Flat panel detector

Abstract

The flat panel detector provided by the utility model has good structural performance. The flat panel detector comprises an outer frame which comprises a side wall, and the side wall forms an accommodating space in a surrounding manner; the middle frame is arranged in the containing space, the middle frame comprises a flat plate structure and a bending part formed by bending along the edge of the flat plate structure, and a bending space is formed in the direction perpendicular to the flat plate structure; and a plurality of printed circuit boards, the plurality of printed circuit boards comprise a first printed circuit board and a second printed circuit board, and the first printed circuit board and the second printed circuit board are accommodated in the bending space.

Description

Technical Field

[0001] The present application relates to the field of photoelectric detection technology, and more specifically, to a flat panel detector. Background Art

[0002] X-ray detection technology is widely used in medical testing, industrial non-destructive testing, security inspection and security protection, etc. The performance of X-ray detectors is closely related to the quality of the images they collect. Its key parameters include spatial resolution, response uniformity, contrast sensitivity, dynamic range, acquisition speed, and frame rate. The structure of the detector directly affects the above parameters. Therefore, how to improve the structural performance of flat-panel detectors has become a problem that needs to be solved. Utility Model Content

[0003] The present application provides a flat panel detector having good structural performance.

[0004] In a first aspect, a flat-panel detector is provided, comprising: an outer frame, comprising side walls, wherein the side walls surround and form a receiving space; a middle frame, disposed in the receiving space, wherein the middle frame comprises a flat plate structure, and a bending portion formed by bending along an edge of the flat plate structure to form a bending space in a direction perpendicular to the flat plate structure; and a plurality of printed circuit boards, wherein the plurality of printed circuit boards comprise a first printed circuit board and a second printed circuit board, wherein the first printed circuit board and the second printed circuit board are received in the bending space.

[0005] The flat-panel detector provided in the present application includes an outer frame and a middle frame. The middle frame is sleeved in a accommodating space formed in the side wall of the outer frame, and the middle frame includes a flat plate structure and a bent portion formed by bending along the edge of the flat plate structure, so that the middle frame has a "U"-shaped structure, forming a space for accommodating a printed circuit board in the flat-panel detector in a direction perpendicular to the flat plate structure, and the "U"-shaped structure can avoid interference between mechanisms in the flat-panel detector.

[0006] In a possible implementation, the first printed circuit board is fixed to the inner surface of the flat structure on a side facing the bending portion, and a plurality of first threaded columns are provided on the flat structure, and the first threaded columns are used to fix the second printed circuit board to the flat structure and support the second printed circuit board on a side of the first printed circuit board away from the flat structure.

[0007] In this implementation, the first printed circuit board and the second printed circuit board can be overlapped, wherein the first printed circuit board is fixed to the inner surface of the flat plate structure of the middle frame, and the second printed circuit board is supported on the side of the first printed circuit board away from the flat plate structure through the first threaded column and fixed to the flat plate structure of the middle frame through the first threaded column, thereby realizing the need to set up multiple printed circuit boards in a limited space.

[0008] In a possible implementation, the flat-panel detector further includes a third printed circuit board, which is fixed to the bending portion and the flat-panel structure at the same time. The flat-panel structure is further provided with a plurality of second threaded columns, which are used to fix the third printed circuit board to the flat-panel structure and support the third printed circuit board on a side of the second printed circuit board away from the flat-panel structure.

[0009] In this implementation, the flat-panel detector also includes a third printed circuit board, which is fixed to the flat-panel structure and the bending portion at the same time, wherein a second threaded column is also provided on the flat-panel structure, and the third printed circuit is supported on a side of the second printed circuit board away from the flat-panel structure through the second threaded column and is fixed to the flat-panel structure of the middle frame through the second threaded column, thereby effectively fixing the third printed circuit board.

[0010] In a possible implementation, a chip is disposed on the second printed circuit board, and the flat panel detector further includes a metal heat sink fixed to an edge of the outer frame and disposed in contact with the chip, wherein the metal heat sink is used to dissipate heat from the chip.

[0011] In this implementation, a metal heat sink is provided in the flat panel detector, which can effectively dissipate the heat of the chip on the second printed circuit board.

[0012] In a possible implementation, the flat plate structure is fixed to the edge of the outer frame through a connecting piece, a step is provided on the outer frame at a position corresponding to the bent portion, and the step abuts against the bent portion.

[0013] In a possible implementation, the flat panel detector further includes: a lead plate fixed to an outer surface of the flat panel structure on a side away from the bending portion, the lead plate being used to block radiation from irradiating the multiple printed circuit boards.

[0014] In this implementation, a lead plate is arranged in the flat panel detector and fixed to the outer surface of the flat panel structure of the middle frame, which can effectively block the passage of rays such as X-rays, thereby preventing the rays from penetrating the detection panel and causing damage to the printed circuit board.

[0015] In a possible implementation, the flat panel detector also includes: a panel assembly, the panel assembly is arranged on a side of the lead plate away from the middle frame, the panel assembly includes a first sponge layer, a second sponge layer, and a detection panel arranged between the first sponge layer and the second sponge layer, the detection panel includes a plurality of pixel units, a flexible circuit board is arranged at an edge area of ​​the detection panel, and the flexible circuit board is bent to the plurality of printed circuit boards.

[0016] In this implementation, the panel assembly in the flat panel detector can be arranged on the outer surface side of the flat panel structure of the middle frame, and its flexible circuit board is bent to the inner surface side of the flat panel structure, thereby realizing electrical connection between the detection panel and each connector.

[0017] In a possible implementation, the flat panel detector further includes: a carbon fiber plate fixed to the outer frame and covering an opening of the outer frame toward an outer surface of the flat panel structure.

[0018] In this implementation, the carbon fiber plate can be fixed on the outer frame as the upper cover of the flat panel detector, covering the opening formed by the outer frame from above, thereby closing the middle frame assembly formed by the middle frame and the printed circuit board.

[0019] In a possible implementation manner, the flat panel detector further includes: a metal cover plate fixed to the outer frame and covering an opening of the outer frame toward an inner surface of the flat panel structure.

[0020] In this implementation, the metal cover plate can be fixed on the outer frame as the lower cover of the flat panel detector, covering the opening formed by the outer frame from below, thereby closing the middle frame assembly formed by the middle frame and the printed circuit board.

[0021] In a possible implementation, a power board, a video graphics array board, and an indicator light board are further disposed in the accommodating space, and the power board, the video graphics array board, and the indicator light board are fixed to the side wall.

[0022] In this implementation, a power board, a video graphics array board, and an indicator light board etc. need to be arranged on the inner side of the side wall of the outer frame to realize relevant functions and ensure the normal operation of the flat panel detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0024] Figure 1It is an exploded view of the flat panel detector 1 according to the embodiment of the present application.

[0025] Figure 2 It is a cross-sectional view of the flat panel detector 1 according to the embodiment of the present application.

[0026] Figure 3 It is a schematic diagram of the structure of the outer frame of an embodiment of the present application.

[0027] Figure 4 It is a schematic diagram of the structure of the middle frame of an embodiment of the present application.

[0028] Figure 5 It is a schematic diagram of the assembly between the middle frame and the printed circuit board in an embodiment of the present application.

[0029] Figure 6 It is a schematic diagram of the assembly between the middle frame and the lead plate in an embodiment of the present application.

[0030] Figure 7 It is a schematic diagram of the assembly between the middle frame and the panel assembly in an embodiment of the present application.

[0031] Figure 8 It is a schematic diagram of the assembly between the middle frame assembly and the outer frame in an embodiment of the present application.

[0032] Fig. 9 It is a schematic diagram of the assembly between the carbon fiber plate and the outer frame of the embodiment of the present application.

[0033] Fig.10 It is a schematic diagram of the assembly between the metal cover plate and the outer frame of an embodiment of the present application. DETAILED DESCRIPTION

[0034] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0035] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0036] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0037] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0038] Radiation detectors, such as X-ray detectors, include direct and indirect types. Direct X-ray detectors can directly convert X-ray signals into digital signals, while indirect X-ray detectors can first convert X-ray signals into visible light signals, and then convert visible light signals into digital signals. The structural performance of X-ray detectors directly affects their detection effects.

[0039] To this end, the present application provides a structural design of a flat panel detector, so that the flat panel detector has good structural performance, thereby meeting its detection requirements.

[0040] Figure 1 and Figure 2 The structure of the flat panel detector 1 according to the embodiment of the present application is shown. Figure 1 This is an exploded view of the flat panel detector 1. Figure 2 is a cross-sectional view of the flat panel detector 1. Figure 1 and Figure 2 As shown, the flat panel detector 1 includes an outer frame 110 and a middle frame 120. The outer frame 110 is the main supporting and protecting component. The middle frame 120 is another important supporting component, which includes a flat plate structure 121 and a bending portion 122 formed by bending along the edge of the flat plate structure 121 to form a bending space in a direction perpendicular to the flat plate structure 121, that is, in the Z-axis direction.

[0041] like Figure 3 The structure of the outer frame 110 shown in the figure includes a side wall 111 . The side wall 111 surrounds and forms a receiving space, and the receiving space is used to receive the middle frame 120 .

[0042] like Figure 4The structure of the middle frame 120 shown in the figure has a "U"-shaped structure. Specifically, the middle frame 120 includes a flat plate structure 121 and a bending portion 122 formed by bending along the edge of the flat plate structure 121 to form a bending space in a direction perpendicular to the flat plate structure 121. The bending space can be used to accommodate components such as a printed circuit board in the flat panel detector 1.

[0043] It can be seen that the middle frame 120 is sleeved in the accommodating space formed by the side wall 111 of the outer frame 110, and the middle frame 120 includes a flat plate structure 121 and a bent portion 122 formed by bending along the edge of the flat plate structure 121, so that the middle frame 120 has a "U"-shaped structure, forming a space for accommodating components such as a printed circuit board in the flat panel detector 1 in a direction perpendicular to the flat panel structure 121, and the "U"-shaped structure can avoid interference between mechanisms in the flat panel detector 1.

[0044] The middle frame 120 may be formed of, for example, an aluminum alloy plate, and has a certain thickness, for example, 2 mm.

[0045] The flat panel detector 1 further includes a plurality of printed circuit boards (PCBs), such as a first printed circuit board 131 , a second printed circuit board 132 and a third printed circuit board 133 .

[0046] In some embodiments, the first printed circuit board 131 and the second printed circuit board 132 are accommodated in the bending space. For example, the first printed circuit board 131 is fixed to the inner surface of the flat structure 121 facing the bending portion 122. Figure 4 and Figure 5 As shown, the flat plate structure 121 is provided with threaded holes. Figure 4 Taking eight threaded holes 191 provided on two adjacent sides of the bending portion as an example, such as M3 threaded holes, the first printed circuit board 131 is fixed to the middle frame 120 through corresponding eight connecting members such as bolts, nuts and other fasteners.

[0047] In some embodiments, a plurality of first threaded columns 123 are further provided on the flat plate structure 121, and the first threaded columns 123 are used to fix the second printed circuit board 132 to the flat plate structure 121 and support the second printed circuit board 132 on a side of the first printed circuit board 131 away from the flat plate structure 121, thereby realizing the requirement of arranging multiple printed circuit boards in a limited space.

[0048] For example, Figure 4 and Figure 5As shown, six first threaded columns 123 are arranged on two adjacent sides of the bending portion 122. The first threaded columns 123 support the second printed circuit board 132 to a certain height so that it is stacked above the first printed circuit board 131, and the second printed circuit board is fixed to the flat plate structure 121 of the middle frame 120 through the first threaded columns 123.

[0049] Since the first printed circuit board 131 and the second printed circuit board 132 are overlapped, that is, the first printed circuit board 131 is fixed to the inner surface of the flat plate structure 121 of the middle frame 120, and the second printed circuit board is supported on the side of the first printed circuit board 131 away from the flat plate structure 121 through the first threaded column 123 and is fixed to the flat plate structure 121 of the middle frame 120 through the first threaded column 123, the need to set up multiple printed circuit boards is met in a limited space, saving space of the flat plate detector 1 in the Z-axis direction, which is conducive to reducing the thickness of the flat plate detector 1.

[0050] In some embodiments, a plurality of second threaded columns 124 are further provided on the flat plate structure 121, and the second threaded columns 124 are used to fix the third printed circuit board 133 to the flat plate structure 121 and support the third printed circuit board 133 on a side of the second printed circuit board 132 away from the flat plate structure 121, and the third printed circuit board 133 is also fixed to the bending portion 122.

[0051] For example, Figure 4 and Figure 5 As shown, the third printed circuit board 133 is fixed to the flat structure 121 and the bending portion 122 at the same time, wherein three second threaded columns 124 are provided on the flat structure 121, and the third printed circuit is supported on the side of the second printed circuit board 132 away from the flat structure 121 through the second threaded columns 124 and is fixed to the flat structure 121 of the middle frame 120 through the second threaded columns 124, wherein the height of the second threaded columns 124 is greater than the height of the first threaded columns 123, so that the third printed circuit board 133 is stacked on the second printed circuit board 132. Threaded holes 193 are also provided at the relative positions of the bending portion 122 and the third printed circuit board 133, and the fixing between the bending portion 122 and the third printed circuit board 133 can be achieved through corresponding connecting members such as fasteners such as bolts and nuts.

[0052] The embodiment of the present application does not limit the types of the first printed circuit board 131, the second printed circuit board 132, and the third printed circuit board 133. As an example, Figure 5 As shown, a chip 134 is disposed on the second printed circuit board 132, so the second printed circuit board 132 and the chip 134 can form the main control board of the flat panel detector 1 together. Accordingly, the first printed circuit board 131 can be a circuit board with other functions such as a signal board, and the third printed circuit board 133 can be a gate board.

[0053] In the above manner, multiple printed circuit boards of the flat panel detector 1 can be fixed on the middle frame 120 , and then other components that need to be fixed to the middle frame 120 , such as the lead plate 140 and the panel assembly 150 , can be assembled on the middle frame 120 in sequence.

[0054] In some embodiments, the flat panel detector 1 further includes a lead plate 140 , which is fixed to the outer surface of the flat panel structure 121 away from the bending portion 122 , and is used to block radiation from irradiating the multiple printed circuit boards.

[0055] For example, Figure 1 , Figure 2 and Figure 6 As shown, a lead plate 140 is arranged in the flat-panel detector 1, and threaded holes 192 are arranged at relative positions of the flat-panel structure 121 of the middle frame 120 and the edge area of ​​the lead plate 140. For example, threaded holes 192 can be arranged in three edge areas, and the lead plate 140 is fixed to the outer surface of the flat-panel structure 121 of the middle frame 120 by corresponding connecting parts such as bolts and nuts and other fasteners, which can effectively block the passage of rays such as X-rays, thereby preventing the rays from penetrating the panel assembly 150 and causing damage to the printed circuit board.

[0056] In some embodiments, the flat panel detector 1 also includes a panel assembly 150, which is disposed on a side of the lead plate 140 away from the middle frame 120. The panel assembly 150 includes a first sponge layer 151, a second sponge layer 152, and a detection panel 153 located between the first sponge layer 151 and the second sponge layer 152. A flexible printed circuit (FPC) 154 is disposed at an edge area of ​​the detection panel 153, and the flexible printed circuit 154 is bent to multiple printed circuit boards.

[0057] For example, Figure 1 , Figure 2 and Figure 7 As shown, a panel assembly 150 is provided in the flat panel detector 1. The panel assembly 150 is provided on one side of the outer surface of the flat plate structure 121 of the middle frame 120. The panel assembly 150 includes a detection panel 153. The detection panel 153 is coated with a first sponge layer 151 and a second sponge layer 152 on both sides. The first sponge layer 151 and the second sponge layer 152 have a buffering function, for example, so as to protect the detection panel 153. The detection panel 153 is connected to one end of a flexible circuit board 154 at its edge area, and the other end of the flexible circuit board 154 is bent to one side of the inner surface of the flat plate structure 121, so as to realize the electrical connection between the detection panel 153 and each connector. A gap for avoiding the flexible circuit board 154 is provided on the outer frame 110 to ensure that the flexible circuit board 154 can be bent and connected to the connector.

[0058] The detection panel 153 is also referred to as a panel, which includes a plurality of pixel units, which form a photosensitive pixel array and realize the conversion between optical signals and electrical signals together with the peripheral circuit module. As the main part of the flat panel detector 1, when the ray photons pass through the scintillator layer or the phosphor layer in the detection panel 153, they can be converted into visible light signals. The visible light signals are converted into electrical signals under the action of the photodiodes in the detection panel 153, and the electrical signals are read and output by the thin film transistors in the detection panel 153. The output electrical signals form digital signals after passing through the analog-to-digital converter. The photodiode is equivalent to a capacitor under negative bias. When irradiated by the light signal, free electrons can be generated, which is equivalent to the discharge of the capacitor, causing the voltage to drop. The readout integrated circuit (ROIC) is controlled by the thin film transistor to read the charge loss of each pixel in sequence and convert it into a grayscale image. In this way, the flat panel detector 1 can be used to image the target to be measured.

[0059] After the relevant components are fixed to the middle frame 120, the middle frame 120 can be assembled into the accommodation space of the outer frame 110. In some embodiments, such as Figure 3 and Figure 8 As shown, the flat plate structure 121 is fixed to the edge of the outer frame 110 through a connecting member, and a step 112 is provided at a position corresponding to the bent portion 122 on the outer frame 110. When the middle frame 120 is accommodated in the accommodation space of the outer frame 110, the step 112 abuts against the bent portion 122 of the middle frame 120, and the middle frame 120 can be limited. The outer frame 110 is provided with a threaded hole 194, and the flat plate structure 121 of the middle frame 120 and the outer frame 110 can be connected by corresponding connecting members such as bolts and nuts, so that the middle frame 120 and the outer frame 110 are fixed.

[0060] In some embodiments, Figure 8 As shown, the flat panel detector 1 also includes a metal heat sink 160, which can be, for example, a copper plate, etc. The edge of the outer frame 110 is provided with a groove, and the end of the metal heat sink 160 can be snapped and fixed in the groove. Furthermore, the end of the metal heat sink 160 can be fixed in the groove through a connector, and the metal heat sink 160 is arranged in contact with the chip 134, so that the chip 134 can be effectively cooled by the metal heat sink 160.

[0061] In some embodiments, the receiving space formed by the outer frame 110 is further provided with circuit boards such as a power board, a video graphics array (VGA) board, and an indicator light board. The power board, the video graphics array board, and the indicator light board can be fixed to the side wall 111 of the outer frame 110. For example, Figure 8 As shown, the flat panel detector 1 has a VGA interface 201, a power interface 202, an indicator light 203, a network cable interface 204, etc., which are respectively connected to the VGA board, power board, indicator light board, network cable, etc. set in the outer frame 110, so as to realize related functions and ensure the normal operation of the flat panel detector 1.

[0062] In other implementations, the outer frame 110 is also provided with a hard-pull adhesive for limiting the position around it, and the four corners of the outer frame are also provided with anti-collision foam, wherein the hard-pull adhesive can be arranged in a groove at the edge of the outer frame 110 for fixing. Figure 2 As shown, waterproof rings 205 are also provided around the two surfaces of the outer frame 110. The waterproof rings 205 can be fixed in the grooves on the two surfaces of the outer frame 110. The grooves surround the inner side of the side wall 111 and have a certain depth, such as 1.5 mm. In addition, other grooves and threaded holes can be provided on the outer frame 110 to facilitate fixing the printed circuit board of the external device.

[0063] After the above assembly is completed, the flat panel detector 1 needs to be assembled with an upper cover and a lower cover to form a closed structure and obtain a complete overall structure.

[0064] In some embodiments, the flat panel detector 1 further includes a carbon fiber plate 170, which is fixed to the outer frame 110 and covers the opening of the outer frame 110 toward the outer surface of the flat panel structure 121. Fig. 9 As shown, the carbon fiber plate 170 can be fixed on the outer frame 110 as an upper cover of the flat panel detector 1, covering the opening formed by the outer frame 110 from above, thereby closing the middle frame assembly formed by the middle frame 120 and the printed circuit board.

[0065] Threaded holes, such as five M2 threaded holes, may be provided at corresponding positions on the edges of the outer frame 110 and the carbon fiber plate 170, so that the carbon fiber plate 170 can be fixed to the outer frame 110 through corresponding fasteners such as bolts and nuts. A frame line 171 may also be provided on the carbon fiber plate 170 to play an alignment role during the assembly process between the outer frame 110.

[0066] In some embodiments, the flat panel detector 1 further includes a metal cover plate 180, such as an aluminum alloy cover plate, which is fixed to the outer frame 110 and covers the opening of the outer frame 110 facing the inner surface of the flat panel structure 121. Fig.10 As shown, the metal cover plate 180 can be fixed on the outer frame 110 as the lower cover of the flat panel detector 1, covering the opening formed by the outer frame 110 from below, thereby closing the middle frame assembly formed by the middle frame 120 and the printed circuit board.

[0067] Threaded holes may be provided at corresponding positions of the edges of the outer frame 110 and the metal cover plate 180 , so that the metal cover plate 180 can be fixed to the outer frame 110 by corresponding connecting members such as fasteners such as bolts and nuts.

[0068] In addition, other threaded holes may be provided on the outer frame 110, for example, four M4 threaded holes may be provided for connecting to the ground or fixing to the device.

[0069] Based on the above description, the flat-panel detector 1 of the embodiment of the present application fixes the printed circuit board through the "U"-shaped middle frame 120, and at the same time, a lead plate 140, a panel assembly 150, etc. are arranged on the middle frame 120 to form a middle frame assembly. After the middle frame assembly is assembled with the outer frame 110, a metal heat sink 160 is arranged on the outer frame 110 to dissipate heat from the chip on the printed circuit board. Finally, the outer frame 110 is covered with a carbon fiber plate 170 and a metal cover plate 180 to form a complete machine structure, so that the flat-panel detector 1 has good structural performance and ensures its detection performance.

[0070] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0071] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A flat panel detector, characterized in that: The flat panel detector comprises: An outer frame, comprising side walls, wherein the side walls surround and form a receiving space; a middle frame, disposed in the accommodation space, the middle frame comprising a flat plate structure and a bending portion formed by bending along an edge of the flat plate structure to form a bending space in a direction perpendicular to the flat plate structure; and A plurality of printed circuit boards are provided, wherein the plurality of printed circuit boards include a first printed circuit board and a second printed circuit board, and the first printed circuit board and the second printed circuit board are accommodated in the bending space.

2. The flat panel detector according to claim 1, characterized in that: The first printed circuit board is fixed to the inner surface of the flat structure on the side facing the bending portion, and a plurality of first threaded columns are provided on the flat structure. The first threaded columns are used to fix the second printed circuit board to the flat structure and support the second printed circuit board on a side of the first printed circuit board away from the flat structure.

3. The flat panel detector according to claim 2, characterized in that: The flat panel detector also includes a third printed circuit board, which is fixed to the bending portion and the flat panel structure at the same time. The flat panel structure is also provided with a plurality of second threaded columns, which are used to fix the third printed circuit board to the flat panel structure and support the third printed circuit board on a side of the second printed circuit board away from the flat panel structure.

4. The flat panel detector according to any one of claims 1 to 3, characterized in that: The second printed circuit board is provided with a chip, the edge of the outer frame is provided with a groove, and the flat panel detector further includes: A metal heat sink, the end of which is clamped and fixed in the groove, and the metal heat sink is arranged in contact with the chip, and the metal heat sink is used to dissipate heat from the chip.

5. The flat panel detector according to any one of claims 1 to 3, characterized in that: The flat plate structure is fixed to the edge of the outer frame through a connecting piece, and a step is arranged at a position on the outer frame corresponding to the bent portion, and the step abuts against the bent portion.

6. The flat panel detector according to any one of claims 1 to 3, characterized in that: The flat panel detector also includes: A lead plate is fixed to the outer surface of the flat structure on a side away from the bending portion, and the lead plate is used to block radiation from irradiating the multiple printed circuit boards.

7. The flat panel detector according to claim 6, characterized in that: The flat panel detector also includes: A panel assembly, wherein the panel assembly is arranged on a side of the lead plate away from the middle frame, the panel assembly includes a first sponge layer, a second sponge layer, and a detection panel arranged between the first sponge layer and the second sponge layer, the detection panel includes a plurality of pixel units, a flexible circuit board is arranged at an edge area of ​​the detection panel, and the flexible circuit board is bent to the plurality of printed circuit boards.

8. The flat panel detector according to any one of claims 1 to 3, characterized in that: The flat panel detector also includes: The carbon fiber plate is fixed to the outer frame and covers the opening of the outer frame toward the outer surface of the flat plate structure.

9. The flat panel detector according to any one of claims 1 to 3, characterized in that: The flat panel detector also includes: The metal cover plate is fixed to the outer frame and covers the opening of the outer frame toward the inner surface of the flat plate structure.

10. The flat panel detector according to any one of claims 1 to 3, characterized in that: A power board, a video graphics array board, and an indicator light board are also arranged in the accommodation space. The power board, the video graphics array board, and the indicator light board are fixed to the side wall.

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