Grid plate assembly and CT scanning system
Through the combined structure of the first plate body and the second plate body, the method of splicing the gate holes in the hollow area is used to solve the problem of difficult and high cost of processing of the gate plate structure, and high precision and low cost of grid assembly manufacturing is realized, meeting the high resolution requirements of the CT scanning system.
Patent Information
- Application Number
- CN202510525472.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2025-07-11
AI Technical Summary
In the prior art, the processing of the hole structure of the gate plate structure is difficult, the yield is low, the production cost is high, and it is difficult to meet the needs of reducing the pixel size of the detector chip and expanding the imaging range.
Using a combined structure of the first plate body and the second plate body, by opening a hollow area on the first plate body and splicing it with the second plate body to form a gate hole instead of directly opening a hole in the gate plate, the processing difficulty is reduced and the manufacturing accuracy is improved.
It realizes high-precision processing of gate holes, shortens production cycles, reduces costs, and improves yield, meeting the high-resolution requirements of CT scanning systems.
Smart Images
Figure CN120284307A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical imaging technology, for example, to a grid assembly and a CT scanning system. Background Art
[0002] In a CT system 1, an X-ray source emits X-rays, and then a detector 4 detects the rays emitted by the ray source 2 to generate an image. As shown in Figure 1 To enhance the resolution of the image generated by the CT system 1, a lower slice device is installed above the detector 4 at a relatively close distance. The lower slice device includes a grid structure 3, and a square hole or other shaped hole structure 31 is provided on the grid structure 3. The cross-sectional dimension of the hole structure 31 is smaller than the size of the chip pixel 41 of the detector 4, as shown in Figure 2 and Figure 3 When the CT system 1 operates, the X-rays emitted by the ray source 2 pass through the hole structure 31 on the grid structure 3 and are projected onto the chip of the detector 4, corresponding to the chip pixels 41 one by one, thereby further reducing the pixel size and improving the image resolution.
[0003] In related technologies, the grid is made of a tungsten alloy plate with a thickness of about 1 mm, and the tungsten alloy plate is cut by a slow wire electrical discharge machining process to form a plurality of hole structures. When cutting a square hole, the minimum width of the cut square hole that can be achieved is 0.2 mm.
[0004] As the size of the chip pixels of the detector decreases, to further improve the resolution, the size and pitch of the hole structures on the grid structure also need to be reduced accordingly. Moreover, to increase the imaging range of the lower slice device, the range of the hole structures distributed on the grid structure also needs to be increased, resulting in a multiple increase in the number of holes.
[0005] However, due to the high hardness and thickness of the grid material, it is very difficult to cut a hole structure with a size less than 0.2 mm by conventional processes such as wire cutting, which significantly increases the processing difficulty of the grid structure, making it difficult to ensure the size, shape, and position accuracy of the cut hole structures. Therefore, problems such as low yield rate of the grid structure, long production cycle, and increased production cost occur. Summary of the Invention
[0006] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments, but rather serves as a preface to the subsequent detailed description.
[0007] Embodiments of the present disclosure provide a grid assembly and a CT scanning system to reduce the processing difficulty and production cost of the hole structure and improve the yield rate of the grid assembly.
[0008] In some embodiments, a grid plate assembly is provided, including: a first plate body provided with a hollowed-out area; a second plate body disposed within the hollowed-out area and defining a plurality of grid holes together with the first plate body.
[0009] Optionally, the hollowed-out area includes a first area for accommodating the second plate body and a plurality of second areas communicating with the first area, and the plurality of second areas constitute the plurality of grid holes.
[0010] Optionally, the hollowed-out area includes a first area for accommodating the second plate body and a plurality of second areas communicating with the first area, and a plurality of groove bodies penetrating in the thickness direction of the second plate body are provided on the side wall of the second plate body; wherein, the plurality of groove bodies correspond to the plurality of second areas one by one, and the area defined by each groove body and the corresponding second area constitute a grid hole.
[0011] Optionally, a plurality of groove bodies penetrating in the thickness direction of the second plate body are provided on the side wall of the second plate body, and the areas defined by the plurality of groove bodies constitute the plurality of grid holes.
[0012] Optionally, there are a plurality of hollowed-out areas, the second plate body corresponds to the hollowed-out areas one by one, and the plurality of hollowed-out areas are distributed in multiple rows and multiple columns.
[0013] Optionally, the hollowed-out areas are strip-shaped, and the lengths of the plurality of hollowed-out areas in the same row or the same column are the same or include at least two lengths.
[0014] Optionally, the first plate body is a multi-layer structure stacked in the thickness direction of the first plate body, and / or the second plate body is a multi-layer structure stacked in the thickness direction of the second plate body.
[0015] Optionally, the second plate body and the first plate body are fixed by optical glue or welding; or a step structure is provided on the first plate body or the second plate body, and through the step structure, the second plate body is lapped on the first plate body.
[0016] Optionally, the grid holes are square holes, and the side length of the grid holes is less than 0.2 mm, or the grid holes are circular holes, and the aperture of the grid holes is less than 0.2 mm.
[0017] Optionally, the grid plate assembly further includes: a cover plate, which is stacked on at least one side of the first plate body and is used to limit the second plate body.
[0018] In some embodiments, a CT scanning system is provided, including: a radiation source and a detector; and the grid plate assembly as described in any of the above embodiments, and the grid plate assembly is located between the radiation source and the detector.
[0019] The grid plate assembly for a CT scanning system and the CT scanning system provided by the embodiments of the present disclosure can achieve the following technical effects:
[0020] The grid plate assembly provided by the embodiments of the present disclosure includes a first plate body and a second plate body. The first plate body is provided with a hollowed-out area, the second plate body is embedded in the hollowed-out area, and the first plate body and the second plate body are spliced to define a plurality of grid holes.
[0021] When using the grid plate assembly provided by the present disclosure in the processing and manufacturing process, it is only necessary to open a hollowed-out area on the first plate body, and a plurality of grid holes are defined by splicing the first plate body and the second plate body. In this way, by using the existing cutting process, a hollowed-out area is cut out on the first plate body, and then a plurality of grid holes are defined by splicing the first plate body and the second plate body, so as to realize the processing and manufacturing of the required micro-holes. Compared with the related art, directly opening holes on the grid plate reduces the difficulty of processing and manufacturing, and can greatly improve the manufacturing accuracy, shorten the production and manufacturing cycle, and reduce the production cost.
[0022] The above general description and the following description are only exemplary and explanatory, and are not used to limit this application. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and among them:
[0024] Figure 1 is a schematic layout diagram of a radiation source, a grid plate structure, and a detector in a CT system provided by the related art;
[0025] Figure 2 is Figure 1 a schematic distribution diagram of the hole structure of the grid plate structure shown;
[0026] Figure 3 is Figure 1 a schematic diagram of the chip pixels of the detector shown;
[0027] Figure 4 is a schematic structural diagram of a grid plate assembly provided by an embodiment of the present disclosure;
[0028] Figure 5 is a schematic assembly diagram of a first plate body and a second plate body provided by an embodiment of the present disclosure;
[0029] Figure 6 is Figure 5 a schematic structural diagram of the second plate body installed in the hollowed-out area in the shown embodiment;
[0030] Figure 7 is a schematic assembly diagram of a first plate body and a second plate body provided by another embodiment of the present disclosure;
[0031] Figure 8 isFigure 7 Schematic diagram of the structure of the second plate body installed in the hollow area in the illustrated embodiment;
[0032] Figure 9 Schematic diagram of the assembly of the first plate body and the second plate body provided by another embodiment of the present disclosure;
[0033] Figure 10 is Figure 9 Schematic diagram of the structure of the second plate body installed in the hollow area in the illustrated embodiment;
[0034] Figure 11 Schematic diagram of the assembly of the first plate body and the second plate body provided by another embodiment of the present disclosure;
[0035] Figure 12 Schematic diagram of the distribution of multiple hollow areas of the first plate body provided by another embodiment of the present disclosure;
[0036] Figure 13 Schematic diagram of the assembly of the first plate body and the second plate body provided by another embodiment of the present disclosure.
[0037] Reference numerals:
[0038] 1 CT system; 2 radiation source; 3 grid plate structure; 31 hole structure; 4 detector; 41 chip pixel;
[0039] 100 grid plate assembly; 102 grid holes;
[0040] 110 first plate body; 112 hollow area; 113 first area; 114 second area;
[0041] 120 second plate body; 122 groove body;
[0042] 130 cover plate. Detailed implementation manners
[0043] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the attached drawings. The attached drawings are only for reference and explanation purposes, and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a sufficient understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner to simplify the drawings.
[0044] In the description and claims of the embodiments of the present disclosure and the above-mentioned drawings, terms such as "first" and "second" are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so as to implement the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion.
[0045] In the embodiments of the present disclosure, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "middle", "outer", "front", and "rear" is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their embodiments, and are not used to limit that the indicated devices, elements, or components must have a specific orientation, or be constructed and operated in a specific orientation. And, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.
[0046] In addition, the terms "arranged", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.
[0047] Unless otherwise specified, the term "plurality" means two or more.
[0048] In the embodiments of the present disclosure, the character " / " means that the front and rear objects are in an "or" relationship. For example, A / B means: A or B.
[0049] The term "and / or" is an associative relationship describing an object, indicating that there can be three relationships. For example, A and / or B means: A or B, or, the three relationships of A and B.
[0050] It should be noted that, without conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.
[0051] In some embodiments, in combination with Figures 4 to 13As shown, a grid plate assembly 100 is provided, including: a first plate body 110 and a second plate body 120, the first plate body 110 is provided with a hollowed-out area 112; a second plate body 120, disposed within the hollowed-out area 112, and defining a plurality of grid holes 102 with the first plate body 110.
[0052] The grid plate assembly 100 provided by the embodiments of the present disclosure includes a first plate body 110 and a second plate body 120. The first plate body 110 is provided with a hollowed-out area 112, the second plate body 120 is embedded within the hollowed-out area 112, and the first plate body 110 and the second plate body 120 are spliced to define a plurality of grid holes 102.
[0053] When using the grid plate assembly 100 provided by the present disclosure in the processing and manufacturing process, it is only necessary to open a hollowed-out area 112 on the first plate body 110, and define a plurality of grid holes 102 by splicing the first plate body 110 and the second plate body 120. In this way, using the existing cutting process, cut out the hollowed-out area 112 on the first plate body 110, and then define a plurality of grid holes 102 by splicing the first plate body 110 and the second plate body 120 to realize the processing and manufacturing of the required micro-holes. Compared with the related art, directly opening holes on the grid plate reduces the processing and manufacturing difficulty, and can greatly improve the manufacturing accuracy, shorten the production and manufacturing cycle, and reduce the production cost.
[0054] In some embodiments, in combination with Figure 9 and Figure 10 as shown, the hollowed-out area 112 includes a first area 113 for accommodating the second plate body 120 and a plurality of second areas 114 communicating with the first area 113, and the plurality of second areas 114 constitute a plurality of grid holes 102.
[0055] In this embodiment, the second plate body 120 is placed in the first area 113. The side wall of the second plate body 120 is not grooved. The side wall of the second plate body 120 and the side walls of the second areas 114 on both sides of the second plate body 120 enclose a plurality of grid holes 102.
[0056] In this way, the X-rays emitted by the ray source pass through the plurality of grid holes 102 and are projected onto the chip, corresponding to the pixels on the chip one by one, thereby realizing further reduction of the pixel size and improving the image resolution. Due to the hardness and thickness of the material of the first plate body 110, it is difficult to directly open holes that meet the pixel requirements. However, the present disclosure reduces the processing difficulty by opening a hollowed-out area 112 and cutting out the second area on the side wall of the hollowed-out area 112, and defines a plurality of grid holes 102 by splicing the first plate body 110 and the second plate body 120, instead of directly drilling holes on the grid plate, thereby reducing the manufacturing difficulty and processing cost.
[0057] Optionally, in combination with Figure 9As shown, the first region 113 can be the region defined by the through-hole structure formed in the first plate body 110, and the second region 114 can be the region defined by the groove structure formed in the side wall of the through-hole structure.
[0058] In some embodiments, with reference to Figure 7 and Figure 8 As shown, the hollowed-out region 112 includes a first region 113 for accommodating the second plate body 120 and a plurality of second regions 114 communicating with the first region 113. A plurality of grooves 122 penetrating in the thickness direction of the second plate body 120 are provided on the side wall of the second plate body 120; wherein, the plurality of grooves 122 correspond to the plurality of second regions one by one, and the region defined by each groove and the corresponding second region form a grid hole 102.
[0059] In this embodiment, the second plate body 120 is placed inside the first region 113 of the hollowed-out region 112 of the first plate body 110. The second regions 114 of the hollowed-out region 112 correspond to the plurality of grooves 122 on the side wall of the second plate body 120 one by one, and the region defined by each groove 122 and the corresponding second region form a grid hole 102. In this way, the X-rays emitted by the radiation source pass through the plurality of grid holes 102 and are projected onto the chip, corresponding to the pixels on the chip one by one, thereby further reducing the pixel size and improving the image resolution. By splicing the first plate body 110 and the second plate body 120 to form a plurality of grid holes 102, instead of directly drilling holes in the grid plate, the manufacturing difficulty and processing cost are reduced, and the processing precision and yield are improved.
[0060] In some embodiments, with reference to Figure 5 and Figure 6 As shown, a plurality of grooves 122 penetrating in the thickness direction of the second plate body 120 are provided on the side wall of the second plate body 120, and the regions defined by the plurality of grooves 122 form a plurality of grid holes 102.
[0061] In this embodiment, along the extending direction of the second plate body 120, a plurality of grooves 122 penetrating the thickness direction are sequentially formed in the side wall of the second plate body 120. The side wall of the hollowed-out region 112 of the first plate body 110 is not grooved. The second plate body 120 is placed inside the first region 113 of the hollowed-out region 112 of the first plate body 110, and the plurality of grooves 122 on the side wall of the second plate body 120 and the side wall of the hollowed-out region 112 enclose a plurality of grid holes 102. In this way, the X-rays emitted by the radiation source pass through the plurality of grid holes 102 and are projected onto the chip, corresponding to the pixels on the chip one by one, thereby further reducing the pixel size and improving the image resolution. By splicing the first plate body 110 and the second plate body 120 to form a plurality of grid holes 102, instead of directly drilling holes in the grid plate, the manufacturing difficulty and processing cost are reduced.
[0062] Optionally, with reference to Figure 6 、Figure 8 and Figure 10 As shown in Figure 10 , the size of the grid hole 102 obtained by splicing the first plate body 110 and the second plate body 120 is smaller than the size of the pixels of the chip of the detector. In this way, during the operation of the CT scanning system, the X-ray passes through the multiple grid holes 102 and projects onto the chip, corresponding to the pixels on the chip one by one, thereby realizing further reduction of the pixel size and improving the image resolution.
[0063] Optionally, the cross-sectional size of the grid hole 102 obtained by splicing the first plate body 110 and the second plate body 120 can be made less than 0.2 mm, which can meet the requirement for high resolution of the generated image of the CT scanning system.
[0064] In some embodiments, the second region 114 is the region defined by the groove structure, and the shape of the groove structure includes a rectangle or a semicircle; and / or, the shape of the groove 122 includes a rectangle or a semicircle; and / or, the second region 114 and the groove 122 have the same shape.
[0065] When the second region 114 and the groove 122 enclose the grid hole 102, the shapes of the second region 114 and the groove 122 are set to be the same to enclose a regular-shaped grid hole 102.
[0066] In some embodiments, the grid hole 102 is a square hole, and the side length of the grid hole 102 is less than or equal to 0.2 mm, or the grid hole is a circular hole, and the aperture of the grid hole is less than or equal to 0.2 mm.
[0067] In some embodiments, there are multiple hollow areas 112, and the second plate body 120 corresponds to the hollow areas 112 one by one, and the multiple hollow areas 112 are distributed in multiple rows and columns.
[0068] In this embodiment, by setting multiple hollow areas 112, compared with a single long hollow area 112, the method of using multiple segmented hollow areas 112 can effectively reduce the processing deformation and improve the stiffness of the first plate body 110 and the second plate body 120. Moreover, it can reduce the risk of component deformation and fracture during the assembly process.
[0069] Optionally, as shown in Figure 5 multiple hollow areas 112 are sequentially arranged along the X direction of the first plate body 110.
[0070] In this embodiment, multiple hollow areas 112 are sequentially opened along the X direction of the first plate body 110, and the multiple hollow areas 112 extend along the Z direction so that the multiple hollow areas 112 are arranged along the X direction. Among them, in one example, the X direction is the length direction of the first plate body 110, and the Z direction is the width direction of the first plate body 110.
[0071] Optionally, as shown inFigure 11 and Figure 12 As shown in Figure 12 , a plurality of hollow areas 112 are arranged along the X direction and the Z direction of the first plate body 110. Among them, the X direction and the Z direction are two perpendicular directions.
[0072] In this embodiment, a plurality of hollow areas 112 are distributed in multiple rows along the X direction of the first plate body 110, and are distributed in multiple columns along the Z direction of the first plate body 110. The hollow areas 112 extend along the Z direction, that is, the plurality of hollow areas 112 are distributed in a row×column manner. In this way, by arranging the plurality of hollow areas 112 along the X direction and the Z direction, the imaging range of the CT scanning system is increased.
[0073] In some examples, the X direction is the length direction of the first plate body 110, and the Z direction is the width direction of the first plate body 110. Among them, by arranging a plurality of hollow areas 112 along the Z direction, compared with a single long hollow area 112, the method of using a plurality of segmented hollow areas 112 can effectively reduce processing deformation and improve the stiffness of the first plate body 110 and the second plate body 120. And it can reduce the risk of component deformation and fracture during the assembly process.
[0074] In some embodiments, the hollow area 112 is strip-shaped, and the lengths of the plurality of hollow areas 112 in the same row or the same column are the same or include at least two lengths.
[0075] Optionally, in combination with Figure 5 and Figure 11 As shown in Figure 11 , the lengths of the plurality of hollow areas 112 distributed along the X direction are the same.
[0076] In this embodiment, a plurality of hollow areas 112 are sequentially opened along the X direction of the first plate body 110. The plurality of hollow areas 112 extend along the Z direction, and the lengths of the plurality of hollow areas 112 along the Z direction are the same, so as to increase the effective projection area.
[0077] Optionally, in combination with Figure 11 As shown in Figure 11 , the lengths of the plurality of hollow areas 112 distributed along the X direction of the first plate body 110 are the same, and the lengths of the plurality of hollow areas 112 distributed along the Z direction of the first plate body 110 are the same.
[0078] In this embodiment, a plurality of hollow areas 112 are distributed in multiple rows along the X direction and in multiple columns along the Z direction. Among them, the hollow areas 112 extend along the Z direction. By setting the lengths of the hollow areas 112 to be the same, that is, the lengths of the plurality of hollow areas 112 distributed on the first plate body 110 are all the same, the imaging range of the CT scanning system is increased, and at the same time, the effective area that can transmit X-rays is improved.
[0079] Optionally, in combination with Figure 12As shown, at least some of the plurality of hollow areas 112 distributed in the X direction of the first plate body 110 have different lengths, and at least some of the plurality of hollow areas 112 distributed in the Z direction of the first plate body 110 have different lengths.
[0080] In this embodiment, for the plurality of hollow areas 112 distributed in the X direction, the lengths of these hollow areas 112 in the Z direction can be partially different. The lengths of the plurality of hollow areas 112 in the Z direction can be the same or different. In this way, the plurality of hollow areas 112 distributed in multiple rows and columns can be staggered, so that two adjacent hollow areas 112 have different lengths. In this way, the processing deformation of the hollow area 112 can be reduced, and the structural rigidity of the substrate can be improved.
[0081] In some embodiments, combined with Figure 12 As shown, in the multiple rows of hollow areas 112 distributed in the X direction, the number of hollow areas 112 in each row is the same.
[0082] In some embodiments, in the multiple rows of hollow areas 112 distributed in the X direction, the number of hollow areas 112 in each row is different.
[0083] In this embodiment, the number of the multiple hollow areas 112 in each row distributed in the X direction can be the same or different, and can be set according to the specific application scenario. In this way, the deformation amounts of the first plate body 110 and the second plate body 120 can be reduced, and the rigidities of the first plate body 110 and the second plate body 120 can be improved. Among them, the specific number of the hollow areas 112 set in each row is not specifically limited, and can be 3, 4 or more, and is selected and set according to the specific structure and specific dimensions.
[0084] In some embodiments, combined with Figure 11 and Figure 12 As shown, in the multiple rows of hollow areas 112 distributed in the X direction, the total length of the hollow areas 112 in each row in the Z direction is the same.
[0085] In this embodiment, the overall lengths of the multiple rows of hollow areas 112 in the X direction of the first plate body 110 are the same. Even if the lengths of the multiple hollow areas 112 in each row are different or the number of the hollow areas 112 included in each row is different, the lengths of the entire row of hollow areas 112 are the same. That is, the formed hollow areas 112 are rectangularly distributed, which can increase the effective area covered by the detector, and further expand the effective imaging range of the CT scanning system.
[0086] In some embodiments, combined with Figure 4 、 Figure 5 、 Figure 7 and Figure 9 、 Figure 11As shown, the number of the second plate bodies 120 is multiple, and one second plate body 120 is arranged in a single hollow area 112.
[0087] In this embodiment, the number of the second plate bodies 120 is the same as that of the hollow areas 112 of the first plate body 110. In this way, a second plate body 120 can be correspondingly arranged in each hollow area 112 one by one to form a precision aperture plate. In this way, during the operation of the CT scanning system, X-rays pass through the multiple grid holes 102 of the precision aperture plate and are projected onto the chip, corresponding to the pixels on the chip one by one, so as to further reduce the pixel size and improve the image resolution.
[0088] In some embodiments, such as Figure 13 , the first plate body 110 is a multi-layer structure stacked in the thickness direction of the first plate body 110.
[0089] In this embodiment, the first plate body 110 is a multi-layer structure stacked in the thickness direction of the first plate body 110. In other words, the first plate body 110 includes multiple first sub-plate bodies, and the multiple first sub-plate bodies are stacked in the thickness direction of the first plate body 110. The multiple first sub-plate bodies can be fixed by bonding or welding. By stacking multiple first plate bodies 110 in the Y direction to meet different thickness requirements, where the Y direction refers to the thickness direction of the first plate body 110. And by using multiple first plate bodies 110, the thickness of a single first plate body 110 can be reduced, thereby reducing the cutting difficulty of the hollow area 112, reducing the processing deformation, and improving the shape and accuracy of the spliced grid holes 102.
[0090] In some embodiments, in combination with Figure 13 shown, the second plate body 120 is a multi-layer structure stacked in the thickness direction of the second plate body 120.
[0091] In this embodiment, the second plate body 120 is a multi-layer structure stacked in the thickness direction of the second plate body 120. In other words, the second plate body can include multiple second sub-plate bodies, and the multiple second sub-plate bodies are stacked in the thickness direction of the second plate body 120. The multiple second sub-plate bodies can be fixed by bonding or welding. Compared with directly processing the second plate body by wire cutting, by first processing the second sub-plate bodies and then stacking the multiple second sub-plate bodies, since the thickness of the sub-plate bodies is relatively thin, the cutting difficulty of the groove body 122 can be reduced, and the processing deformation can be reduced, thereby improving the shape and accuracy of the spliced grid holes 102. At the same time, by controlling the stacking number of the second sub-plate bodies, the thickness of the second plate body 120 can be changed to meet different application requirements.
[0092] In some embodiments, the second plate body and the first plate body can be fixed by optical glue or welding, or a stepped structure can be provided on the first plate body or the second plate body. Through the stepped structure, the second plate body is lapped on the first plate body.
[0093] In some embodiments, in combination Figure 4 As shown, the grid plate assembly 100 further includes: a cover plate 130. The cover plate 130 is stacked on at least one side of the first plate body 110 for limiting the second plate body 120.
[0094] In this embodiment, along the Y direction of the first plate body 110, the cover plate 130 is stacked on at least one side of the first plate body 110. The cover plate 130 is used to limit and fix the second plate body 120 disposed in the hollow area 112. In this way, the stability of the second plate body 120 during installation and use can be improved.
[0095] Optionally, the cover plate 130 is fixed to the first plate body 110 by bonding or screws to prevent the second plate body 120 from displacing.
[0096] Optionally, cover plates 130 are provided on both sides of the first plate body 110. The second plate body 120 placed in the hollow area 112 of the first plate body 110 is limited by the cover plates 130 on both sides to improve the stability during application.
[0097] Optionally, after the second plate body 120 is embedded in the first plate body 110, the two can be fixed by a glue such as optical glue that has little impact on the X-ray transmittance to improve the stability of the grid plate structure. In some embodiments, the material of the first plate body 110 includes tungsten, molybdenum, lead, tungsten alloy, molybdenum alloy, lead alloy or other materials with a relatively high atomic number.
[0098] In this embodiment, the material of the first plate body 110 is tungsten, molybdenum, lead, tungsten alloy, molybdenum alloy, lead alloy or other materials with a relatively high atomic number. These materials can shield scattered X-rays and achieve the occlusion of X-rays in a specific area.
[0099] In some embodiments, the material of the second plate body 120 includes tungsten, molybdenum, lead, tungsten alloy, molybdenum alloy, lead alloy or other materials with a relatively high atomic number.
[0100] In this embodiment, the material of the first plate body 110 is tungsten, molybdenum, lead, tungsten alloy, molybdenum alloy, lead alloy or other materials with a relatively high atomic number. These materials can shield scattered X-rays and achieve the occlusion of X-rays in a specific area.
[0101] In some embodiments, the material of the cover plate 130 includes aluminum, plastic or carbon fiber.
[0102] In this embodiment, the material of the cover plate 130 is preferably a material with a relatively low atomic number such as aluminum, plastic, or carbon fiber. The above materials can reduce the attenuation of useful rays, so as to facilitate the transmission of X-rays and reduce energy attenuation.
[0103] Optionally, as shown in combination with Figure 5 and Figures 11 to 13 , the hollowed-out area 112 is a rectangular hole, which is convenient for processing and the installation of the second plate body 120. The structure of the second plate body 120 matches the structure of the hollowed-out area 112 to facilitate assembly.
[0104] In some embodiments, a CT scanning system is provided, including: a ray source and a detector; and the grid plate assembly 100 as described in any of the above embodiments. The grid plate assembly 100 is located between the ray source and the detector and is disposed adjacent to the detector.
[0105] The CT scanning system provided by the embodiments of the present disclosure includes: a ray source, a detector, and the grid plate assembly 100 as described in any of the above embodiments. The grid plate assembly 100 is located between the ray source and the detector and is disposed adjacent to the detector. The detector can be a scintillator detector or a photon counting detector.
[0106] The CT scanning system of the embodiments of the present disclosure adopts the grid plate assembly 100 of any of the above embodiments, so it has all the beneficial effects of the grid plate assembly 100, which will not be elaborated one by one here.
[0107] Moreover, the CT scanning system of the embodiments of the present disclosure adopts the grid plate assembly 100 of any of the above embodiments, which can improve the dimensional accuracy, shape, and position accuracy of multiple grid holes 102, and thus can meet the requirements of high resolution for imaging of the CT scanning system.
[0108] In this way, adopting the grid plate assembly 100 of the embodiments of the present disclosure can meet the high-resolution requirements of the CT scanning system for generating images, and can reduce the processing difficulty, improve the yield rate, enhance the manufacturing accuracy, and reduce the production cost.
[0109] The above description and the drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural and other changes. The embodiments only represent possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations can vary. Parts and features of some embodiments can be included in or replaced by parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.
Claims
1. A grid plate assembly, characterized in that, Comprising: A first plate body, provided with a hollowed-out area; A second plate body, disposed within the hollowed-out area and defining a plurality of grid holes with the first plate body.
2. The grid plate assembly according to claim 1, wherein The hollowed-out area includes a first area for accommodating the second plate body and a plurality of second areas communicating with the first area, and the plurality of second areas form a plurality of grid holes.
3. The grid plate assembly according to claim 1, wherein The hollowed-out area includes a first area for accommodating the second plate body and a plurality of second areas communicating with the first area; A plurality of grooves penetrating in the thickness direction of the second plate body are provided on the side wall of the second plate body; Wherein, the plurality of grooves correspond to the plurality of second areas one by one, and the area defined by each groove and the corresponding second area form a grid hole.
4. The grid plate assembly according to claim 1, wherein A plurality of grooves penetrating in the thickness direction of the second plate body are provided on the side wall of the second plate body, and the areas defined by the plurality of grooves form a plurality of grid holes.
5. The grid plate assembly according to any one of claims 1 to 4, wherein There are a plurality of hollowed-out areas, the second plate body corresponds to the hollowed-out areas one by one, and the plurality of hollowed-out areas are distributed in multiple rows and multiple columns.
6. The grid plate assembly according to claim 5, wherein The hollowed-out areas are strip-shaped, and the lengths of the plurality of hollowed-out areas in the same row or the same column are the same or include at least two lengths.
7. The grid plate assembly according to any one of claims 1 to 4, wherein The first plate body is a multi-layer structure stacked in the thickness direction of the first plate body; and / or, The second plate body is a multi-layer structure stacked in the thickness direction of the second plate body.
8. The grid plate assembly according to any one of claims 1 to 4, wherein The second plate body and the first plate body are fixed by optical glue or welding; or, A step structure is provided on the first plate body or the second plate body, and through the step structure, the second plate body is lapped on the first plate body.
9. The grid plate assembly according to any one of claims 1 to 4, characterized in that, Further comprising: A cover plate, stacked on at least one side of the first plate body, for limiting the second plate body.
10. A CT scanning system, characterized in that, Comprising: A radiation source and a detector; And The grid plate assembly according to any one of claims 1 to 9, the grid plate assembly is located between the radiation source and the detector and is disposed adjacent to the detector.