Detector module and CT detection system

Abstract

The utility model relates to the technical field of medical equipment, and discloses a detector module and a CT detection system. The detector module comprises a plurality of ray receiving units and a plurality of grating units arranged on the plurality of ray receiving units, and the plurality of grating units and the plurality of ray receiving units are arranged along the same direction; wherein at least one grating unit is arranged corresponding to more than one ray receiving unit. According to the embodiment, the arrangement number of the grating units can be reduced, and the manufacturing cost and difficulty are reduced.

Description

Technical Field

[0001] This application relates to the field of medical device technology, such as a detector module and a CT detection system. Background Technology

[0002] In CT scanners, antiscattering gratings (also known as collimators) are mounted above the X-ray receiving module of the detector to reduce the impact of scattered rays on image quality. Traditional antiscattering grating manufacturing processes include sheet metal bending, insert splicing, and laser 3D printing. During grating manufacturing, to ensure sufficient rays pass through the antiscattering grating to reach the receiving unit, the grating walls are typically made very thin (e.g., less than 0.1 mm).

[0003] As the number of layers in a CT detector increases, the number of detector pixel units also increases, meaning there are more and more X-ray receiving units, and the overall length of the grating also increases, sometimes reaching 300mm. The increase in the length of the anti-scattering grating leads to a corresponding increase in the difficulty and cost of grating manufacturing.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0006] This disclosure provides a detector module and a CT detection system that can reduce the manufacturing cost and difficulty of gratings.

[0007] According to the first embodiment provided in this application, a detector module is provided, which includes a plurality of X-ray receiving units and a plurality of grating units disposed on the plurality of X-ray receiving units, wherein the plurality of grating units and the plurality of X-ray receiving units are arranged in the same direction; wherein at least one grating unit is correspondingly disposed to more than one X-ray receiving unit.

[0008] In some alternative embodiments, each grating unit is configured to correspond to an integer number of ray receiving units.

[0009] In some alternative embodiments, the two opposite sidewalls of two adjacent grating units are first outer sidewalls; the gap between two adjacent ray receiving units is blocked by at least one of the two opposite first outer sidewalls.

[0010] In some alternative embodiments, the detector module further includes: a filler disposed between the first outer walls of two adjacent grating units; the overall thickness of the two first outer walls and the filler located on the gap between two adjacent ray receiving units is greater than or equal to the gap width.

[0011] In some alternative embodiments, the first outer wall located on the gap between two adjacent ray receiving units has an overall thickness greater than or equal to the thickness of the inner grid sidewall of the grating unit.

[0012] In some alternative embodiments, the thickness of the lower end of at least one of the first outer sidewalls located in the gap between two adjacent ray receiving units is greater than the thickness of the inner grid sidewall of the grating unit.

[0013] In some alternative embodiments, the thickness of the upper end of the first outer wall, which is greater than the thickness of the inner grid sidewall of the grating unit, is less than the thickness of the lower end.

[0014] In some optional embodiments, the detector module further includes: a grating fixing unit connected to the grating units at both ends of a plurality of grating units, wherein the sidewall of the grating unit connected to the grating fixing unit is a second outer sidewall, and the thickness of the second outer sidewall is greater than the thickness of the inner grid sidewall of the grating unit.

[0015] In some alternative embodiments, the second outer sidewall is disposed opposite to the first outer sidewall, and the thickness of the second outer sidewall is greater than the thickness of the first outer sidewall.

[0016] According to a second embodiment provided in this application, a CT detection system is provided, including a detector module as described in any of the preceding claims.

[0017] The detector module and CT detection system provided in this disclosure can achieve the following technical effects:

[0018] In this optional embodiment, multiple grating units are disposed on multiple X-ray receiving units. X-rays can pass through the grating units and be received by the X-ray receiving units. The X-ray receiving units can convert the X-rays into analog signals and transmit these analog signals to other components of the CT detection system, enabling the CT detection system to output detection images. The detector module includes multiple grating units arranged along one direction on multiple X-ray receiving units, reducing the length of individual grating units, lowering the manufacturing complexity of the grating units, and reducing the manufacturing cost of the detector module.

[0019] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0020] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0021] Figure 1 This is a schematic diagram of the structure of a detector module provided in an embodiment of this disclosure;

[0022] Figure 2 This is a schematic diagram of the structure of a grating unit provided in an embodiment of this disclosure;

[0023] Figure 3 yes Figure 2 A magnified structural diagram of part a;

[0024] Figure 4 yes Figure 2 A magnified structural diagram of part b in the middle;

[0025] Figure 5 This is a schematic diagram of the structure of another grating unit provided in an embodiment of this disclosure from one viewpoint;

[0026] Figure 6 This is a schematic diagram of another grating unit provided in an embodiment of this disclosure from another perspective;

[0027] Figure 7 This is a schematic diagram of another detector module provided in an embodiment of this disclosure.

[0028] Figure label:

[0029] 100, grating unit; 110, first outer sidewall; 120, second outer sidewall; 130, grid sidewall;

[0030] 200. X-ray receiving unit;

[0031] 300, Grating fixing unit; 310, Fixing plate; 320, Reinforcing rib; 330, Fixing protrusion. Detailed Implementation

[0032] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0033] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0034] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0035] Furthermore, the terms "setup," "connection," and "installation" should be interpreted broadly. For example, "connection" can refer to an installation connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can refer to the internal communication between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0036] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0038] This disclosure provides a detector module, such as... Figure 1 and Figure 2 As shown, the detector module includes multiple X-ray receiving units 200 and multiple grating units 100 disposed on the multiple X-ray receiving units 200. The multiple grating units 100 and the multiple X-ray receiving units 200 are arranged in the same direction. At least one grating unit 100 is corresponding to more than one X-ray receiving unit 200.

[0039] In this embodiment, multiple grating units 100 are disposed on multiple X-ray receiving units 200. X-rays can pass through the grating units 100 and be received by the X-ray receiving units 200. The X-ray receiving units 200 can convert the X-rays into analog signals and transmit the analog signals to other unit components of the CT detection system so that the CT detection system can output detection images.

[0040] The detector module includes multiple grating units 100 arranged along one direction. At least one grating unit 100 corresponds to more than one X-ray receiving unit 200. That is, the X-ray receiving unit 200 corresponding to one grating unit 100 can be multiple X-ray receiving units 200, or it can be a combination of one or more X-ray receiving units and a portion of one X-ray receiving unit. Compared to a detector module that includes only one grating unit 100, this reduces the length of a single grating unit 100, lowers the manufacturing complexity of the grating unit 100, and reduces the manufacturing cost of the detector module. Furthermore, compared to a grating unit 100 that needs to be installed separately for each X-ray receiving unit, this reduces the number of grating units, reduces the accumulation of errors during the installation process of the grating units 100, and improves the overall assembly accuracy and consistency of the detector module.

[0041] For example, each grating unit 100 is configured to correspond to an integer number of ray receiving units 200. That is, each grating unit corresponds to 2, 3 or 4 ray receiving units 200.

[0042] For example, such as Figure 1 As shown, one grating unit 100 is correspondingly arranged with two ray receiving units 200.

[0043] Or, such as Figure 7 As shown, one grating unit 100 is correspondingly arranged with four ray receiving units 200.

[0044] This reduces the number of grating units 100 by at least half, decreasing error accumulation during installation and improving the overall assembly accuracy and consistency of the detector module. Furthermore, the splicing positions of adjacent grating units correspond to the gaps between adjacent receiving units. Since the gaps between adjacent receiving units are invalid areas that cannot convert X-rays into analog signals, this reduces the design difficulty of the splicing positions of adjacent grating units and expands the design space for their splicing positions.

[0045] Optionally, among the multiple grating units 100, the number of ray receiving units 200 corresponding to different grating units 100 may be the same or different.

[0046] In some alternative embodiments, such as Figure 1 and Figure 7As shown, multiple grating units 100 and multiple ray receiving units 200 are arranged in an arc shape or horizontally, respectively.

[0047] In this embodiment, multiple grating units 100 and multiple X-ray receiving units 200 are arranged in an arc shape or horizontally, that is, multiple grating units 100 and multiple X-ray receiving units 200 are arranged along an arc direction or a horizontal direction to adapt to the CT detection system.

[0048] For example, rays are usually emitted radially. When there are a large number of grating units 100 and ray receiving units 200, the arc arrangement allows the grating units 100 and ray receiving units 200 to be arranged on an arc segment concentric with the ray focal point. This improves the matching degree between the grating of the grating unit 100 and the ray receiving unit 200 and the rays emitted by the ray source, so as to more effectively capture and guide the rays. This makes the rays maintain a more consistent incident angle when passing through the grating unit 100 and the ray receiving unit 200, reduces errors, improves signal strength and accuracy, reduces signal distortion caused by angular deviation, and improves imaging quality.

[0049] When there are a large number of grating units 100 and X-ray receiving units 200, the irradiation angles of the X-rays in the same plane are relatively similar, so they can be arranged horizontally to reduce the difficulty of production and assembly of the detector module.

[0050] In some alternative embodiments, the two opposite sidewalls of two adjacent grating units 100 are first outer sidewalls 110. The gap between two adjacent ray receiving units 200 is blocked by at least one of the two opposite first outer sidewalls 110.

[0051] In this embodiment, multiple grating units 100 and multiple ray receiving units 200 are arranged in the same direction, and there is a gap between two adjacent ray receiving units 200. In the multiple ray receiving units 200 corresponding to a grating unit 100, the gap between two adjacent ray receiving units 200 can be blocked by the grating unit 100.

[0052] In the two ray receiving units 200 corresponding to the connection of two adjacent grating units 100, the gap between the two ray receiving units 200 can be blocked by one or both of the two opposing first outer side walls 110, so as to reduce the scattering and leakage of rays at the gap, reduce artifacts or noise caused by the gap, improve the clarity and contrast of the image, and improve the image quality.

[0053] In some alternative embodiments, the detector module further includes a filler disposed between the first outer sidewalls 110 of two adjacent grating units 100. The overall thickness of the two first outer sidewalls 110 and the filler located in the gap between two adjacent ray receiving units 200 is greater than or equal to the gap width.

[0054] In this embodiment, a filler is provided between the two opposing first outer walls 110 of two adjacent grating units 100. The filler can fill the gap between the two adjacent grating units 100. The filler can be an optical adhesive, and the two adjacent grating units 100 are bonded together by the optical adhesive. The overall thickness of the two first outer walls 110 and the filler located on the gap between two adjacent ray receiving units 200 is greater than or equal to the gap width. Thus, at least one of the opposing first outer walls 110 and the filler can block the gap between the two adjacent ray receiving units 200. For example, only the filler blocks the gap between the two adjacent ray receiving units 200, or the filler and one first outer wall 110 block the gap between the two adjacent ray receiving units 200, or the filler and both first outer walls 110 block the gap between the two adjacent ray receiving units 200.

[0055] In some alternative embodiments, the thickness of one or both of the first outer sidewalls 110 located in the gap between two adjacent ray receiving units 200 is greater than or equal to the thickness of the inner grid sidewall of the grating unit 100.

[0056] When the thickness of one of the first outer sidewalls 110 is greater than or equal to the thickness of the inner grid sidewall of the grating unit 100, the thickness of the other outer sidewall can be less than the thickness of the inner grid sidewall of the grating unit 100. The gap between two adjacent ray receiving units 200 can be blocked by the thicker first outer sidewall 110, or the two opposing first outer sidewalls 110 can also block simultaneously. In this case, the two opposing first outer sidewalls 110 are asymmetrically arranged at the gap.

[0057] When the thickness of both first outer sidewalls 110 is simultaneously greater than or equal to the thickness of the inner grid sidewall of the grating unit 100, the two first outer sidewalls 110 can simultaneously block the gap between two adjacent ray receiving units 200. Optionally, the two first outer sidewalls 110 have the same thickness, that is, the two oppositely arranged first outer sidewalls 110 are symmetrically arranged at the gap. Alternatively, the two first outer sidewalls 110 may have different thicknesses, that is, the two oppositely arranged first outer sidewalls 110 are asymmetrically arranged at the gap.

[0058] In this embodiment, multiple grating units 100 are connected sequentially along one direction, and two opposite first outer sidewalls 110 of two adjacent grating units 100 are connected. The thickness of the two opposite first outer sidewalls 110 is greater than or equal to the thickness of the internal grid sidewall 130 of the grating unit 100, which can also increase the strength of the first outer sidewalls 110, reduce the risk of deformation of the grating unit 100 during use, and improve the overall stability and durability of the detector module.

[0059] Furthermore, by increasing the thickness of the first outer wall 110, the strength of the connection between two adjacent grating units 100 can be improved, thereby enhancing the operational stability and reliability of the detector module.

[0060] For example, two adjacent grating units 100 include a first grating unit and a second grating unit. At the connection between the first grating unit and the second grating unit, the first outer sidewall of the first grating unit and the first outer sidewall of the second grating unit are disposed opposite to each other and connected. The thickness of the first outer sidewall of the first grating unit and the thickness of the first outer sidewall of the second grating unit are respectively greater than or equal to the thickness of the inner grid sidewall 130 of the grating unit 100. The thickness of the first outer sidewall of the first grating unit and the first outer sidewall of the second grating unit together block the gap between two corresponding adjacent ray receiving units 200.

[0061] Optionally, Figure 5 and Figure 6 The grating unit 100 shown is the end grating unit among a plurality of grating units 100. For example... Figure 5 and Figure 6 As shown, among the multiple grating units 100, the number of first outer sidewalls 110 of the grating unit at the end is one, and the first outer sidewall 110 of the grating unit at one end is disposed toward the grating unit at the middle or the other end.

[0062] Optionally, Figure 2 The grating unit 100 is the central grating unit among a plurality of grating units 100.

[0063] like Figure 2 As shown, among the multiple grating units 100, the number of first outer sidewalls 110 of the middle grating unit is two, and the two first outer sidewalls 110 of the middle grating unit are respectively located on both sides of the middle grating unit.

[0064] In some alternative embodiments, a first outer wall 110 is located on the gap between two adjacent ray receiving units 200. The thickness of the lower end of at least one first outer wall 110 is greater than the thickness of the inner grid sidewall of the grating unit 100.

[0065] In this embodiment, the thickness of the lower end of one or two first outer sidewalls 110 is greater than the thickness of the inner grid sidewall of the grating unit 100, so that the lower end of the first outer sidewall 110 can block the gap between two adjacent ray receiving units 200. Furthermore, when the grating units 100 are arranged in an arc shape, two adjacent first outer sidewalls 110 can be directly and tightly connected to improve the connection strength and the blocking effect on the gap.

[0066] For example, the thickness of the upper end of the first outer wall 110, which has a lower end thickness greater than the thickness of the inner grid sidewall of the grating unit 100, is less than the lower end thickness.

[0067] In this embodiment, the thickness of the upper end of the first outer wall 110, which is thicker than the thickness of the inner grid sidewall of the grating unit 100, is less than the thickness of the lower end. That is, when the thicknesses of the upper and lower ends of the first outer wall 110 are different, the thickness of the upper end of the first outer wall 110 is less than the thickness of the lower end of the first outer wall 110. In this way, when the grating units 100 are arranged in an arc shape, the opposing walls of the two opposing first outer walls 110 can be tightly connected, thereby improving the connection strength of the grating units 100 and the shielding effect on the gap between the two adjacent ray receiving units 200.

[0068] Optionally, the thickness of the first outer side wall 110 gradually increases along the vertical direction of the first outer side wall 110.

[0069] In some optional embodiments, the detector module further includes a grating fixing unit 300, which is connected to the grating units at both ends of a plurality of grating units 100. The sidewall of the grating unit 100 connected to the grating fixing unit 300 is a second outer sidewall 120, and the thickness of the second outer sidewall 120 is greater than the thickness of the inner grid sidewall of the grating unit 100.

[0070] In this embodiment, multiple grating units 100 are connected sequentially, and a grating fixing unit 300 is connected to the grating units at both ends of the multiple grating units 100. This allows the grating fixing unit 300 to fix the multiple grating units 100 through the grating units at both ends, reducing displacement and deformation of the grating units 100 during use and improving the operational stability and reliability of the detector module. Furthermore, the grating fixing unit 300 can reduce the occurrence of loosening or detachment of the multiple grating units 100 during assembly and transportation of the detector module, improving the durability of the detector module and reducing the frequency of maintenance and replacement.

[0071] The sidewall of the grating unit 100 connected to the grating fixing unit is the second outer sidewall 120, and the thickness of the second outer sidewall 120 is greater than the thickness of the inner grid sidewall of the grating unit 100. This increases the thickness of the second outer sidewall 120, reduces the risk of deformation of the grating unit 100 during installation and use, and improves the durability of the detector module.

[0072] For example, the second outer side wall 120 is disposed opposite to the first outer side wall 110, and the thickness of the second outer side wall 120 is greater than the thickness of the first outer side wall 110.

[0073] In this embodiment, among the multiple grating units 100, the two opposite sidewalls of one end grating unit are a first outer sidewall 110 and a second outer sidewall 120, respectively. The first outer sidewall 110 faces the middle grating unit or the other end grating unit, and the second outer sidewall 120 faces away from the middle grating unit or the other end grating unit. During the installation of the detector module, the multiple grating units 100 are connected and fixed through the second outer sidewall 120. The force on the second outer sidewall 120 is greater than or equal to the force on the first outer sidewall 110, and the thickness of the second outer sidewall 120 is greater than the thickness of the first outer sidewall 110, so as to further improve the strength of the second outer sidewall 120 and improve the working stability and reliability of the detector module.

[0074] In one alternative embodiment, such as Figure 5 and Figure 6 As shown, the grating fixing unit 300 includes a fixing plate 310 and a reinforcing rib 320. The fixing plate 310 is connected to the second outer side wall 120 of the grating unit at the end. The reinforcing rib 320 is connected to the upper or lower surface of the fixing plate 310 and to the second outer side wall 120.

[0075] In this embodiment, the fixing plate 310 is connected to the second outer side wall 120 of the end grating unit. The end grating unit can be fixed by the fixing plate 310, thereby fixing multiple grating units 100 to reduce the displacement or tilting of the grating units 100 during use.

[0076] The fixing plate 310 extends in a direction away from the second outer side wall 120, and the reinforcing rib 320 is connected to the upper or lower surface of the fixing plate 310 to improve the rigidity and load-bearing capacity of the fixing plate 310. Furthermore, the connection between the reinforcing rib 320 and the second outer side wall 120 can disperse the external stress applied to the second outer side wall 120, reducing the occurrence of deformation of the grating unit at the end of the second outer side wall 120.

[0077] The fixing plate 310 and the reinforcing rib 320 can increase the vibration resistance of the grating unit 100 and reduce the misalignment of the grating unit 100 caused by mechanical vibration, thereby improving the stability and accuracy of imaging.

[0078] In another alternative embodiment, such as Figure 7 As shown, the grating fixing unit 300 includes a fixing protrusion 330, which is connected to the second outer side wall 120 of the end grating unit. The second outer side wall 120 is the outer side wall of the end grating unit away from the connection point of two adjacent grating units 100.

[0079] In this embodiment, the grating fixing unit 300 includes a fixing protrusion 330, which can be adapted to the groove of the frame of the CT detection system to fix the grating unit at the end, thereby fixing multiple grating units 100, reducing the displacement or tilting of the grating units 100 during use, and improving the stability and accuracy of imaging.

[0080] In some alternative embodiments, the grating fixing unit 300 is integrally formed with the grating unit 100.

[0081] By adopting this optional embodiment, the one-piece molding configuration can reduce the assembly steps and time between the grating fixing unit 300 and the grating unit 100, simplify the manufacturing process, and reduce production costs.

[0082] Furthermore, it can improve the structural strength and stability of the grating fixing unit 300 and the grating unit 100, and extend the service life of the detector module.

[0083] Alternatively, the grating unit 100 is manufactured using a metal 3D printing process.

[0084] Optionally, the first outer sidewall 110 is processed by wire cutting to improve the surface accuracy of the first outer sidewall 110 and meet the connection accuracy requirements of the two connected grating units 100.

[0085] Optionally, two adjacent grating units 100 are connected by adhesive bonding.

[0086] Optionally, the detector module also includes a data conversion and processing board, which is connected to the X-ray receiving unit 200. The data conversion and processing board is capable of receiving analog signals output by the X-ray receiving unit 200 and processing the analog signals into digital signals.

[0087] Optionally, the number of data conversion and processing boards is the same as the number of X-ray receiving units 200 and they correspond one-to-one.

[0088] Optionally, the grating unit 100, the ray receiving unit 200, and the data conversion and processing board are stacked sequentially along the extension direction of the ray.

[0089] This disclosure provides a CT detection system, including the detector module described in any of the above embodiments.

[0090] The CT detection system provided in this disclosure includes the detector module described in any of the above embodiments, and therefore has all the beneficial effects of the detector module described in any of the above embodiments, which will not be repeated here.

[0091] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A detector module, characterized in that, It includes multiple X-ray receiving units and multiple grating units disposed on the multiple X-ray receiving units, with the multiple grating units and the multiple X-ray receiving units arranged in the same direction; wherein at least one grating unit is disposed corresponding to more than one X-ray receiving unit.

2. The detector module according to claim 1, characterized in that, Each grating unit is associated with an integer number of ray receiving units.

3. The detector module according to claim 1 or 2, characterized in that, The two opposite sidewalls of two adjacent grating units are the first outer sidewalls; The gap between two adjacent ray receiving units is blocked by at least one of the two opposing first outer walls.

4. The detector module according to claim 3, characterized in that, Also includes: The filler is disposed between the first outer sidewalls of two adjacent grating units; The overall thickness of the two first outer walls and the filler on the gap between two adjacent ray receiving units is greater than or equal to the gap width.

5. The detector module according to claim 3, characterized in that, The first outer wall located on the gap between two adjacent ray receiving units, the thickness of one or both of the first outer walls is greater than or equal to the thickness of the grid sidewall inside the grating unit.

6. The detector module according to claim 3, characterized in that, The first outer wall located on the gap between two adjacent ray receiving units; The thickness of the lower end of at least one of the first outer sidewalls is greater than the thickness of the inner grid sidewall of the grating unit.

7. The detector module according to claim 6, characterized in that, The thickness of the upper end of the first outer wall is less than the thickness of the lower end, while the thickness of the lower end is greater than the thickness of the inner grid sidewall of the grating unit.

8. The detector module according to claim 3, characterized in that, Also includes: A grating fixing unit is connected to the grating units at both ends of a plurality of grating units. The sidewall of the grating unit connected to the grating fixing unit is a second outer sidewall, and the thickness of the second outer sidewall is greater than the thickness of the inner grid sidewall of the grating unit.

9. The detector module according to claim 8, characterized in that, The second outer side wall is disposed opposite to the first outer side wall, and the thickness of the second outer side wall is greater than the thickness of the first outer side wall.

10. A CT detection system, characterized in that, include: The detector module as described in any one of claims 1 to 9.

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