Radiation imaging device

Abstract

A radiation imaging device according to one embodiment of the present invention comprises: a detection panel that detects radiation; a support member that supports the detection panel, the support member having a first portion extending along a plane orthogonal to a first direction orthogonal to the detection panel, and a second portion extending from the first portion along the first direction and formed integrally with the first portion; a wiring board to which a signal read out by the detection panel is input from the detection panel; and a housing that accommodates the detection panel, the support member, and the wiring board, and that has side wall members extending along the first direction. The support member is fixed to the housing by screwing the second portion and the side wall members, and the length along the first direction of the second portion is greater than the thickness along the first direction of the first portion.

Description

Radiation imaging device

[0001] The present disclosure relates to a radiation imaging apparatus.

[0002] There is known a radiation imaging device (radiation detection device) that includes a detection panel (radiation detection panel), a support member that supports the detection panel, a wiring board (circuit board) that processes electrical signals output from the detection panel, and a housing that houses the detection panel, the support member, and the wiring board (see, for example, Patent Document 1). In the radiation imaging device described above, the support member is fixed to the housing via a spacer.

[0003] Japanese Patent Application Laid-Open No. 2019-113401

[0004] In the radiation imaging device described above, it is desirable to reduce the weight of the radiation imaging device. While it is conceivable to reduce the thickness of the support member in order to reduce the weight of the radiation imaging device, this may result in a decrease in the strength of the radiation imaging device. While it is conceivable to fix the support member to the housing in order to prevent a decrease in the strength of the radiation imaging device, as described above, reducing the thickness of the support member in order to reduce the weight of the radiation imaging device may result in a problem in that it becomes difficult to fix the support member to the housing.

[0005] An object of one aspect of the present disclosure is to provide a radiation imaging apparatus that can achieve both weight reduction and suppression of a decrease in strength.

[0006] The present disclosure includes radiation imaging devices according to [1] to

[13] .

[0007] [1] A radiation imaging device comprising: a detection panel that detects radiation; a support member that supports the detection panel, the support member having a first portion extending along a plane perpendicular to a first direction that is perpendicular to the detection panel, and a second portion extending from the first portion along the first direction and formed integrally with the first portion; a wiring board to which a signal read out by the detection panel is input from the detection panel; and a housing that houses the detection panel, the support member, and the wiring board and has sidewall members that extend along the first direction, wherein the support member is fixed to the housing by screwing the second portion and the sidewall members together, and wherein the length of the second portion along the first direction is longer than the thickness of the first portion along the first direction.

[0008] In the radiation imaging device of [1] above, the support member has a first portion extending along a plane perpendicular to the first direction, and a second portion extending along the first direction longer than the thickness of the first portion. This allows the weight of the support member to be reduced by thinning the first portion while suppressing a decrease in the strength of the support member. Furthermore, by screwing the second portion, which has a length longer than the thickness of the first portion, to the sidewall member of the housing, the support member can be stably fixed to the housing. Therefore, the configuration of [1] above allows for both a reduction in the weight of the radiation imaging device and suppression of a decrease in the strength of the radiation imaging device.

[0009] [2] The radiation imaging device of [1], wherein the thickness of the first portion along the first direction is 3 mm or less.

[0010] According to the configuration [2] above, the weight of the support member can be effectively reduced, and as a result, the weight of the radiation imaging device can be effectively reduced.

[0011] [3] The radiation imaging device of [1] or [2], wherein the length of the second portion along the first direction is 9 mm or more.

[0012] According to the configuration [3] above, the length of the second portion can be made sufficiently long (the length of the second portion for screw fastening can be ensured sufficiently), so that the second portion of the support member and the side wall member of the housing can be more reliably screw fastened together, thereby more stably fixing the support member to the housing.

[0013] [4] A radiation imaging device according to any one of [1] to [3], wherein the length of the second portion along the first direction is at least three times the thickness of the first portion along the first direction.

[0014] According to the configuration [4] above, the length of the second portion can be made sufficiently long (the length of the second portion for screw fastening can be ensured sufficiently), so that the second portion of the support member and the side wall member of the housing can be more reliably screw fastened together with the screws, thereby more stably fixing the support member to the housing.

[0015] [5] The radiation imaging device according to any one of [1] to [4], wherein the second portion extends from an end of the first portion along the first direction.

[0016] According to the configuration [5] above, for example, by bending (bending) a flat plate-shaped member, the second portion can be easily formed integrally with the first portion.

[0017] [6] The radiation imaging device according to any one of [1] to [5], wherein the housing further has a lid portion and a bottom portion that face each other in the first direction and are connected to each other by the side wall member, and the lid portion, the side wall member, and the bottom portion are each formed as separate bodies.

[0018] According to the configuration [6] above, when manufacturing the radiation imaging device, the second part of the support member can be screwed to the side wall member with the lid and bottom removed from the side wall member, making it possible to easily fix the support member to the housing.

[0019] [7] A radiation imaging device according to any one of [1] to [6], wherein the side wall member has a first side wall portion extending along a second direction perpendicular to the first direction, and the support member is fixed to the housing by screwing the second portion and the first side wall portion together at two or more locations.

[0020] According to the configuration [7] above, the second portion and the first side wall portion are screwed together at two or more locations, so that the support member can be fixed to the housing more stably.

[0021] [8] A radiation imaging device according to any one of [1] to [7], wherein the side wall member has a first side wall portion extending along a second direction perpendicular to the first direction, and a second side wall portion extending along a third direction perpendicular to the first direction and intersecting the second direction, and connected to the first side wall portion; the second portion has a first fixing portion facing the first side wall portion and a second fixing portion facing the second side wall portion; and the support member is fixed to the housing by screwing the first fixing portion and the first side wall portion together and screwing the second fixing portion and the second side wall portion together.

[0022] According to the configuration [8] above, the first fixing portion and the first side wall portion are screwed together, and the second fixing portion and the second side wall portion are screwed together, so that the support member can be more stably fixed to the housing.

[0023] [9] A radiation imaging device according to [8], wherein the side wall member further has a third side wall portion connected to the first side wall portion so as to face the second side wall portion, and a fourth side wall portion connected to the second side wall portion and the third side wall portion so as to face the first side wall portion, and the support member is screwed to a corner portion of the side wall member formed by the third side wall portion and the fourth side wall portion.

[0024] According to the configuration [9] above, the support member is screwed not only to the first side wall portion and the second side wall portion, but also to the corner portion of the side wall member formed by the third side wall portion and the fourth side wall portion (the corner portion diagonally opposite to the corner portion formed by the first side wall portion and the second side wall portion), so that the support member can be fixed to the housing even more stably.

[0025]

[10] The radiation imaging device according to [9], further comprising a bracket formed separately from the housing and the support member, wherein the support member is screwed to the corner portion of the side wall member via the bracket.

[0026] According to the configuration

[10] above, even if there is a dimensional tolerance between the support member and the housing, the dimensional error can be absorbed by using a bracket formed separately from the housing and the support member, and the support member can be properly fixed to the housing.

[0027]

[11] The radiation imaging device of any of [1] to

[10] , wherein the sidewall member has a first sidewall portion extending along a second direction perpendicular to the first direction, a second sidewall portion extending along a third direction perpendicular to the first direction and intersecting the second direction and connected to the first sidewall portion, a third sidewall portion connected to the first sidewall portion so as to face the second sidewall portion, and a fourth sidewall portion connected to the second sidewall portion and the third sidewall portion so as to face the first sidewall portion, wherein a first corner portion of the sidewall member is formed by the second sidewall portion and the fourth sidewall portion, and a second corner portion of the sidewall member is formed by the third sidewall portion and the fourth sidewall portion, and the support member is fixed to the housing by screwing the second portion and the first sidewall portion together and by screwing the first corner portion and the second corner portion together with the support member.

[0028] According to the configuration

[11] above, the support member is screwed not only to the first side wall portion, but also to a first corner portion of the side wall member formed by the second side wall portion and the fourth side wall portion (a corner portion diagonal to the corner formed by the first side wall portion and the third side wall portion) and a second corner portion of the side wall member formed by the third side wall portion and the fourth side wall portion (a corner portion diagonal to the corner formed by the first side wall portion and the second side wall portion), so that the support member can be fixed to the housing even more stably.

[0029]

[12] A radiation imaging device according to any one of [8] to

[10] , wherein the side wall member further has a third side wall portion connected to the first side wall portion so as to face the second side wall portion, and a fourth side wall portion connected to the second side wall portion and the third side wall portion so as to face the first side wall portion, and the support member further has a third portion extending along the first direction from at least one of a first end of the first portion facing the fourth side wall portion and a second end of the first portion facing the third side wall portion, and formed integrally with the first portion.

[0030] According to the configuration

[12] above, since the support member has the third portion, it is possible to more effectively prevent the strength of the support member from decreasing.

[0031]

[13] A radiation imaging device according to

[12] , further comprising a flexible connecting member connecting the detection panel and the wiring board, wherein the first portion has a support surface facing the detection panel and a back surface opposite the support surface, the wiring board is positioned facing the back surface, the length of the third portion along the first direction is shorter than the length of the second portion along the first direction, and when viewed from the first direction, the flexible connecting member passes along the side of the third portion.

[0032] According to the configuration

[13] above, the length of the third portion along the first direction is shorter than the length of the second portion along the first direction, so that the flexible connecting member can be easily routed to the side of the third portion without coming into contact with the third portion.

[0033] According to one aspect of the present disclosure, it is possible to provide a radiation imaging apparatus that can achieve both weight reduction and suppression of a decrease in strength.

[0034] FIG. 1 is a perspective view of a radiation imaging device according to a first embodiment. FIG. 2 is an exploded perspective view of the radiation imaging device. FIG. 3 is a perspective view of a sidewall member. FIG. 4 is a bottom view of a housing. FIG. 5 is a perspective view of a support member. FIG. 6 is a cross-sectional view of the radiation imaging device taken along line VI-VI in FIG. 1. FIG. 7 is a bottom view of the radiation imaging device. FIG. 8 is a cross-sectional view of the radiation imaging device taken along line VIII-VIII in FIG. 7. FIG. 9 is a cross-sectional view of the radiation imaging device taken along line IX-IX in FIG. 7. FIG. 10(a) is a top view of a first wiring substrate, and FIG. 10(b) is a bottom view of the first wiring substrate. FIG. 11 is an enlarged cross-sectional view of a portion of the radiation imaging device. FIG. 12 is a cross-sectional view of a radiation imaging device according to a second embodiment. FIG. 13 is a cross-sectional view of a radiation imaging device according to a third embodiment. FIGS. 14(a), 14(b), and 14(c) are schematic diagrams showing modified arrangements of the first wiring substrate and the second wiring substrate.

[0035] An embodiment of the present disclosure will be described in detail below with reference to the drawings. In the following description, identical or equivalent elements will be designated by the same reference numerals, and duplicate descriptions will be omitted. Also, in the drawings, some features of the embodiment are exaggerated to make them easier to understand. Therefore, the dimensional ratios of the various parts in the drawings may differ from the actual dimensional ratios.

[0036] [First Embodiment] The configuration of a radiation imaging device 1 according to a first embodiment will be described with reference to Figures 1 to 9. The radiation imaging device 1 is a large-area flat panel sensor (X-ray imaging device) used, for example, in a medical X-ray imaging system. As shown in Figures 1 and 2, the radiation imaging device 1 includes a housing 2, a detection panel 3, a support member 4, a bracket 5, a first wiring board 6 (wiring board), a second wiring board 7, a protective film 8, a plurality of (four in this embodiment) nuts 9 (see Figure 6), a plurality of (twelve in this embodiment) first flexible connecting members 10 (flexible connecting members), a plurality of (five in this embodiment) second flexible connecting members 11, and a third flexible connecting member 12.

[0037] (Housing) The housing 2 is a hollow container having a substantially rectangular parallelepiped outer shape. The housing 2 houses the components of the radiation imaging device 1 described above. As shown in FIGS. 1 and 2 , the housing 2 includes a lid 21, a sidewall member 22, and a bottom 23. The lid 21, the sidewall member 22, and the bottom 23 are formed as separate bodies. The lid 21 and the bottom 23 are disposed facing each other at a distance. In this specification, the direction in which the lid 21 and the bottom 23 face each other (a direction perpendicular to the detection panel 3) is referred to as the Z-axis direction (first direction). The direction perpendicular to the Z-axis direction (in this embodiment, the short-side direction of the radiation imaging device 1 when viewed from the Z-axis direction) is referred to as the X-axis direction (third direction), and the direction perpendicular to the Z-axis direction and the X-axis direction (in this embodiment, the long-side direction of the radiation imaging device 1 when viewed from the Z-axis direction) is referred to as the Y-axis direction (second direction). The radiation imaging device 1 is disposed so that radiation to be detected (X-rays in this embodiment) is incident along the Z-axis direction on the lid portion 21. The radiation passes through the lid portion 21 and enters the detection panel 3, whereby the radiation is detected by the radiation imaging device 1.

[0038] The lid 21 is a rectangular plate member. The lid 21 is formed, for example, from a material that transmits radiation (e.g., carbon fiber, etc.). The lid 21 guides radiation that is incident along the Z-axis direction to the inside of the housing 2. The lid 21 is fixed to the upper surface 22e (the upper surface in FIG. 2 ) of the side wall member 22, for example, by screws, etc.

[0039] The sidewall member 22 is a rectangular, annular plate member. The sidewall member 22 extends along the Z-axis direction and connects the lid portion 21 and the bottom portion 23 to each other. The sidewall member 22 is formed, for example, from a metal material that shields radiation (e.g., iron, aluminum, stainless steel, etc.). The sidewall member 22 is formed, for example, by performing a laser punching process on a plate member. As in the present embodiment, by manufacturing the sidewall member 22 by laser punching and manufacturing the sidewall member 22 and the bottom portion 23 separately, the manufacturing cost of the case composed of the sidewall member 22 and the bottom portion 23 can be reduced compared to when a case in which the sidewall member 22 and the bottom portion 23 are integrated together is manufactured by cutting.

[0040] As shown in FIG. 3 , the side wall member 22 has side wall portions 221 to 224. The side wall portion 221 (first side wall portion) extends along both the Y-axis direction and the Z-axis direction and is a rectangular plate member elongated in the Y-axis direction. The side wall portion 222 (second side wall portion) extends along both the X-axis direction and the Z-axis direction and is a rectangular plate member elongated in the X-axis direction. The side wall portion 222 is connected to the side wall portion 221. The side wall portion 223 (third side wall portion) extends along both the X-axis direction and the Z-axis direction and is a rectangular plate member elongated in the X-axis direction. The side wall portion 223 is connected to the side wall portion 221 so as to face the side wall portion 222 along the Y-axis direction. The side wall portion 224 (fourth side wall portion) extends along both the Y-axis direction and the Z-axis direction and is a rectangular plate member elongated in the Y-axis direction. The side wall portion 224 is connected to the side wall portions 222 and 223 so as to face the side wall portion 221 along the X-axis direction.

[0041] The sidewall member 22 has four corners 22a to 22d. Each of the corners 22a to 22d corresponds to one of the four corners of the sidewall member 22 when viewed from the Z-axis direction (i.e., a portion near one of the four corners). When viewed from the Z-axis direction, each of the corners 22a to 22d is formed into a substantially L-shape by two portions extending in directions perpendicular to each other.

[0042] The corner 22 a is formed by the side wall portions 221 and 222, and extends along both the X-axis direction and the Y-axis direction. That is, the corner 22 a is formed by a portion 22 a 1 of the side wall portion 221 and a portion 22 a 2 of the side wall portion 222, which are included in the vicinity of the connection portion between the side wall portions 221 and 222.

[0043] Corner 22b (first corner) is formed by side wall portions 222 and 224, and extends along both the X-axis direction and the Y-axis direction. That is, corner 22b is formed by portion 22b1 of side wall portion 222 and portion 22b2 of side wall portion 224, which are included in the vicinity of the connection between side wall portions 222 and 224.

[0044] Corner 22c (second corner) is formed by side wall portions 223 and 224, and extends along both the X-axis direction and the Y-axis direction. That is, corner 22c is formed by portion 22c1 of side wall portion 223 and portion 22c2 of side wall portion 224, which are included in the vicinity of the connection between side wall portions 223 and 224. Corner 22c is a corner that is diagonally opposite corner 22a.

[0045] Corner 22d is formed by side wall portions 221 and 223, and extends along both the X-axis direction and the Y-axis direction. That is, corner 22d is formed by portion 22d1 of side wall portion 221 and portion 22d2 of side wall portion 223, which are included in the vicinity of the connection between side wall portions 221 and 223. Corner 22d is a corner diagonally opposite corner 22b.

[0046] Two through holes 221a are provided in the side wall portion 221. The two through holes 221a are provided in a portion 22d1 of the side wall portion 221 that is included in the corner portion 22d, and in an approximate center portion of the side wall portion 221 in the Y-axis direction (in this embodiment, a position slightly shifted toward the corner portion 22a from the approximate center portion).

[0047] Two through holes 222a are provided in the side wall portion 222. The two through holes 222a are provided in a portion 22a2 of the side wall portion 222 included in the corner portion 22a, and a portion 22b1 of the side wall portion 222 included in the corner portion 22b.

[0048] One through-hole 223a is provided in the side wall portion 223. The through-hole 223a is provided in a portion 22c1 of the side wall portion 223 that is included in the corner portion 22c.

[0049] One through-hole 224a is provided in the side wall portion 224. The through-hole 224a is provided in a portion 22c2 of the side wall portion 224 that is included in the corner portion 22c. The two through-holes 221a and the two through-holes 222a are arranged in a balanced manner in the circumferential direction of the side wall member 22 when viewed from the Z-axis direction.

[0050] As shown in FIG. 3 , the side wall 223 has a thin portion 223b and a thick portion 223c other than the thin portion 223b that is thicker than the thin portion 223b. In this embodiment, the thin portion 223b is provided between the center of the side wall 223 and the corner 22c in the Y-axis direction. As an example, the thin portion 223b is formed by cutting out a substantially rectangular parallelepiped shape such that the inner portion of the side wall 223 (thick portion 223c) in the Y-axis direction opens to one end of the side wall 223 in the Z-axis direction (in this embodiment, the bottom surface 22f opposite the top surface 22e). In other words, the shape of the thin portion 223b when viewed in the Y-axis direction is rectangular, and the thin portion 223b does not reach the top surface 22e.

[0051] The thin-walled portion 223b has openings 223d and 223e for exposing connectors 61 and 62 (described later) to the outside of the housing 2, and three openings 223f for exposing an LED indicator (not shown) (described later) to the outside of the housing 2. The opening 223d is located on one side in the X-axis direction (the side toward the corner 22c), and the opening 223e is located on the other side in the X-axis direction. The three openings 223f are lined up along the X-axis direction between the openings 223d and 223e. The length of the thin-walled portion 223b along the X-axis direction is slightly longer than the length of the first wiring board 6 along the X-axis direction. In other words, the dimension of the thin-walled portion 223b along the X-axis direction is set to a length that allows a portion of the first wiring board 6 (a portion of a protrusion 44 (described later)) to fit into a space SP inside the thin-walled portion 223b.

[0052] The bottom 23 is a rectangular plate member. The bottom 23 is formed, for example, from a metal material (e.g., iron, aluminum, stainless steel, etc.) that shields against radiation. The bottom 23 is screwed to the bottom surface 22f of the sidewall member 22. As shown in FIG. 4 , the bottom 23 has a plurality of (six in this embodiment) through holes 23a and a plurality of (five in this embodiment) through holes 23b. The six through holes 23a are provided at three locations aligned along the X-axis direction on the sidewall 223 side of the center of the bottom 23 in the Y-axis direction, and at three locations aligned along the X-axis direction on the sidewall 222 side of the center of the bottom 23 in the Y-axis direction. The five through holes 23b are provided at four locations near each of the corners 22a to 22d and one location approximately in the center of the bottom 23 when viewed from the Z-axis direction.

[0053] (Detection Panel) As shown in FIG. 2 , the detection panel 3 includes a sensor substrate 31 and a scintillator 32. The sensor substrate 31 is a rectangular substrate, such as a glass substrate. The sensor substrate 31 has a first surface 31a facing the lid portion 21 along the Z-axis direction and a second surface 31b opposite the first surface 31a. The sensor substrate 31 is fixed to the support member 4 so that the second surface 31b faces the support surface 41a of the support member 4. The second surface 31b is fixed to the support surface 41a via an adhesive member such as double-sided tape. Pixels including photoelectric conversion elements and switching elements are formed on the sensor substrate 31, and the pixels function as light receiving units 33 (see FIGS. 8 and 9 ). The photoelectric conversion elements in the pixels are formed of amorphous silicon (a-Si) or the like. The switching elements in the pixels are formed of thin-film transistors (TFTs) or the like. The scintillator 32 is formed on the light receiving unit 33 by vapor deposition or the like. The scintillator 32 is formed of a scintillator material containing, for example, CsI as a main component. The scintillator 32 converts radiation incident into the housing 2 into light and outputs the light toward the light receiving unit 33. The light received by the light receiving unit 33 is converted into an electrical signal and transmitted to the sensor substrate 31 via wiring or the like (not shown).

[0054] The light receiving unit 33 is provided with a drive line for turning on the switch element. On the first surface 31a of the sensor substrate 31, a plurality of electrode pads (not shown) are arranged along the X-axis direction near an end 31c on one side (the side wall portion 223 side) of the sensor substrate 31 in the Y-axis direction. Each of the plurality of electrode pads is connected to the drive line. Each of the plurality of electrode pads is connected to the second wiring substrate 7 via the second flexible connecting member 11, and supplies a signal from the second wiring substrate 7 to the drive line.

[0055] The light receiving unit 33 is provided with signal lines for reading out the charges accumulated in the photoelectric conversion elements as signals. When each switch element in the light receiving unit 33 is turned ON by a signal from the drive line, the charges flow out to each signal line. On the first surface 31a of the sensor substrate 31, a plurality of electrode pads (not shown) are arranged along the Y-axis direction near an end 31d on one side (the side wall portion 224 side) of the sensor substrate 31 in the X-axis direction. Each of the plurality of electrode pads is connected to the signal lines. Each of the plurality of electrode pads is connected to the first wiring board 6 via the first flexible connecting member 10 and supplies the signal to the first wiring board 6.

[0056] (Support Member) The support member 4 is a member that supports the detection panel 3, the first wiring board 6, the second wiring board 7, etc., relative to the housing 2. As shown in FIGS. 5 and 6 , the support member 4 has a flat plate portion 41 (first portion), a side wall portion 42 (second portion), a side wall portion 43 (third portion), a protrusion 44, a plurality of pins 45 (six in this embodiment), a plurality of pins 46 (five in this embodiment), a plurality of pins 47 (seven in this embodiment), and a plurality of studs 48 (four in this embodiment). Each of the above-mentioned components that make up the support member 4 is formed, for example, from a metal material that shields against radiation (e.g., iron, aluminum, stainless steel, etc.). In this embodiment, as an example, each of the above-mentioned components that make up the support member 4 is formed from stainless steel.

[0057] The flat plate portion 41 is a rectangular plate-shaped portion extending along the XY plane perpendicular to the Z-axis direction. The flat plate portion 41 has a support surface 41a that supports the detection panel 3 and a back surface 41b opposite the support surface 41a. The support surface 41a faces the lid portion 21. The back surface 41b faces the bottom portion 23. The support surface 41a supports the sensor board 31 of the detection panel 3. The flat plate portion 41 has end portions 41c to 41f. The end portion 41c extends along the Y-axis direction and faces the side wall portion 221 in the X-axis direction. The end portion 41d extends along the X-axis direction and faces the side wall portion 222 in the Y-axis direction. The end portion 41e (second end portion) extends along the X-axis direction and faces the side wall portion 223 in the Y-axis direction. The end 41f (first end) extends along the Y-axis direction and faces the side wall portion 224 in the X-axis direction.

[0058] The side wall portion 42 is a portion that extends from the flat plate portion 41 along the Z-axis direction and is formed integrally with the flat plate portion 41. The side wall portion 42 has a wall portion 421 (first fixing portion) and a wall portion 422 (second fixing portion).

[0059] The wall portion 421 extends from the end portion 41c along the Z-axis direction toward the bottom portion 23 (see FIG. 2 ). The wall portion 421 extends from the entire end portion 41c. When viewed from the X-axis direction, the wall portion 421 has a rectangular shape that is elongated in the Y-axis direction. The wall portion 421 faces the side wall portion 221 in the X-axis direction. Two screw holes 421a are provided in the wall portion 421. The two screw holes 421a are provided at positions corresponding to the two through holes 221a in the side wall portion 221. Specifically, the two screw holes 421a are provided at one location on one side of the wall portion 421 in the Y-axis direction (the end portion 41e side), and at one location slightly shifted toward the end portion 41d from approximately the center of the wall portion 421 in the Y-axis direction.

[0060] The wall portion 422 extends from the end portion 41d along the Z-axis direction toward the bottom portion 23 (see FIG. 2 ). The wall portion 422 extends from the entire end portion 41d. When viewed from the Y-axis direction, the wall portion 422 has a rectangular shape that is elongated in the X-axis direction. A recess 422b that is recessed toward the back surface 41b in the Z-axis direction is formed in a portion of the wall portion 422. The wall portion 422 faces the side wall portion 222 in the Y-axis direction. Two screw holes 422a are provided in the wall portion 422. The two screw holes 422a are provided at positions corresponding to the two through holes 222a in the side wall portion 222. Specifically, the two screw holes 422a are located at one location on one side of the wall portion 422 in the X-axis direction (the end portion 41f side) and one location on the other side of the wall portion 422 in the X-axis direction (the end portion 41c side).

[0061] The support member 4 is fixed to the housing 2 by screwing the side wall portion 42 and the side wall member 22 together. As shown in FIG. 6 , in this embodiment, the wall portion 421 and the side wall portion 221 are screwed together at two locations, and the wall portion 422 and the side wall portion 222 are screwed together at two locations. More specifically, the shanks of two screws S1 are inserted into the through holes 221a and screwed into the screw holes 421a, thereby fixing the wall portion 421 and the side wall portion 221 to each other. Furthermore, the shanks of two screws S2 are inserted into the through holes 222a and screwed into the screw holes 422a, thereby fixing the wall portion 422 and the side wall portion 222 to each other.

[0062] The side wall portion 43 is a portion formed integrally with the flat plate portion 41. The side wall portion 43 extends from the end portion 41f along the Z-axis direction toward the bottom portion 23 (see FIG. 2). The side wall portion 43 extends from the entire end portion 41f. When viewed from the X-axis direction, the side wall portion 43 has a rectangular shape that is elongated in the Y-axis direction. The side wall portion 43 faces the side wall portion 224 in the X-axis direction.

[0063] The side wall portion 42 (wall portions 421, 422) and the side wall portion 43 are formed by bending (three-side bending) an originally flat plate member. Specifically, the side wall portion 42 (wall portions 421, 422) and the side wall portion 43 are formed by bending a portion (including an end portion) of the plate member along the Z-axis direction. However, the side wall portions 42, 43 may be formed by a method other than bending. For example, the rectangular plate-shaped side wall portions 42, 43 prepared as separate members from the flat plate portion 41 may be welded to the end portions 41c, 41d, and 41f of the plate member (flat plate portion 41). This method also allows for the production of a support member 4 in which the flat plate portion 41 and the side wall portions 42, 43 are integrally formed.

[0064] The protruding portion 44 is a portion formed integrally with the flat plate portion 41. The protruding portion 44 is formed in a substantially rectangular plate shape extending along the same plane as the flat plate portion 41. A screw hole 44a penetrating in the Z-axis direction is provided in the approximate center of the protruding portion 44. The protruding portion 44 is provided so as to protrude outward from the corner between the end portions 41f and 41e of the flat plate portion 41. In other words, the protruding portion 44 protrudes from the corner of the flat plate portion 41 facing the corner portion 22c of the side wall member 22 toward the corner portion 22c. The protruding portion 44 is spaced apart from the corner portion 22c when the support member 4 is fixed to the housing 2.

[0065] Each of the pins 45, 46, and 47 is a cylindrical member erected on the rear surface 41 b, and has a threaded inner surface. As an example, each of the pins 45, 46, and 47 is formed by being press-fitted into a through-hole pre-formed in the flat plate portion 41, and extends from the rear surface 41 b toward the bottom portion 23 along the Z-axis direction.

[0066] Each of the multiple pins 45 is a member for fixing the support member 4 and the housing 2 (bottom 23) to each other. Each pin 45 is provided at a position corresponding to a corresponding through hole 23a (see FIG. 4 ) provided in the bottom 23. Specifically, the six pins 45 are provided at three locations aligned along the X-axis direction on the end 41e side of the flat plate portion 41 relative to the center in the Y-axis direction, and at three locations aligned along the X-axis direction on the end 41d side of the flat plate portion 41 relative to the center in the Y-axis direction. The shank of a screw (not shown) is inserted into the through hole 23a provided in the bottom 23 and threaded into the thread groove of the pin 45, thereby fixing the flat plate portion 41 of the support member 4 to the bottom 23 of the housing 2.

[0067] Each of the pins 46 is a member for fixing the support member 4 to an external member (not shown) disposed outside the housing 2 (bottom 23). The external member is a member for supporting (fixing), for example, the radiation imaging device 1. Each pin 46 is provided at a position corresponding to a respective through-hole 23b (see FIG. 4 ) provided in the bottom 23. Specifically, the five pins 46 are provided at four locations near each of the four corners of the flat plate portion 41 when viewed from the Z-axis direction, and at one location approximately in the center of the back surface 41b. The shank of a screw (not shown) is inserted sequentially through the external member (e.g., a through-hole provided in the external member) and the through-hole 23b provided in the bottom 23, and is threaded into the thread groove of the pin 46, thereby fixing the flat plate portion 41 of the support member 4 to the external member. This fixes the radiation imaging device 1 to the external member.

[0068] Each of the multiple pins 47 is a member for fixing the support member 4 and the first wiring board 6 to each other. When viewed from the Z-axis direction, the seven pins 47 are lined up along the Y-axis direction, closer to the end 41 f than the center of the flat plate portion 41 in the X-axis direction. The height from the back surface 41 b along the Z-axis direction to the top of each pin 47 is lower than the height from the back surface 41 b along the Z-axis direction to the tops of the pins 45 and 46.

[0069] Each of the multiple studs 48 is a cylindrical member for fixing the support member 4 and the second wiring board 7 to each other. The studs 48 are erected on the back surface 41b and have a surface on which a thread groove is formed. In this embodiment, the four studs 48 are formed by being press-fitted into four through holes 41g (see FIG. 8 ) provided in advance in the flat plate portion 41, and extend from the back surface 41b toward the bottom portion 23 along the Z-axis direction. The four studs 48 are provided at four locations aligned along the X-axis direction near the end portion 41e.

[0070] The bracket 5 is a member for fixing the protrusion 44 and the corner 22c to each other. The bracket 5 is formed of, for example, a metal material (e.g., iron, aluminum, stainless steel, etc.). As shown in FIGS. 2 and 6 , the bracket 5 has wall portions 51 to 53. The wall portion 51 extends along the XY plane. The wall portion 51 is disposed between the protrusion 44 and the bottom portion 23 in the Z-axis direction. A through hole 51a is provided in the wall portion 51. The outer diameter of the through hole 51a is larger than the outer diameter of the screw hole 44a (see FIG. 5 ) of the protrusion 44. The wall portion 52 extends along the XZ plane and is connected to the wall portion 51. The wall portion 52 faces the side wall portion 223 in the Y-axis direction. A screw hole 52a is provided in the wall portion 52. The wall portion 53 extends along the YZ plane and is connected to the wall portion 51. The wall portion 53 faces the side wall portion 224 in the X-axis direction. The wall portion 53 is provided with a screw hole 53a.

[0071] 6 , the support member 4 is screwed to the corner portion 22c of the sidewall member 22 via the bracket 5. More specifically, the shank of screw S3 is inserted into the through hole 51a and threaded into the screw hole 44a, thereby fixing the bracket 5 and the protrusion 44 to each other. The shank of screw S4 is inserted into the through hole 223a and threaded into the screw hole 52a, thereby fixing the bracket 5 and the sidewall portion 223 to each other. The shank of screw S5 is inserted into the through hole 224a and threaded into the screw hole 53a, thereby fixing the bracket 5 and the sidewall portion 224 to each other.

[0072] (First Wiring Board) The first wiring board 6 is a board to which signals read out by the detection panel 3 are input from the detection panel 3. As shown in FIG. 2 and FIGS. 7 to 9, the first wiring board 6 is disposed in a position facing the rear surface 41b. The first wiring board 6 has a first surface 6a facing the rear surface 41b and a second surface 6b opposite the first surface 6a. Electronic components (such as a connector 61) described below are mounted on the first surface 6a and the second surface 6b. Note that the bottom 23 is not shown in FIG. 7.

[0073] The first wiring board 6 extends along the XY plane and is elongated in the Y-axis direction. When viewed in the Z-axis direction, the area of ​​the first wiring board 6 is smaller than the area of ​​the back surface 41b of the support member 4. The first wiring board 6 is disposed near the end 41f (see FIG. 6 ). More specifically, when viewed in the Z-axis direction, the first wiring board 6 is disposed along the end 41f so that the entire first wiring board 6 is located between the center of the back surface 41b and the end 41f in the X-axis direction. The first wiring board 6 has a protrusion 6c located outside the outer edge of the support member 4 when viewed in the Z-axis direction. More specifically, the protrusion 6c is located outside the end 41e when viewed in the Z-axis direction. The shape of the protrusion 6c when viewed in the Z-axis direction is rectangular. The protrusion 6c faces the side wall portion 223 in the Y-axis direction. More specifically, the protrusion 6c faces the thin-walled portion 223b of the side wall portion 223. As shown in FIG. 9, a part of the tip side of the protrusion 6c is disposed in a space SP formed inside the thin portion 223b.

[0074] As shown in FIGS. 7 and 10A and 10B , the first wiring substrate 6 is provided with a plurality of (two in this embodiment) through holes 6d and a plurality of (two in this embodiment) through holes 6e. The two through holes 6d are provided at two locations on both sides of the center of the first wiring substrate 6 in the Y-axis direction. Two pins 45a of the multiple pins 45 located on one side (the end 41f side) in the X-axis direction are inserted into the corresponding through holes 6d and reach the bottom 23. The two through holes 6e are provided at two locations on both sides in the Y-axis direction and are located further outward in the Y-axis direction than the two through holes 6d. Two pins 46a of the multiple pins 46 located on one side (the end 41f side) in the X-axis direction are inserted into the through holes 6e and reach the bottom 23. The first wiring substrate 6 is positioned relative to the support member 4 by inserting each pin 46a into each through hole 6e. That is, as described above, the two pins 46a function as members for fixing the support member 4 to an external member disposed outside the housing 2, and also function as members for positioning the first wiring board 6 relative to the support member 4. In this embodiment, of the two through holes 6e, the through hole 6e1 on one side in the Y-axis direction (the sidewall portion 222 side) is formed longer in the Y-axis direction than the through hole 6e2 on the other side in the Y-axis direction (the sidewall portion 223 side). This makes it possible to position the first wiring board 6 relative to the support member 4 while appropriately absorbing dimensional errors in the Y-axis direction between the support member 4 and the first wiring board 6. For example, if a small, tolerable error occurs between the center-to-center distance of the two pins 46a and the center-to-center distance of the two through holes 6e1 and 6e2 in the Y-axis direction, the long through hole 6e1 can absorb the error, and the two pins 46a can be inserted into the two through holes 6e1 and 6e2.

[0075] The first wiring board 6 has a plurality of through holes 6f (seven in this embodiment). Each of the through holes 6f is provided at a position corresponding to one of the pins 47. That is, the seven through holes 6f are aligned along the Y-axis direction. The first wiring board 6 is fixed to the back surface 41b of the flat plate portion 41 via the pins 47. More specifically, the shanks of a plurality of screws S6 (seven in this embodiment) are inserted into the through holes 6f and screwed into the thread grooves of the pins 47, thereby fixing the first wiring board 6 and the back surface 41b of the flat plate portion 41 to each other. A space corresponding to the height of the pins 47 is formed between the first surface 6a of the first wiring board 6 and the back surface 41b of the support member 4, and this space can be used to mount electronic components (such as a connector 61) on the first surface 6a.

[0076] As shown in FIGS. 10A and 10B , a plurality of electronic components are mounted on the first wiring board 6. Connectors 61 and 62 and an FPGA circuit C1 are mounted on the first surface 6a of the first wiring board 6. The connectors 61 and 62 are provided on the protruding portion 6c of the first wiring board 6. The connector 61 is located on one side in the X-axis direction (the upper side in FIG. 10A ), and the connector 62 is located on the other side in the X-axis direction (the lower side in FIG. 10A ). As shown in FIG. 9 , a portion of the tip side of the insertion port of the connector 62 is located in a space SP defined by the thin portion 223b of the side wall portion 223. Similarly, a portion of the tip side of the insertion port of the connector 61 is located in the space SP.

[0077] The connectors 61 and 62 are connected to an external device (e.g., an X-ray imaging device) not shown. The connector 61 is a connector for transmitting and receiving GigE (Gigabit Ethernet (registered trademark)) signals to and from the external device. The socket of the connector 61 is exposed to the outside of the housing 2 through an opening 223d (see FIG. 3 ) provided in the side wall portion 223 (thin portion 223b). The connector 62 is a connector for transmitting and receiving I / O signals and receiving power to and from the external device. The socket of the connector 62 is exposed to the outside of the housing 2 through an opening 223e provided in the side wall portion 223 (thin portion 223b).

[0078] The FPGA circuit C1 controls each circuit mounted on the first wiring board 6. As an example, the FPGA circuit C1 is located in the center of the first surface 6a in the Y-axis direction. The FPGA circuit C1 includes an FPGA 63. The FPGA 63 is a device (FPGA: Field Programmable Gate Array) that integrates gates that allow the user to program the configuration of a logic circuit.

[0079] Note that circuit elements other than the above-described elements (e.g., an LED indicator, a PHY circuit, a power supply circuit, etc.) may also be mounted on the first surface 6a of the first wiring board 6. The LED indicator is an indicator that displays the status of the radiation imaging device 1. The LED indicator may be arranged so as to be exposed to the outside of the housing 2, for example, through each opening 223f provided in the side wall portion 223 (thin portion 223b). The PHY circuit is a circuit that includes, for example, a device (Ethernet (registered trademark) PHY) for implementing a physical layer in a network protocol. The power supply circuit is a circuit that generates power in the radiation imaging device 1.

[0080] A plurality of connectors 64 (12 in this embodiment), one connector 65, and an ADC circuit C2 are mounted on the second surface 6b of the first wiring board 6. Each connector 64 is connected to a corresponding first flexible connecting member 10. Each connector 64 is located near an end 6g on one side in the X-axis direction of the first wiring board 6 (the lower side in FIG. 10B ) and is aligned along the Y-axis direction. The end 6g faces the side wall portion 224 in the X-axis direction (see FIG. 7 ). A third flexible connecting member 12 is connected to the connector 65. The connector 65 is located on the other side in the X-axis direction (the upper side in FIG. 10B ).

[0081] The ADC circuit C2 converts the pixel voltage value output from the connector 64 into a digital signal. The ADC circuit C2 is located on one side in the X-axis direction (the upper side in FIG. 10(b)) of the connector 64. The ADC circuit C2 includes four AD converters 66. The AD converters 66 are elements that convert analog signals into digital signals.

[0082] Note that circuit elements other than those described above (e.g., a bias voltage circuit, a level shift circuit, a connector for communicating with the FPGA 63, a connector for connecting to a function expansion board such as a voltage monitor circuit, etc.) may also be mounted on the second surface 6b of the first wiring board 6. The bias voltage circuit generates a bias voltage to be supplied to the connector 64. The level shift circuit converts the Hi level of the digital signal output from the ADC circuit C2.

[0083] (Second Wiring Board) The second wiring board 7 is a board that outputs a signal to the detection panel 3 to start reading out a signal in the detection panel 3. The above-mentioned "signal to start reading out a signal in the detection panel 3" may include, for example, a signal that drives a gate driver IC (not shown) mounted on the second flexible connecting member 11 (described later). As shown in FIGS. 2 and 6 to 9, the second wiring board 7 is disposed in a position facing the rear surface 41b. The second wiring board 7 is disposed between the first wiring board 6 and the rear surface 41b in the Z-axis direction. The second wiring board 7 has a third surface 7a facing the rear surface 41b and a fourth surface 7b opposite the third surface 7a. Electronic components (such as a connector 71) (described later) are mounted on the fourth surface 7b, while no electronic components are mounted on the third surface 7a.

[0084] The second wiring board 7 extends along the XY plane and is a board that is elongated in the X-axis direction. When viewed in the Z-axis direction, the area of ​​the second wiring board 7 is smaller than the area of ​​the back surface 41b of the support member 4. In this embodiment, the area of ​​the second wiring board 7 is smaller than the area of ​​the first wiring board 6. The second wiring board 7 is disposed near the end 41e. More specifically, when viewed in the Z-axis direction, the second wiring board 7 is disposed along the end 41e so that the entire second wiring board 7 is located between the center of the back surface 41b and the end 41e in the Y-axis direction.

[0085] The second wiring board 7 has a plurality of (four in this embodiment) through holes 7c (see FIG. 2 ). Each through hole 7c is provided at a position corresponding to one of the studs 48. More specifically, the four through holes 7c are aligned along the X-axis direction. The second wiring board 7 is fixed to the back surface 41b of the flat plate portion 41 via a plurality of studs 48. The second wiring board 7 is fixed to the back surface 41b via an insulating protective film 8 (see FIG. 2 ) disposed between the second wiring board 7 (third surface 7a) and the back surface 41b. The protective film 8 has a plurality of (four in this embodiment) through holes 8a (see FIG. 2 ). Each through hole 8a is provided at a position corresponding to one of the through holes 7c. Each stud 48 is inserted sequentially through each of the through holes 8a and 7c. Each nut 9 is screwed onto each of the studs 48 inserted into each of the through holes 8a and 7c, thereby fixing the second wiring board 7 to the back surface 41b. 6 , the area of ​​the protective film 8 is larger than the area of ​​the second wiring board 7. As a result, when the second wiring board 7 is fixed to the back surface 41b, the entire third surface 7a of the second wiring board 7 is protected by the protective film 8. The protective film 8 is made of a resin material such as polyethylene terephthalate (PET). The thickness of the protective film 8 in the Z-axis direction is, for example, 0.1 mm or more and 0.2 mm or less. Because the protective film 8 is sandwiched between the flat plate portion 41 and the second wiring board 7, it is not fixed (adhered) to the third surface 7a or the back surface 41b. However, the protective film 8 may be fixed (adhered) to at least one of the third surface 7a and the back surface 41b.

[0086] 6 , a plurality of connectors 71 (five in this embodiment) and one connector 72 are mounted on the fourth surface 7b of the second wiring board 7. Each connector 71 is connected to a corresponding second flexible connecting member 11. Each connector 71 is located near an end 7d on one side (the sidewall 223 side) of the second wiring board 7 in the Y-axis direction, and is aligned along the X-axis direction. A third flexible connecting member 12 is connected to the connector 72. The connector 72 is located near an end 7e on the other side (the sidewall 222 side) in the Y-axis direction. In addition to the connectors 71 and 72, a resistor and a capacitor (e.g., a bypass capacitor for noise reduction) may also be mounted on the fourth surface 7b of the second wiring board 7.

[0087] (Arrangement of Wiring Boards) The arrangement of the first wiring board 6 and the second wiring board 7 will be described with reference to FIGS. 6 to 9. When viewed from the Z-axis direction, at least a portion of the first wiring board 6 overlaps with the second wiring board 7. In this embodiment, when viewed from the Z-axis direction, a portion of one side of the first wiring board 6 in the Y-axis direction (the side wall portion 223 side) overlaps a portion of one side of the second wiring board 7 in the X-axis direction (the side wall portion 224 side), inside the outer edge of the support member 4. In other words, when viewed from the Z-axis direction, an overlap region R (see FIGS. 6 to 9) is formed where the first wiring board 6 and the second wiring board 7 overlap. In this embodiment, the first wiring board 6 and the second wiring board 7 are arranged in a substantially L-shape when viewed from the Z-axis direction.

[0088] The first flexible connecting member 10 connects the detection panel 3 and the first wiring board 6. As shown in FIGS. 6 and 7 , when viewed from the Z-axis direction, the first flexible connecting member 10 is disposed so as to connect the detection panel 3 and the first wiring board 6 via the side of the end 41f of the support member 4. In this embodiment, when viewed from the Z-axis direction, the first flexible connecting member 10 passes via the side of the side wall portion 43. In this embodiment, the first flexible connecting member 10 is a flexible substrate having a structure in which a circuit pattern made of a conductor foil (e.g., copper) is formed on a thin-film insulator (e.g., polyimide). An IC chip (not shown) is mounted on the first flexible connecting member 10. The IC chip is a readout circuit (ROIC: Readout IC) that performs processing to read signals from the detection panel 3. Note that the first flexible connecting member 10 may be any flexible member, and may be, for example, a flexible flat cable having a structure in which multiple thin, flat conductors are arranged and sandwiched between insulating films from above and below. One end of the first flexible connecting member 10 is connected to the connector 64. The other end of the first flexible connecting member 10 is connected to an electrode pad (not shown) provided near the end 31d (see FIG. 2) on the first surface 31a of the sensor substrate 31. As shown in FIGS. 7 and 8 , in the overlapping region R, the first wiring substrate 6 is connected to at least one first flexible connecting member 10. That is, at least a portion of at least one connector 64 is arranged in the overlapping region R.

[0089] The second flexible connecting member 11 connects the detection panel 3 and the second wiring board 7. As shown in FIGS. 6 and 7 , when viewed from the Z-axis direction, the second flexible connecting member 11 is arranged to connect the detection panel 3 and the second wiring board 7 via the side of the end 41 e of the support member 4. In this embodiment, the second flexible connecting member 11, like the first flexible connecting member 10, is a flexible substrate having a structure in which a circuit pattern made of a conductor foil (e.g., copper) is formed on a thin-film insulator (e.g., polyimide). A gate driver IC (not shown) is mounted on the second flexible connecting member 11. Note that the second flexible connecting member 11 may be any flexible member, and may be, for example, a flexible flat cable having a structure in which multiple thin, flat conductors are arranged and sandwiched between insulating films from above and below. One end of the second flexible connecting member 11 is connected to the connector 71. The other end of the second flexible connecting member 11 is connected to an electrode pad (not shown) provided near the end 31c (see FIG. 2) on the first surface 31a of the sensor substrate 31. As shown in FIGS. 6 and 9, in the overlapping region R, the second wiring substrate 7 is connected to at least one second flexible connecting member 11. That is, at least a portion of at least one connector 71 is arranged in the overlapping region R.

[0090] The third flexible connecting member 12 connects the first wiring board 6 and the second wiring board 7. As shown in FIGS. 7 to 9 , the third flexible connecting member 12 is connected to the connector 65 and the connector 72. The third flexible connecting member 12 has a first portion 12a connected to the connector 65 and extending along the X-axis direction, and a second portion 12c folded back at an end 12b opposite the end of the first portion 12a connected to the connector 65, extending along the Y-axis direction, and connected to the connector 72. In this embodiment, the third flexible connecting member 12 is a flexible flat cable having a structure in which multiple thin, flat conductors are arranged and sandwiched between insulating films from above and below. This allows the first wiring board 6 and the second wiring board 7 to be connected inexpensively by bending the third flexible connecting member 12. Furthermore, by configuring the third flexible connecting member 12 as a flexible flat cable, the third flexible connecting member 12 can be easily bent and connected to the first wiring board 6 and the second wiring board 7. However, the third flexible connecting member 12 may be any flexible member, such as a flexible substrate having a structure in which a circuit pattern made of a conductive foil (e.g., copper) is formed on a thin-film insulator (e.g., polyimide). In this case, a capacitor can be mounted on the third flexible connecting member 12, thereby eliminating noise and stabilizing voltage. As shown in FIG. 7 , the connectors 65 and 72 are disposed outside the overlapping region R (the region where the first wiring board 6 and the second wiring board 7 do not overlap when viewed from the Z-axis direction), and the third flexible connecting member 12 is disposed only in the space outside the overlapping region R. In this way, in this embodiment, the first wiring board 6 and the second wiring board 7 are offset in the height direction (Z-axis direction) and overlap in a substantially L-shape, thereby allowing the third flexible connecting member 12 to be disposed in a region inside the substantially L-shaped first wiring board 6 and second wiring board 7 (i.e., a region that does not affect the dimensional increase of the radiation imaging device 1 in a plan view). This makes it possible to easily connect the first wiring board 6 and the second wiring board 7 while avoiding the dimension of the radiation imaging device 1 as viewed in the Z-axis direction from being increased by the third flexible connecting member 12.

[0091] (Length Relationships of Components of Radiation Imaging Apparatus) The length relationships of the components of the radiation imaging apparatus 1 will be described with reference to FIGS. 8 and 9 . As shown in FIGS. 8 and 9 , the length of the side wall portion 42 along the Z-axis direction is longer than the thickness of the flat plate portion 41 along the Z-axis direction. In this embodiment, the length L1 of the wall portion 421 along the Z-axis direction is longer than the thickness T1 of the flat plate portion 41 along the Z-axis direction. Furthermore, the length L2 of the wall portion 422 along the Z-axis direction is longer than the thickness T1 of the flat plate portion 41 along the Z-axis direction. The thickness T1 is the length along the Z-axis direction from the support surface 41a to the back surface 41b. The length L1 is the length along the Z-axis direction from the back surface 41b to the top of the wall portion 421. The length L2 is the length along the Z-axis direction from the back surface 41b to the top of the wall portion 422. The thickness T1 is, for example, 3 mm or less. The lengths L1 and L2 are, for example, 9 mm or more. The lengths L1 and L2 are, for example, three times or more the thickness T1. The length L3 of the side wall 43 along the Z axis direction is shorter than the lengths L1 and L2. The length L3 is the length along the Z axis direction from the rear surface 41b to the top of the side wall 43.

[0092] An example of the length relationship between the components of the radiation imaging device 1 will be described with reference to FIG. 11 . The thickness T1 of the flat plate portion 41 is, for example, 1.2 mm, and the lengths L1 and L2 of the wall portions 421 and 422 are, for example, 10.3 mm. The thickness T2 of the lid portion 21 along the Z-axis direction is, for example, 1.2 mm. The thickness T3 of the bottom portion 23 along the Z-axis direction is, for example, 1.2 mm. The thickness T4 of the detection panel 3 (total thickness of the sensor substrate 31 and the scintillator 32) along the Z-axis direction is, for example, 1.0 mm. The distance D1 from the inner surface of the lid portion 21 along the Z-axis direction to the surface of the scintillator 32 facing the lid portion 21 is, for example, 0.7 mm. The distance D2 from the inner surface of the bottom portion 23 along the Z-axis direction to the top of the wall portion 422 is, for example, 2.4 mm. The total thickness of the radiation imaging device 1 along the Z-axis direction is the sum of the thicknesses T1 to T4, the length L2, and the distances D1 and D2, and is, for example, 18.0 mm.

[0093] 6 to 9, in the radiation imaging device 1 described above, when viewed from the Z-axis direction, at least a portion of the first wiring board 6 overlaps with the second wiring board 7 in the overlap region R. This allows the first wiring board 6 and the second wiring board 7 to be compactly arranged in a direction perpendicular to the Z-axis direction (XY plane direction), making it possible to suppress an increase in the size of the first wiring board 6 and the second wiring board 7 as a whole (or of the member supporting the first wiring board 6 and the second wiring board 7 (in this embodiment, the support member 4); the same applies below) in a planar view. Therefore, with the above configuration, it is possible to suppress an increase in the size of the radiation imaging device 1 in a planar view.

[0094] Typically, the second wiring board 7 to which the second flexible connecting member 11 is connected is provided at a position overlapping the light receiving unit 33 in the Z-axis direction. If the first wiring board 6 does not overlap the second wiring board 7 when viewed in the Z-axis direction (for example, if the first wiring board 6 is adjacent to the second wiring board 7 in the X-axis direction), the light receiving unit 33 is not considered to be provided at a position overlapping the first wiring board 6 in the Z-axis direction. This is because it is difficult to connect the second flexible connecting member 11 to an electrode pad provided near a portion of the light receiving unit 33 located at a position overlapping the first wiring board 6 in the Z-axis direction (a position not overlapping the second wiring board 7 in the Z-axis direction). In this case, it is necessary to use a support member 4 that is larger than necessary compared to the size of the light receiving unit 33, which results in the size of the housing 2 being larger than necessary. In contrast, in the radiation imaging device 1, at least a portion of the first wiring board 6 overlaps with the second wiring board 7 when viewed in the Z-axis direction, and therefore the light receiving unit 33 can be provided at a position in the Z-axis direction that overlaps with at least that portion of the first wiring board 6. This eliminates the need to use a support member 4 that is larger than necessary for the size of the light receiving unit 33, thereby preventing an increase in the dimensions of the radiation imaging device 1 in a plan view.

[0095] 6 to 9 , in an overlap region R where the first wiring board 6 and the second wiring board 7 overlap when viewed from the Z-axis direction, the first wiring board 6 is connected to the first flexible connecting member 10, and the second wiring board 7 is connected to the second flexible connecting member 11. According to the above configuration, by arranging the portion of the first wiring board 6 that is connected to the first flexible connecting member 10 and the portion of the second wiring board 7 that is connected to the second flexible connecting member 11 in the overlap region R, it is possible to effectively reduce the overall dimensions of the first wiring board 6 and the second wiring board 7 in a planar view. Therefore, according to the above configuration, it is possible to effectively suppress an increase in the dimensions of the radiation imaging device 1 in a planar view.

[0096] 2 , 7 , and 8 , the second wiring board 7 is disposed between the first wiring board 6 and the back surface 41 b in the Z-axis direction. Typically, the first wiring board 6, to which signals read out by the detection panel 3 are input from the detection panel 3, has more electronic components mounted thereon than the second wiring board 7, which outputs a signal to the detection panel 3 to initiate signal readout by the detection panel 3. According to the above configuration, the first wiring board 6, which requires a larger mounting area than the second wiring board 7, is disposed farther from the back surface 41 b of the support member 4 than the second wiring board 7, thereby enabling electronic components to be mounted on both sides of the first wiring board 6. This makes it easy to ensure a sufficient mounting area on the first wiring board 6.

[0097] 7 and 10(a) and 10(b), electronic components are mounted on the first surface 6a and the second surface 6b of the first wiring board 6 and the fourth surface 7b of the second wiring board 7, and no electronic components are mounted on the third surface 7a of the second wiring board 7. According to the above configuration, since electronic components are mounted on the first surface 6a and the second surface 6b of the first wiring board 6, a relatively large number of electronic components can be mounted on the first wiring board 6. Furthermore, since no electronic components are mounted on the third surface 7a of the second wiring board 7, the third surface 7a can be brought closer to the rear surface 41b of the support member 4. This allows the radiation imaging device 1 to be made thinner.

[0098] 10A, an FPGA 63 is provided on the first wiring board 6. With the above configuration, the distance between the first flexible connecting member 10 and the FPGA 63 can be shortened compared to when the FPGA 63 is provided on the second wiring board 7, thereby suppressing noise superposition on the signal input from the first flexible connecting member 10 to the FPGA 63. Furthermore, signal distortion caused by a long transmission distance can be suppressed. This enables accurate signal processing in the FPGA 63, thereby enabling highly accurate readout from the detection panel 3.

[0099] 10(b), an AD converter 66 is provided on the first wiring board 6. Typically, the signal input from the detection panel 3 to the first wiring board 6 via the first flexible connecting member 10 is an analog signal. With the above configuration, the distance between the first flexible connecting member 10 and the AD converter 66 can be shortened compared to when the AD converter 66 is provided on the second wiring board 7, thereby suppressing distortion of the analog signal caused by a long transmission distance. In addition, it is possible to suppress noise from being superimposed on the signal input from the first flexible connecting member 10 to the AD converter 66.

[0100] 10(a) and 10(b), both the FPGA 63 and the AD converter 66 are provided on the first wiring board 6. This allows the distances between the first flexible connecting member 10, the FPGA 63, and the AD converter 66 to be shortened, thereby suppressing signal distortion and suppressing noise superposition on the signals between these electronic components, as described above. This allows more accurate signal processing on the first wiring board 6 compared to when only one of the FPGA 63 and the AD converter 66 is provided on the first wiring board 6, and as a result, allows for more accurate readout from the detection panel 3.

[0101] 10A, connectors 61 and 62 connected to an external device are provided on the first wiring board 6. With the above configuration, the transmission distance of signals processed on the first wiring board 6 to the connectors 61 and 62 can be shortened compared to when the connectors 61 and 62 are provided on the second wiring board 7, thereby suppressing noise from being superimposed on the signals. Therefore, the signals can be accurately output to the external device via the connectors 61 and 62.

[0102] As shown in FIGS. 3 , 7 , and 10A , the first wiring board 6 has a protrusion 6 c positioned outside the outer edge (end 41 e) of the support member 4 when viewed in the Z-axis direction. The connectors 61 and 62 are provided on the protrusion 6 c of the first wiring board 6 and exposed to the outside of the housing 2 through openings 223 d and 223 e provided in the sidewall member 22 (sidewall portion 223). According to the above configuration, by providing the connectors 61 and 62 on the protrusion 6 c of the first wiring board 6, the distance between the connectors 61 and 62 and the outer surface of the sidewall member 22 of the housing 2 (the outer surface of the sidewall portion 223) can be shortened. That is, according to the above configuration, the distance from the outside of the housing 2 (sidewall portion 223) to the insertion openings of the connectors 61 and 62 can be effectively shortened. This facilitates connection of the connectors 61 and 62 to an external device through the openings 223 d and 223 e provided in the sidewall member 22 (sidewall portion 223).

[0103] As shown in FIG. 3 , the openings 223d and 223e are provided in the thin-walled portion 223b of the side wall 223. According to the above configuration, by configuring the portions of the side wall 223 where the openings 223d and 223e are provided using the thin-walled portion 223b, the distance between the connectors 61 and 62 and the outer surface of the side wall member 22 of the housing 2 (the outer surface of the side wall 223) can be shortened. This makes it easier to connect the connectors 61 and 62 to an external device via the openings 223d and 223e provided in the side wall 223. Note that the same effect as described above can also be achieved by making the thickness of the side wall 223 (i.e., the entire thickness of the side wall 223) thinner than the thickness of portions other than the side wall 223 (the other side wall portions 221, 222, and 224). For example, the above effect can also be achieved by forming the entire side wall 223 to have the same thickness as the thin-walled portion 223b. However, by configuring the parts of the side wall portion 223 other than the thin portion 223b with the thick portion 223c, the strength of the housing 2 can be ensured compared to when the entire side wall portion 223 is configured with the thin portion 223b.

[0104] 2, the radiation imaging device 1 includes a protective film 8 disposed between the second wiring board 7 and the rear surface 41b, and the second wiring board 7 is fixed to the rear surface 41b via the protective film 8. With the above configuration, even if burrs or the like are formed on the rear surface 41b of the support member 4, it is possible to prevent adverse effects, such as damage to the wiring of the second wiring board 7, caused by the burrs or the like. Furthermore, in the case where the support member 4 is made of a metal material, as in this embodiment, by forming the protective film 8 from an insulating material, it is possible to electrically insulate the second wiring board 7 from the rear surface 41b, and to prevent electrical effects on the second wiring board 7.

[0105] 8, the second wiring board 7 is fixed to the rear surface 41b by inserting the studs 48 into the through holes 7c and screwing nuts 9 onto the studs 48. With the above configuration, it is not necessary to provide screw grooves in the second wiring board 7 and the support member 4 for fixing the second wiring board 7 to the rear surface 41b, and therefore the second wiring board 7 and the support member 4 can be made thinner.

[0106] 5 to 7, the support member 4 has positioning pins 46a provided on the back surface 41b, and through holes 6e through which the pins 46a are inserted are provided in the first wiring board 6. According to the above configuration, the first wiring board 6 can be positioned with respect to the back surface 41b of the support member 4 by inserting the positioning pins 46a into the through holes 6e provided in the first wiring board 6.

[0107] 7 , when viewed from the Z-axis direction, the area of ​​each of the first wiring board 6 and the second wiring board 7 is smaller than the area of ​​the back surface 41 b of the support member 4. The first wiring board 6 is a board that is elongated along the Y-axis direction and is arranged near one end 41 f of the support member 4 in the X-axis direction when viewed from the Z-axis direction. The second wiring board 7 is a board that is elongated along the X-axis direction and is arranged near one end 41 e of the support member 4 in the Y-axis direction when viewed from the Z-axis direction. The first flexible connecting member 10 is arranged to connect the detection panel 3 and the first wiring board 6 via a side of the end 41 f of the support member 4. The second flexible connecting member 11 is arranged to connect the detection panel 3 and the second wiring board 7 via a side of the end 41 e of the support member 4. According to the above configuration, the first wiring board 6 and the second wiring board 7 are arranged to intersect in a substantially L-shape when viewed from the Z-axis direction. After arranging the first wiring board 6 and the second wiring board 7 in this manner, the first flexible connecting member 10 is passed through the side of the end 41 f of the support member 4 along the first wiring board 6, and the second flexible connecting member 11 is passed through the side of the end 41 e of the support member 4 along the second wiring board 7. This allows the wiring boards 6, 7 to be easily connected to the flexible connecting members 10, 11 while avoiding interference between the first flexible connecting member 10 and the second flexible connecting member 11. Furthermore, as described above, by reducing the areas of the first wiring board 6 and the second wiring board 7, in this embodiment, the total area of ​​the first wiring board 6 and the second wiring board 7 is smaller than the area of ​​the back surface 41 b of the support member 4. This reduces the manufacturing cost of the first wiring board 6 and the second wiring board 7. More specifically, since large-area wiring boards are generally expensive, using multiple small-area wiring boards 6, 7 as in this embodiment can reduce the cost of the wiring boards.

[0108] 7 , the radiation imaging device 1 includes a third flexible connecting member 12 that connects the first wiring board 6 and the second wiring board 7. According to the above configuration, by using the third flexible connecting member 12 as a member that connects the first wiring board 6 and the second wiring board 7, the first wiring board 6 and the second wiring board 7 can be easily connected even when the connectors 65, 72 (connection ports) of each wiring board are provided in a portion where the first wiring board 6 and the second wiring board 7 do not overlap (when the connectors 65 and 72 are mounted on the first wiring board 6 and the second wiring board 7, respectively, outside the overlapping region R). For example, as in the present embodiment, by bending the third flexible connecting member 12 so that a portion of the third flexible connecting member 12 extends in the Y-axis direction and another portion of the third flexible connecting member 12 extends in the X-axis direction, it becomes easy to connect the portion of the third flexible connecting member 12 to the second wiring board 7 and the other portion of the third flexible connecting member 12 to the first wiring board 6. It is also possible to arrange a connector of the first wiring board 6 (corresponding to connector 65) and a connector of the second wiring board 7 (corresponding to connector 72) in the overlap region R and connect these connectors with a connecting member extending in the Z-axis direction. However, in such a configuration, it is necessary to arrange the connectors and the connecting member between the first wiring board 6 and the second wiring board 7, which requires increasing the distance between the first wiring board 6 and the second wiring board 7 in the Z-axis direction, which may increase the dimensions of the radiation imaging device 1 in the Z-axis direction. Furthermore, the connection work may become complicated because it is necessary to accurately align the positions of the connectors on the first wiring board 6 and the second wiring board 7. By connecting the first wiring board 6 and the second wiring board 7 using the third flexible connecting member 12 as described above, such problems can be avoided.

[0109] As shown in Fig. 5 , in the radiation imaging device 1, the support member 4 has a flat plate portion 41 extending along a plane (XY plane) perpendicular to the Z-axis direction, and a side wall portion 42 extending in the Z-axis direction longer than the thickness of the flat plate portion 41. This makes it possible to reduce the weight of the support member 4 by thinning the flat plate portion 41 while suppressing a decrease in the strength of the support member 4. Furthermore, as shown in Fig. 6 , by screwing the side wall portion 42, which has a length longer than the thickness of the flat plate portion 41, to the side wall member 22 of the housing 2, the support member 4 can be stably fixed to the housing 2. Therefore, with the above configuration, it is possible to achieve both a reduction in the weight of the radiation imaging device 1 and suppress a decrease in the strength of the radiation imaging device 1.

[0110] 11 , the thickness T1 of the flat plate portion 41 along the Z-axis direction is, for example, 3 mm or less. According to the above configuration, the weight of the support member 4 can be effectively reduced, and therefore the weight of the radiation imaging device 1 can be effectively reduced.

[0111] 11 , the length of the side wall 42 along the Z-axis direction (length L1 of the wall 421 and length L2 of the wall 422) is, for example, 9 mm or more. With the above configuration, the length of the side wall 42 (walls 421, 422) can be made sufficiently long (the length of the side wall 42 for screw fastening can be ensured sufficiently), so that the side wall 42 of the support member 4 and the side wall member 22 of the housing 2 can be more reliably screwed together. Therefore, the support member 4 can be more stably fixed to the housing 2.

[0112] Although it depends on the size of the screws used, in order to screw the support member 4 to another member, the thickness of the portion of the support member 4 to be screwed usually needs to be, for example, 4 mm or more. If the thickness T1 of the flat plate portion 41 is reduced to less than 4 mm, it may be possible to reduce the weight of the support member 4, but it may be difficult to screw the side wall member 22 to the flat plate portion 41. In the radiation imaging device 1, the support member 4 has a side wall portion 42 that is longer (for example, 9 mm or more) than the thickness of the flat plate portion 41. This allows the side wall portion 42 to be screwed to the side wall member 22 even if the thickness T1 of the flat plate portion 41 is reduced.

[0113] 11 , the length of the side wall portion 42 along the Z-axis direction (the length L1 of the wall portion 421 and the length L2 of the wall portion 422) is, for example, three times or more the thickness T1 of the flat plate portion 41 along the Z-axis direction. According to the above configuration, the length of the side wall portion 42 (the wall portions 421, 422) can be made sufficiently long (the length of the side wall portion 42 for screw fastening can be ensured sufficiently), so that the side wall portion 42 of the support member 4 and the side wall member 22 of the housing 2 can be more reliably screwed together. Therefore, the support member 4 can be more stably fixed to the housing 2.

[0114] 5, the wall portions 421, 422 (side wall portion 42) extend along the Z-axis direction from the ends 41c, 41d of the flat plate portion 41. According to the above configuration, the wall portions 421, 422 (side wall portion 42) can be easily formed integrally with the flat plate portion 41, for example, by bending a flat plate-shaped member (bending process).

[0115] 2, the lid 21, the side wall member 22, and the bottom 23 are formed as separate bodies. With the above configuration, when manufacturing the radiation imaging device 1, the side wall 42 of the support member 4 can be screwed to the side wall member 22 with the lid 21 and the bottom 23 detached from the side wall member 22, making it possible to easily fix the support member 4 to the housing 2.

[0116] 3, 5, and 6, the side wall member 22 has a side wall portion 221 extending along the Y-axis direction, and the support member 4 is fixed to the housing 2 by screwing the side wall portion 42 (wall portion 421) to the side wall portion 221 at two or more locations. According to the above configuration, since the side wall portion 42 is screwed to the side wall portion 221 at two or more locations, the support member 4 can be more stably fixed to the housing 2.

[0117] 3 , 5 and 6 , the side wall member 22 extends along the X-axis direction and further includes a side wall portion 222 connected to the side wall portion 221, and the side wall portion 42 includes a wall portion 421 facing the side wall portion 221 and a wall portion 422 facing the side wall portion 222, and the support member 4 is fixed to the housing 2 by screwing the wall portion 421 to the side wall portion 221 and the wall portion 422 to the side wall portion 222. According to the above configuration, the wall portion 421 to the side wall portion 221 and the wall portion 422 to the side wall portion 222 are screwed together, so that the support member 4 can be more stably fixed to the housing 2.

[0118] 3 and 6 , the support member 4 is screwed to the corner 22c of the side wall member 22 formed by the side wall portions 223 and 224. According to the above configuration, the support member 4 is screwed not only to the side wall portions 221 and 222 but also to the corner 22c (a corner diagonally opposite the corner 22a formed by the side wall portions 221 and 222), so that the support member 4 can be fixed to the housing 2 more stably.

[0119] 6 , the support member 4 is screwed to the corner 22c of the side wall member 22 via the bracket 5. According to the above configuration, even if an error occurs in the dimensions of the support member 4 and the housing 2, the error can be absorbed by using the bracket 5 formed separately from the housing 2 and the support member 4, and the support member 4 can be properly fixed to the housing 2.

[0120] 5, the support member 4 further includes a side wall portion 43 that extends along the Z-axis direction from an end portion 41f of the flat plate portion 41 that faces the side wall portion 224 and is formed integrally with the flat plate portion 41. According to the above configuration, since the support member 4 includes the side wall portion 43, a decrease in the strength of the support member 4 can be more effectively suppressed.

[0121] 8 , the length L3 of the side wall 43 along the Z axis direction is shorter than the length of the side wall 42 along the Z axis direction (the length L1 of the wall 421 and the length L2 of the wall 422), and when viewed from the Z axis direction, the first flexible connecting member 10 passes along the side of the side wall 43. According to the above configuration, since the length L3 of the side wall 43 along the Z axis direction is shorter than the length of the side wall 42 along the Z axis direction (the length L1 of the wall 421 and the length L2 of the wall 422), the first flexible connecting member 10 can easily pass along the side of the side wall 43 without coming into contact with the side wall 43.

[0122] Second Embodiment The configuration of a radiation imaging device 1A according to a second embodiment will be described with reference to Fig. 12. The radiation imaging device 1A differs from the radiation imaging device 1 mainly in that it has a side wall member 22A and a support member 4A instead of the side wall member 22 and the support member 4, and further has a bracket 5A. The following mainly describes the parts of the configuration of the radiation imaging device 1A that differ from the radiation imaging device 1.

[0123] The side wall portion 222 of the side wall member 22A differs from the side wall portion 222 of the side wall member 22 in that it does not have a through hole 222a (see FIG. 3) but has a through hole 222b. The through hole 222b is provided in a portion 22b1 of the corner 22b of the side wall portion 222. The side wall portion 224 of the side wall member 22A also differs from the side wall portion 224 of the side wall member 22 in that it has a through hole 224b. The through hole 224b is provided in a portion 22b2 of the corner 22b of the side wall portion 224.

[0124] The support member 4A differs from the support member 4 primarily in that it does not have a wall portion 422 (see FIG. 5 ) but further includes a protrusion 44A integrally formed with the flat plate portion 41. Like the protrusion 44, the protrusion 44A is formed in a generally rectangular plate shape extending along the same plane as the flat plate portion 41. A screw hole (not shown) penetrating in the Z-axis direction is provided at the approximate center of the protrusion 44A. The protrusion 44A is provided so as to protrude outward from the corner between the end portions 41d and 41f of the flat plate portion 41. That is, the protrusion 44A protrudes toward the corner 22b from the corner of the flat plate portion 41 facing the corner 22b of the sidewall member 22. The protrusion 44A is spaced apart from the corner 22b when the support member 4A is fixed to the housing 2 (sidewall member 22A).

[0125] The bracket 5A is a member for fixing the protrusion 44A and the corner 22b to each other. The bracket 5A has a configuration similar to that of the bracket 5. In the radiation imaging device 1A, the support member 4A is fixed to the corner 22b via the bracket 5A. More specifically, the shank of a screw S7 is inserted into a through-hole provided in the wall 51 of the bracket 5A and threaded into a screw hole provided in the protrusion 44A, thereby fixing the bracket 5A and the protrusion 44A to each other. The shank of a screw S8 is inserted into the through-hole 224b and threaded into a screw hole provided in the wall 52 of the bracket 5A, thereby fixing the bracket 5A to the side wall 224 to each other. The shank of a screw S9 is inserted into the through-hole 222b and threaded into a screw hole provided in the wall 53 of the bracket 5A, thereby fixing the bracket 5A to the side wall 222 to each other.

[0126] In the radiation imaging apparatus 1A described above, the same effects as those of the radiation imaging apparatus 1 according to the first embodiment can be achieved with respect to the configurations common to the radiation imaging apparatus 1A.

[0127] Furthermore, in the radiation imaging device 1A, the side wall portions 222 and 224 form the corner portion 22b of the side wall member 22A, and the side wall portions 223 and 224 form the corner portion 22c of the side wall member 22A, and the support member 4A is fixed to the housing 2 by screwing the side wall portion 42 (wall portion 421) to the side wall portion 221 and by screwing the corner portions 22b and 22c to the support member 4A. According to the above configuration, the support member 4A is screwed not only to the side wall portion 221 but also to the corner portion 22b (a corner diagonally opposite to the corner portion 22d) and the corner portion 22c (a corner diagonally opposite to the corner portion 22a), so that the support member 4A can be fixed to the housing 2 more stably.

[0128] [Third Embodiment] The configuration of a radiation imaging apparatus 1B according to a third embodiment will be described with reference to Fig. 13. The radiation imaging apparatus 1B differs from the radiation imaging apparatus 1A mainly in that it has a side wall member 22B and a support member 4B instead of the side wall member 22A and the support member 4A, and further has brackets 5B and 5C. The following mainly describes the parts of the configuration of the radiation imaging apparatus 1B that differ from the radiation imaging apparatus 1A.

[0129] The side wall portion 221 of the side wall member 22B differs from the side wall portion 221 of the side wall member 22A in that it does not have a through hole 221a (see FIG. 3 ) but has through holes 221b and 221c. The through hole 221b is provided in a portion 22a1 of the corner 22a of the side wall portion 221. The through hole 221c is provided in a portion 22d1 of the corner 22d of the side wall portion 221. The side wall portion 222 of the side wall member 22B differs from the side wall portion 222 of the side wall member 22A in that it also has a through hole 222c. The through hole 222c is provided in a portion 22a2 of the corner 22a of the side wall portion 222. The side wall portion 223 of the side wall member 22B differs from the side wall portion 223 of the side wall member 22A in that it also has a through hole 223g. The through-hole 223 g is provided in a portion 22 d 2 of the corner 22 d of the side wall portion 223 .

[0130] The support member 4B does not have a side wall portion 42 (see FIG. 5). That is, the support member 4B does not have walls 421, 422. The support member 4B differs from the support member 4A in that it further has protrusions 44B, 44C formed integrally with the flat plate portion 41. Like the protrusions 44, 44A, the protrusions 44B, 44C are formed in a generally rectangular plate shape extending along the same plane as the flat plate portion 41. A screw hole (not shown) penetrating in the Z-axis direction is provided at approximately the center of the protrusions 44B, 44C.

[0131] The protruding portion 44B is provided so as to protrude outward from the corner between the end 41c and the end 41d of the flat plate portion 41. That is, the protruding portion 44B protrudes from the corner of the flat plate portion 41 facing the corner 22a of the side wall member 22B toward the corner 22a. When the support member 4B is fixed to the housing 2, the protruding portion 44B is spaced apart from the corner 22a.

[0132] The protruding portion 44C is provided so as to protrude outward from the corner between the end 41c and the end 41e of the flat plate portion 41. That is, the protruding portion 44C protrudes from the corner of the flat plate portion 41 facing the corner 22d of the side wall member 22B toward the corner 22d. When the support member 4B is fixed to the housing 2, the protruding portion 44C is spaced apart from the corner 22d.

[0133] Bracket 5B is a member for fixing protrusion 44B and corner 22a to each other. Bracket 5C is a member for fixing protrusion 44C and corner 22d to each other. Brackets 5B and 5C have the same configuration as brackets 5 and 5A.

[0134] In the radiation imaging device 1B, the support member 4B is fixed to the corner portion 22a via the bracket 5B. More specifically, the shank of a screw S10 is inserted into a through-hole (not shown) provided in the wall portion 51 of the bracket 5B and threaded into a screw hole provided in the protrusion 44B, thereby fixing the bracket 5B and the protrusion 44B to each other. The shank of a screw S11 is inserted into the through-hole 222c and threaded into a screw hole provided in the wall portion 52 of the bracket 5B, thereby fixing the bracket 5B to the side wall portion 222 to each other. The shank of a screw S12 is inserted into the through-hole 221b and threaded into a screw hole provided in the wall portion 53 of the bracket 5B, thereby fixing the bracket 5B to the side wall portion 221 to each other.

[0135] In the radiation imaging device 1B, the support member 4B is fixed to the corner 22d via the bracket 5C. More specifically, the shank of the screw S13 is inserted into a through-hole provided in the wall 51 of the bracket 5C and threaded into a screw hole provided in the protrusion 44C, thereby fixing the bracket 5C and the protrusion 44C to each other. The shank of the screw S14 is inserted into the through-hole 221c and threaded into a screw hole provided in the wall 52 of the bracket 5C, thereby fixing the bracket 5C to the side wall 221 to each other. The shank of the screw S15 is inserted into the through-hole 223g and threaded into a screw hole provided in the wall 53 of the bracket 5C, thereby fixing the bracket 5C to the side wall 223 to each other. In this manner, the support member 4B is fixed to the corners 22a to 22d via the brackets 5, 5A to 5C. That is, in the radiation imaging apparatus 1B, each side of the support member 4B is not fixed to the side wall member 22B, but each corner of the support member 4B is fixed to each corner of the side wall member 22B.

[0136] 13 , the support member 4B has a side wall 43B having a configuration (shape, height, etc.) similar to that of the side wall 43, instead of the wall 421 (side wall 42). By providing such a side wall 43B, the strength of the support member 4B can be improved compared to a case in which the side wall 43B is not provided, and distortion can be suppressed. Note that while the side wall 43 is restricted by the need to avoid interference with the first flexible connecting member 10, the side wall 43B does not have such a restriction. Therefore, in order to further improve the strength of the support member 4B, the height of the side wall 43B may be made greater than that of the side wall 43. For example, the height of the side wall 43B may be the same as that of the wall 421.

[0137] In the radiation imaging device 1B described above, the same effects as those of the radiation imaging device 1 are achieved for the configuration common to the radiation imaging device 1 of the first embodiment, and the same effects as those of the radiation imaging device 1A of the second embodiment are achieved for the configuration common to the radiation imaging device 1A.

[0138] [Modifications] The present disclosure is not limited to the above-described embodiments. The materials and shapes of the above-described components are not limited to those described above, and various materials and shapes can be used. Furthermore, some of the components included in the above-described embodiments may be omitted or modified as appropriate. For example, while some characteristic components included in the above-described embodiments and some effects achieved by each component have been described, the radiation imaging device according to the present disclosure does not necessarily need to be configured to achieve all of the effects described in the above-described embodiments, and may be configured to achieve only some of the effects described in the above-described embodiments. In the latter case, the radiation imaging device only needs to include components essential for achieving at least some of the effects, and components that are not essential for achieving some of the effects may be omitted or modified as appropriate. Below, some specific modifications of the radiation imaging device according to the present disclosure are illustrated.

[0139] In each of the above embodiments, the number of first wiring boards 6 is one and the number of second wiring boards 7 is one. However, the number of first wiring boards 6 and the number of second wiring boards 7 may be two or more. That is, the first wiring board 6 may be composed of multiple wiring boards, and the second wiring board 7 may also be composed of multiple wiring boards. For example, the first wiring board 6 and the second wiring board 7 may be arranged as shown in (a) to (c) of FIG. 14. Note that in (a) of FIG. 14, multiple first flexible connecting members 10 are arranged along the Y-axis direction on one side in the X-axis direction (the lower side in the figure), and some of the first flexible connecting members 10 arranged in the central portion in the Y-axis direction are not shown. Furthermore, multiple second flexible connecting members 11 are arranged along the X-axis direction on both sides in the Y-axis direction, and some of the second flexible connecting members 11 arranged in the central portion in the X-axis direction are not shown. 14(b) and 14(c), similarly to FIG. 14(a), some of the first flexible connecting members 10 and some of the second flexible connecting members 11 are omitted from the illustration.

[0140] 14A, the second wiring board 7 may include second wiring boards 7A and 7B. The second wiring board 7A is disposed on one side in the Y-axis direction (the left side in the figure), and the second wiring board 7B is disposed on the other side in the Y-axis direction (the right side in the figure). The second wiring boards 7A and 7B are connected to the detection panel 3 by second flexible connecting members 11. The second wiring boards 7A and 7B are connected to the first wiring board 6 by two third flexible connecting members 12. When viewed from the Z-axis direction, at least a portion of the first wiring board 6 overlaps with the second wiring boards 7A and 7B. When the first wiring board 6 and the second wiring board 7 are disposed as described above, the flexible connecting members pass along the sides of three sides of the support member 4, and therefore this arrangement method can be applied to, for example, the radiation imaging devices 1A and 1B.

[0141] As shown in FIG. 14B , the first wiring board 6 may include first wiring boards 6A, 6B, and 6C. The first wiring board 6A is disposed on one side (the upper side in the figure) in the X-axis direction, the first wiring board 6B is disposed on the other side (the lower side in the figure) in the X-axis direction, and the first wiring board 6C is disposed between the first wiring boards 6A and 6B in the X-axis direction. The first wiring boards 6A and 6B are connected to the detection panel 3 by first flexible connecting members 10. An FPGA 63 is mounted on the first wiring board 6C. The first wiring boards 6A and 6B are connected to the first wiring board 6C by two fourth flexible connecting members 14. Signals read out by the detection panel 3 are input from the detection panel 3 to the first wiring boards 6A and 6B, and the signals are input to the first wiring board 6C via the fourth flexible connecting members 14. The fourth flexible connecting member 14 may be, for example, a flexible flat cable or a flexible substrate, similar to the third flexible connecting member 12. The first wiring boards 6A and 6B function as front boards. The second wiring board 7 is disposed on one side in the Y-axis direction (the right side in the figure) and is connected to the detection panel 3 by the second flexible connecting member 11. The second wiring board 7 is connected to the first wiring board 6C by the third flexible connecting member 12. When viewed from the Z-axis direction, at least a portion of the first wiring board 6A overlaps with the second wiring board 7, and at least a portion of the first wiring board 6B overlaps with the second wiring board 7. When the first wiring board 6 and the second wiring board 7 are disposed as described above, the flexible connecting members pass along the sides of three sides of the support member 4, and this arrangement method can be applied to, for example, the radiation imaging devices 1A and 1B.

[0142] As shown in FIG. 14C, the first wiring board 6 may include first wiring boards 6A, 6B, and 6C, and the second wiring board 7 may include second wiring boards 7A and 7B. The first wiring boards 6A to 6C are arranged in the same positions as the first wiring boards 6A to 6C shown in FIG. 14B. The second wiring board 7A is arranged on one side in the Y-axis direction (the left side in the figure), and the second wiring board 7B is arranged on the other side in the Y-axis direction (the right side in the figure). The second wiring boards 7A and 7B are connected to the detection panel 3 by second flexible connecting members 11. The second wiring boards 7A and 7B are connected to the first wiring board 6C by two third flexible connecting members 12. When viewed in the Z-axis direction, at least a portion of the first wiring board 6A overlaps with the second wiring board 7A, and at least a portion of the first wiring board 6A overlaps with the second wiring board 7B. When viewed from the Z-axis direction, at least a portion of the first wiring board 6B overlaps with the second wiring board 7A, and at least a portion of the first wiring board 6B overlaps with the second wiring board 7B. When the first wiring board 6 and the second wiring board 7 are arranged as described above, the flexible connecting members pass along the sides of the four sides of the support member 4, and therefore this arrangement method can be applied to, for example, the radiation imaging device 1B.

[0143] In the above-described embodiments, the first wiring board 6 and the second wiring board 7 are fixed to the rear surface 41 b, but the first wiring board 6 and the second wiring board 7 may be disposed in a position facing the rear surface 41 b. For example, the first wiring board 6 and the second wiring board 7 may be fixed to a side surface of the support member 4 (a surface facing the sidewall member 22).

[0144] In each of the above embodiments, the second wiring board 7 was arranged between the first wiring board 6 and the back surface 41b in the Z-axis direction, but the first wiring board 6 may also be arranged between the second wiring board 7 and the back surface 41b in the Z-axis direction.

[0145] In each of the above embodiments, the second wiring board 7 was fixed to the back surface 41b via the protective film 8 arranged between the second wiring board 7 and the back surface 41b, but the second wiring board 7 may also be fixed to the back surface 41b via another intervening member such as a washer instead of the protective film 8.

[0146] In the above embodiments, the wall portions 421, 422 extend from the ends 41c, 41d of the flat plate portion 41 along the Z-axis direction, but the wall portions 421, 422 may be provided upright relative to the flat plate portion 41 at positions more inward than the ends of the flat plate portion 41. Furthermore, in the above embodiments, the wall portions 421, 422 extend toward the bottom portion 23, but the wall portions 421, 422 may extend toward the lid portion 21.

[0147] In the above-described embodiments, the lid portion 21, the sidewall member 22, and the bottom portion 23 are formed as separate bodies, but the lid portion 21, the sidewall member 22, and the bottom portion 23 do not have to be formed as separate bodies. For example, the sidewall member 22 and the bottom portion 23 may be formed as a single body.

[0148] Furthermore, wall portions (e.g., wall portions similar to the side wall portions 43 formed by bending) extending in a direction perpendicular to the flat plate portion 41 may also be provided at the ends 41c, 41d, 41f, and 41e of the support member 4 that do not require the provision of wall portions for screwing to the side wall member 22. For example, the wall portion as described above may be provided at the end 41d of the support members 4A and 4B (see FIGS. 12 and 13). From the viewpoint of effectively suppressing a decrease in strength and distortion of the support member 4, it is preferable to provide wall portions as described above on multiple sides of the support member 4.

[0149] The first wiring board 6 and the second wiring board 7 may be configured as a single wiring board (for example, a single board on which the electronic components of both the first wiring board 6 and the second wiring board 7 are mounted). In this case, it becomes impossible to obtain the effects (for example, suppression of an increase in dimensions in a plan view, reduction in the cost of the wiring boards, etc.) that are obtained by adopting a configuration in which the wiring boards are separated into a plurality of wiring boards 6 and 7 as in the above embodiment, but it is possible to obtain the effects based on other configurations of the radiation imaging device 1.

[0150] In the above embodiments, the first wiring board 6 is positioned relative to the rear surface 41 b of the support member 4 by inserting the positioning pin 46 a into the through hole 6 e provided in the first wiring board 6, but a similar positioning mechanism may be applied to the second wiring board 7. For example, in cases such as when the second wiring board 7 is disposed at a position separated from the rear surface 41 b, the second wiring board 7 may be positioned relative to the rear surface 41 b of the support member 4 by inserting the positioning pin into the through hole provided in the second wiring board 7.

[0151] DESCRIPTION OF SYMBOLS 1, 1A, 1B...radiation imaging device, 2...housing, 3...detection panel, 4, 4A, 4B...support member, 5, 5A to 5C...bracket, 6...first wiring board (wiring board), 10...first flexible connecting member (flexible connecting member), 21...lid portion, 22, 22A, 22B...side wall member, 22a...corner portion, 22b...corner portion (first corner portion), 22c...corner portion (second corner portion), 22d...corner portion, 23...bottom portion, 41...flat plate portion (first portion), 41a...support surface, 41b...back surface, 41c...end portion, 41d...end portion, 41e...end portion (second end portion), 41f...end portion (first end portion), 42...side wall portion (second portion), 43...side wall portion (third portion), 221...side wall portion (first side wall portion), 222...side wall portion (second side wall portion), 223...side wall portion (third side wall portion), 224...side wall portion (fourth side wall portion), 421...wall portion (first fixing portion), 422...wall portion (second fixing portion), L1, L2, L3...length, T1...thickness.

Claims

1. A radiation imaging apparatus comprising: a detection panel that detects radiation; a first portion extending along a plane orthogonal to a first direction orthogonal to the detection panel, and a second portion extending from the first portion along the first direction and integrally formed with the first portion; a support member that supports the detection panel; a wiring board to which a signal read out from the detection panel is input; and a housing that houses the detection panel, the support member, and the wiring board and has a side wall member extending along the first direction, wherein the support member is fixed to the housing by screwing the second portion and the side wall member, and a length of the second portion along the first direction is longer than a thickness of the first portion along the first direction.

2. The radiation imaging apparatus according to claim 1, wherein the thickness of the first portion along the first direction is 3 mm or less.

3. The radiation imaging apparatus according to claim 1 or 2, wherein the length of the second portion along the first direction is 9 mm or more.

4. The radiation imaging apparatus according to any one of claims 1 to 3, wherein the length of the second portion along the first direction is three times or more the thickness of the first portion along the first direction.

5. The radiation imaging apparatus according to any one of claims 1 to 4, wherein the second portion extends along the first direction from an end of the first portion.

6. The radiation imaging apparatus according to any one of claims 1 to 5, wherein the housing further has a lid portion and a bottom portion that face each other in the first direction and are connected to each other by the side wall member, and the lid portion, the side wall member, and the bottom portion are each formed as a separate body.

7. The radiation imaging apparatus according to any one of claims 1 to 6, wherein the side wall member has a first side wall portion extending along a second direction orthogonal to the first direction, and the support member is fixed to the housing by screwing the second portion and the first side wall portion at two or more locations.

8. The side wall member has a first side wall portion extending along a second direction orthogonal to the first direction, and a second side wall portion extending along a third direction orthogonal to the first direction and intersecting the second direction and connected to the first side wall portion. The second portion has a first fixing portion facing the first side wall portion and a second fixing portion facing the second side wall portion. The support member is fixed to the housing by screwing the first fixing portion and the first side wall portion together and screwing the second fixing portion and the second side wall portion together. The radiation imaging apparatus according to any one of claims 1 to 7.

9. The side wall member further has a third side wall portion connected to the first side wall portion so as to face the second side wall portion, and a fourth side wall portion connected to the second side wall portion and the third side wall portion so as to face the first side wall portion. The support member is screwed to a corner portion of the side wall member formed by the third side wall portion and the fourth side wall portion. The radiation imaging apparatus according to claim 8.

10. The housing and the support member further include a bracket formed separately. The support member is screwed to the corner portion of the side wall member via the bracket. The radiation imaging apparatus according to claim 9.

11. The side wall member has a first side wall portion extending along a second direction orthogonal to the first direction, a second side wall portion extending along a third direction orthogonal to the first direction and intersecting the second direction and connected to the first side wall portion, a third side wall portion connected to the first side wall portion so as to face the second side wall portion, and a fourth side wall portion connected to the second side wall portion and the third side wall portion so as to face the first side wall portion. A first corner portion of the side wall member is formed by the second side wall portion and the fourth side wall portion. A second corner portion of the side wall member is formed by the third side wall portion and the fourth side wall portion. The support member is fixed to the housing by screwing the second portion and the first side wall portion together and screwing the first corner portion and the second corner portion and the support member together. The radiation imaging apparatus according to any one of claims 1 to 10.

12. The side wall member further includes a third side wall portion connected to the first side wall portion so as to face the second side wall portion, and a fourth side wall portion connected to the second side wall portion and the third side wall portion so as to face the first side wall portion. The support member extends along the first direction from at least one of a first end portion of the first portion facing the fourth side wall portion and a second end portion of the first portion facing the third side wall portion, and further has a third portion integrally formed with the first portion. The radiation imaging apparatus according to any one of claims 8 to 10.

13. The radiation imaging apparatus according to claim 12, further comprising a flexible connection member connecting the detection panel and the wiring board. The first portion has a support surface facing the detection panel and a back surface opposite to the support surface. The wiring board is disposed at a position facing the back surface. The length of the third portion along the first direction is shorter than the length of the second portion along the first direction. When viewed from the first direction, the flexible connection member passes through the side of the third portion.

Images