment between components. The lower surface of the substrate 20 is flat and has multiple connection holes. These connection holes facilitate the installation of the radiator 21 and the bracket 22, and also provide an interface for connecting the entire module to other parts of the CT system.

[0085] To effectively solve the heat problem generated during the operation of the detector, the present invention designs the radiator 21. The radiator 21 is installed at the bottom of the substrate 20. Preferably, the radiator 21 can be made of high thermal conductivity materials such as aluminum or copper and is designed with multiple heat dissipation fins. This design greatly increases the heat dissipation area and effectively improves the heat dissipation efficiency. In some embodiments, the radiator 21 can also integrate a liquid cooling system to further enhance the heat dissipation capacity and ensure the stable performance of the detector during long-term operation.

[0086] The bracket 22 is another important structural component in the present invention. The bracket 22 is installed on the bottom surface of the substrate 20 and has flips on both sides. This design significantly enhances the structural strength of the entire module. In particular, there are multiple round holes opened on the longitudinal flanges. These round holes not only reduce the weight of the bracket 22 but also provide grasping points for fingers or tools, greatly facilitating the installation and maintenance operations of the module. Preferably, the height of the bracket 22 is the same as that of the radiator 21, and such a design enables the entire module to remain stable when placed and not prone to tipping over.

[0087] In the practical application of the present invention, multiple groups of the above detector modules can be installed on the detector bracket of a CT system. When the X-ray source emits a conical beam, the rays first pass through the anti-scatter grid 1, and at this time, most of the scattered rays are absorbed. Subsequently, the rays pass through the filter 2, and the low-energy rays are filtered out. Finally, the remaining high-energy rays are received by the scintillator corresponding to the inverted U-shaped groove 13 to generate high-energy data. The scintillator corresponding to the adjacent grid of the inverted U-shaped groove 13 receives the low-energy rays to generate low-energy data. This design ingeniously realizes dual-energy CT imaging, significantly improving the image quality and diagnostic accuracy.

[0088] Through the above design, the anti-scatter grid assembly of the present invention not only realizes efficient scattered ray absorption and separation of high- and low-energy rays, but also solves problems in practical applications such as thermal management and installation convenience. Such a comprehensive technological breakthrough makes the present invention have significant technological advantages and broad application prospects in the field of medical imaging equipment such as CT systems.

[0089] The above are only the embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. An anti-scattering grid component capable of realizing dual-energy collection, characterized in that: include: An anti-scattering grid, the anti-scattering grid is an integrally formed mesh grid, comprising a cross-formed transverse grid sheet and a longitudinal grid sheet, the transverse grid sheet and the longitudinal grid sheet are both inclined in a focusing manner, and the bottom of the anti-scattering grid is provided with inverted U-shaped grooves spaced apart in the longitudinal direction; A filter, which is in the shape of a long strip and is embedded and fixed in the inverted U-shaped groove at the bottom of the anti-scattering grid; An upper cover plate, the upper cover plate covers and is fixed on the top of the anti-scattering grid; A lower cover plate, the lower cover plate covers and is fixed to the bottom of the anti-scatter grid; Wherein, the bottom grid of the anti-scattering grid corresponds one to one with the scintillator on the detection plate, and the inverted U-shaped grooves cover part of the scintillator at intervals in the longitudinal direction; The cross section of the transverse grid sheet includes: A top portion 1, wherein the top portion 1 is thinner and longer; a middle portion, wherein the thickness of the middle portion is greater than that of the top portion 1 and the length of the middle portion is less than that of the top portion 1; The root portion 1 has a side surface that is concave inwardly formed into an inverted L-shaped structure, and the inverted L-shaped structures of two adjacent transverse grid pieces are opposite to each other to form the inverted U-shaped groove.

2. The anti-scatter grid assembly according to claim 1, characterized in that: The cross section of the longitudinal grid sheet comprises: A second top portion, wherein the second top portion is thinner and longer; A second root portion, wherein the second root portion has a thickness greater than that of the second top portion and a length less than that of the second top portion; Among them, the root two sizes of any cross section of a single longitudinal grid piece are different, the root two of the cross section located at the inverted U-shaped groove is shorter, and the root two located at the non-inverted U-shaped groove is longer.

3. The anti-scatter grid assembly according to claim 1, characterized in that: The plane projection shape of the longitudinal grid sheet is a rectangular sheet, and the inverted U-shaped grooves are distributed at intervals at the bottom.

4. The anti-scatter grid assembly according to claim 1, characterized in that: Two bosses extend from the bottom of the outermost longitudinal grid piece of the anti-scatter grid, each of which is provided with two parallel ribs, the ribs connecting the boss and the grid outer wall, and the bosses on both sides are provided with positioning holes and connecting holes.

5. The anti-scatter grid assembly according to claim 1, characterized in that: The inverted U-shaped groove also includes: A small inverted U-shaped groove is located at the top corner of the groove and cut upward along the side wall of the groove. The height of the small inverted U-shaped groove is 0.2-0.4mm and the width is 0.4-0.6mm.

6. The anti-scatter grid assembly according to claim 1, characterized in that: The length, width and height of the filter are consistent with the size of the bottom groove of the anti-scattering grid, and the filter is glued and fixed to the top surface and side wall of the inverted U-shaped groove.

7. The anti-scatter grid assembly according to claim 1, characterized in that: The upper cover plate and the lower cover plate are both in the shape of rectangular sheets, covering all grid holes of the anti-scattering grid.

8. The anti-scatter grid assembly according to claim 1, characterized in that: The anti-scattering grid is made of high-density material. The scintillator on the detection plate covered by the inverted U-shaped groove is a high-energy scintillator, and the scintillator not covered by the inverted U-shaped groove is a low-energy scintillator.

9. The anti-scatter grid assembly according to any one of claims 1 to 8, characterized in that: Also includes: A detection board, the detection board comprising a scintillator and a photodiode board distributed in an array; A substrate, the substrate is used to install and fix the anti-scatter grid assembly and the detection plate, the upper surface of the substrate is provided with a plurality of bosses as the installation surface of the anti-scatter grid assembly and the detection plate, and the lower surface is a plane and is provided with a plurality of connection holes; A heat sink, the heat sink is mounted on the bottom of the substrate; The bracket is installed on the bottom surface of the base plate, with flanges on both sides and a plurality of circular holes opened on the flanges along the longitudinal direction.

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