JP2013002828A - Radiation imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiation imaging device which reduces the weight of the whole device through balanced mechanical strength with reduced materials and prevents image unevenness of a radiation image resulting from heat conducted from the outside.SOLUTION: A radiation imaging device 20A includes a chassis body part 30 formed of fiber-reinforced plastic, a fiber 90 composing the fiber-reinforced plastic which is arranged at least on a top plate 35 along the direction crossing the axial direction of the chassis body part 30, and connection members 122 and 126 which extend along the axial direction viewing from an incident radiation direction and is connected to the side part of a radiation conversion panel 116 crossing in the axial direction.

Description

  The present invention relates to a radiation imaging apparatus in which a radiation conversion panel that converts radiation into a radiation image is accommodated in a housing.

  Conventionally, in a radiation imaging apparatus in which a radiation conversion panel for converting radiation into a radiation image is accommodated in a casing, the casing is made of fiber reinforced plastic (FRP), thereby improving the mechanical strength of the casing. I try to improve. For example, Patent Document 1 discloses a carbon fiber reinforced plastic (CFRP) including a carbon fiber group in which a bundle of carbon fibers arranged in one direction and a bundle of other carbon fibers arranged in a direction orthogonal to the bundle are knitted. It has been proposed to construct a housing using

JP 2010-243564 A

  By the way, when a casing is configured by a cylindrical casing main body and a lid member that closes the opening of the casing main body, when the load is applied to the casing main body from the outside, the opening is The housing body may be deformed so as to be bent and crushed, and the mechanical strength of the housing body in the bending direction (the direction in which the housing body is crushed by receiving the load) may be reduced.

  In the technology of Patent Document 1, a carbon fiber group composed of a bundle of carbon fibers in two directions orthogonal to each other is arranged uniformly over the entire casing, whereby the mechanical strength in the bending direction is improved while the mechanical strength is increased. The mechanical strength is increased more than necessary even in the direction sufficiently secured originally. As described above, in the technique of Patent Document 1, the carbon fiber group is unnecessary in the housing body so as to increase the mechanical strength more than necessary even in the direction in which the mechanical strength is originally secured. Has been placed. As a result, the weight of the entire radiation imaging apparatus including the housing increases.

  In addition to the radiation conversion panel, a circuit board on which electronic components that process electrical signals corresponding to the radiation image are mounted, and a connection member that electrically connects the radiation conversion panel and the circuit board are also provided in the housing. Contained.

  Here, when the subject is irradiated with radiation while the subject is in contact with the top plate of the housing body, the radiation transmitted through the subject reaches the outer surface (irradiation surface) of the top plate, The radiation transmitted through the top plate is converted into a radiation image by the radiation conversion panel. In this case, when heat is transmitted from the subject to the radiation conversion panel via the top plate, there is a possibility that image unevenness occurs in the radiation image due to the heat.

  Therefore, in order to avoid the occurrence of the image unevenness, when the heat is released to the outside through the housing, the connecting member, the electronic component, and the circuit board are disposed in the direction of releasing the heat. When the electrical signal is output from the radiation conversion panel to the circuit board via the connection member, or when the electrical signal is processed in the electronic component, the radiation image is caused by the heat lost. There is a concern that image unevenness occurs.

  The present invention has been made in order to solve the above-mentioned problems, and realizes a reduction in the weight of the entire apparatus by balancing the mechanical strength with less material, and at the same time, radiation images resulting from heat transmitted from the outside. An object of the present invention is to provide a radiation imaging apparatus capable of preventing the occurrence of image unevenness.

In order to achieve the above object, a radiation imaging apparatus according to the present invention includes:
A radiation conversion panel that converts radiation into an electrical signal corresponding to a radiation image, a circuit board on which an electronic component that processes the electrical signal from the radiation conversion panel is mounted, and the radiation conversion panel and the circuit board are electrically connected A connection member that is electrically connected, and a housing that accommodates the radiation conversion panel, the electronic component, the circuit board, and the connection member and is capable of transmitting the radiation,
The casing is a cylindrical casing body formed with a hollow portion that can accommodate the radiation conversion panel, the electronic component, the circuit board, and the connection member, and an opening that communicates with the hollow portion; A lid member that closes the opening,
The housing body is made of fiber reinforced plastic,
Fibers constituting the fiber reinforced plastic are arranged along a direction intersecting the axial direction of the housing main body on the top plate having an irradiation surface irradiated with at least the radiation in the housing main body.
The connection member is characterized in that it is connected to a side portion of the radiation conversion panel that extends along the axial direction as viewed from the incident direction of the radiation and intersects the axial direction.

  In the radiation imaging apparatus, radiation imaging of the subject can be performed by irradiating the subject with the radiation while the subject is in contact with the top board. In this case, when a load is applied to the top plate from the subject, the housing main body portion is deformed so that the hollow portion and the opening portion are bent and crushed.

  Therefore, in the present invention, by arranging the fibers along at least the direction intersecting the axial direction in the top plate, the bending direction of the housing main body portion (the housing main body portion receiving the load is The mechanical strength in the crushing direction can be increased. As a result, as compared with the technique of Patent Document 1, it is possible to achieve a weight reduction of the entire apparatus by balancing the mechanical strength of the entire casing with a smaller amount of the fibers.

  Further, in a portable radiation imaging apparatus, if it is accidentally dropped or it is accidentally applied with an external impact, at least a part of the radiation imaging apparatus may be damaged. It is necessary to consider dropability and impact resistance.

  On the other hand, in the present invention, as described above, the fibers are arranged at least in the top plate in a direction intersecting the axial direction, thereby balancing the mechanical strength of the entire casing. Therefore, it is possible to improve the drop resistance and impact resistance when the radiation imaging apparatus is configured as a portable apparatus.

  In the technique of Patent Document 1, a casing is configured by uniformly arranging a bundle of carbon fibers in two orthogonal directions, and heat from the subject travels along the two directions through the bundle of carbon fibers. Therefore, it is not easy to secure the location of the connection member, the electronic component, and the circuit board in the casing.

  On the other hand, in the present invention, the fiber arrangement direction (the intersecting direction) and the connection member arrangement direction (the axial direction) are set to different directions, and the axis of the radiation conversion panel is set. The connecting member is connected to a side portion that intersects the direction. Thereby, the heat transmitted from the subject to the top plate escapes along the arrangement direction of the fibers, while the electrical signal converted from the radiation by the radiation conversion panel is connected along the axial direction. The signal is output to the circuit board via the member.

  As a result, it is possible to prevent the occurrence of image unevenness in the radiation conversion panel due to the heat. In addition, since the connection member is not arranged in the direction of releasing the heat (the intersecting direction that is the arrangement direction of the fibers), the escaped heat is transmitted to the connection member, the electronic component, and the circuit board. Can be avoided. Therefore, when the electrical signal is output from the radiation conversion panel to the circuit board via the connection member, or when the electrical signal is processed in the electronic component, the radiation is caused by the heat that has been lost. It is possible to prevent image unevenness from occurring in an image.

  As described above, according to the present invention, it is possible to reduce the overall weight of the radiation imaging apparatus by balancing the mechanical strength with less material, and to reduce image unevenness in the radiation image due to heat transmitted from the outside. Occurrence can be prevented.

  Here, if the fiber reinforced plastic is a carbon fiber reinforced plastic (CFRP) and the carbon fiber is disposed along the direction intersecting the axial direction, the main body is made of a CFRP casing which has been generally used conventionally. The invention can be easily applied.

  Further, at least the top plate of the casing main body may be configured by stacking a plurality of prepregs containing the carbon fibers in the thickness direction of the top plate. Thereby, the carbon fibers can be easily arranged in a direction intersecting with the axial direction.

  In this case, if the carbon fibers contained in at least the prepreg of the outermost layer are arranged in a direction substantially orthogonal to the axial direction, it is possible to avoid occurrence of the carbon fibers in the vicinity of the opening.

  Further, in each of the above inventions, at least the radiation conversion panel or the circuit board can be inserted into and removed from the hollow portion through the opening in the vicinity of the two opposing side plates of the casing main body portion in the hollow portion. You may arrange | position each guide member to perform. Thereby, replacement | exchange of the said radiation conversion panel, the said electronic component, or the said circuit board can be performed easily.

  Further, if each of the guide members is in contact with the two side plates of the casing main body and extends along the axial direction, the thickness of the casing is reduced to reduce the machine of the entire casing. Even when the mechanical strength decreases, the drop resistance and impact resistance can be compensated.

  Further, in the casing, the radiation conversion panel is disposed on one surface on the top plate side, and a power supply unit for driving the circuit board and the radiation imaging apparatus on the other surface on the bottom plate side of the casing main body portion A base on which is placed may be further accommodated. In this case, if each guide member is formed with a groove along the axial direction, and both side portions of the base are respectively inserted into the grooves, the base can slide along the axial direction. . Thereby, the said base, the said radiation conversion panel, the said electronic component, and the said circuit board are comprised integrally as an assembly (ASSY), and this assembly can be easily taken in and out of the said hollow part through the said opening part. It becomes possible.

  If each guide member is a conductive member, the thermal conductivity is also good, and the heat generated in the radiation conversion panel, the electronic component, and the circuit board is transferred to the housing body through the guide members. Therefore, it is possible to further suppress the occurrence of image unevenness in the radiation image.

  Further, if at least a part of each of the guide members is formed as a shock absorbing member that absorbs an impact, the impact resistance can be further improved. Specifically, in each of the guide members, if the portion including the groove is made of a heat conductive resin (for example, a resin containing a filler) or a metal, and the other portion is made of a heat conductive rubber, The impact resistance can be improved without impairing the sliding performance of the base along the groove and the heat transfer function from the base to each guide member. In this case, if the portion including the groove is made of a heat conductive resin, each of the guide members functions as a buffer member as a whole, while the portion including the groove is made of a metal. The heat conductive rubber portion functions as a buffer member.

  According to the present invention, it is possible to reduce the overall weight of the radiation imaging apparatus by balancing the mechanical strength with less material, and to prevent occurrence of image unevenness in the radiation image due to heat transmitted from the outside. it can.

1 is a configuration diagram of a radiation imaging system to which an electronic cassette according to a first embodiment is applied. It is a perspective view of the electronic cassette of FIG. It is a disassembled perspective view of the housing | casing of FIG. It is sectional drawing along the IV-IV line of FIG. It is sectional drawing along the VV line of FIG. It is sectional drawing along the VI-VI line of FIG. FIG. 7A is an explanatory diagram schematically illustrating a state of the casing main body that is not subjected to a load from the outside, and FIG. 7B is an explanatory diagram schematically illustrating a state of the casing main body that is loaded from the outside. . FIG. 4 is a schematic plan view of a housing illustrating the arrangement of carbon fibers in the top plate, the direction in which heat transmitted from the subject escapes, and the supply direction of control signals and charge signals. It is explanatory drawing which shows typically the top plate comprised by laminating | stacking several prepreg. It is a block diagram of the electronic cassette of FIG. 2 is a flowchart for explaining imaging of a subject using the electronic cassette of FIG. 1. It is sectional drawing of the electronic cassette concerning 2nd Embodiment. FIG. 13 is a schematic plan view of a housing illustrating the arrangement of carbon fibers in the top plate, the direction in which heat transmitted from a subject escapes, and the supply direction of control signals and charge signals in the electronic cassette of FIG. 12. It is sectional drawing which shows the other structure of the electronic cassette of FIG.

  A preferred embodiment of a radiation imaging apparatus according to the present invention will be described below in detail with reference to FIGS.

[Configuration of First Embodiment]
First, an electronic cassette 20A as a radiation imaging apparatus according to the first embodiment will be described with reference to FIGS.

  FIG. 1 is a configuration diagram of a radiation imaging system 10 to which an electronic cassette 20A according to the first embodiment is applied.

  The radiation imaging system 10 detects a radiation source 18 that irradiates radiation 16 and a radiation 16 that has passed through the subject 14 and converts it to a radiation image for a patient who is a subject 14 lying on an imaging table 12 such as a bed. An electronic cassette 20A, a console 22 that controls the radiation source 18 and the electronic cassette 20A, and a display device 24 that displays a radiation image are provided.

  Between the console 22, the electronic cassette 20A, and the display device 24, for example, UWB (Ultra Wide Band), IEEE802.60. Signals are transmitted / received by wireless LAN (Local Area Network) such as a / b / g / n or wireless communication using millimeter waves or the like. Note that signals may be transmitted and received by wired communication using a cable.

  The console 22 is connected to a radiology information system (RIS) 26 that centrally manages radiographic images and other information handled in the radiology department in the hospital. The RIS 26 is used to comprehensively manage medical information in the hospital. A medical information system (HIS) 28 to be managed is connected.

  FIG. 2 is a perspective view of the electronic cassette 20A shown in FIG.

  The electronic cassette 20 </ b> A is a portable radiation imaging apparatus having a substantially rectangular (hexahedron) casing 29 disposed between the imaging table 12 and the subject 14.

  The housing 29 is a monocoque housing having a hollow rectangular tube-shaped housing main body (housing main body portion) 30 and two lid members 32 and 34 that close the opening of the housing main body 30 from both sides. The entire housing 29 receives a stress from the outside (for example, a drop of the housing 29, a load from the subject 14, an impact from the outside). The housing 29 (the housing main body 30 and the lid members 32 and 34) is made of carbon fiber reinforced plastic (CFRP) that can transmit the radiation 16.

  The upper surface of the housing 29 on which the subject 14 lies is an irradiation surface 36 to which the radiation 16 is irradiated. A guide line 38 indicating the imaging region and imaging position of the subject 14 is formed on the irradiation surface 36, and an outer frame of the guide line 38 is an imageable region 40 indicating the maximum irradiation range (irradiation field) of the radiation 16. Yes. Further, the center position of the guide line 38 (intersection of two guide lines 38 intersecting in a cross shape) is the center position of the imageable area 40.

  As shown in FIGS. 2 and 3, among the four side surfaces 42 a to 42 d constituting the housing body 30, the hollow portion 41 is formed along the x direction between the side surface 42 a and the side surface 42 b, thereby An opening 44a that communicates with the hollow portion 41 is formed in 42a, and an opening 44b that communicates with the hollow portion 41 is formed on the side surface 42b. That is, the top plate 35 having the irradiation surface 36, the bottom plate 53 having the bottom surface 47, the side plate 49 having the side surface 42a, and the side plate 51 having the side surface 42d constitute the rectangular tube-shaped housing body 30. A hollow portion 41 extending in the x direction is formed inside.

  The casing 29 is configured by closing the opening 44 a with the lid member 32 and closing the opening 44 b with the lid member 34. Therefore, the housing 29 includes the irradiation surface 36, the side surface 52 of the lid member 32, the side surface 81 of the lid member 34, the two side surfaces 43 and 45 including the two side surfaces 42c and 42d of the housing body 30, and the housing body. It is configured as a hexahedron having a bottom surface 46 including 30 bottom surfaces 47.

  On the side surface 52 on the x2 direction side of the lid member 32, a power switch 54 for starting the electronic cassette 20A, a display 56 for displaying various information, an input terminal 58 of an AC adapter for charging from outside, an external device and Displays a USB (Universal Serial Bus) terminal 60 as an interface means capable of sending and receiving information between the card, a card slot 64 for loading a memory card 62 such as a PC card, and various statuses of the electronic cassette 20A. An indicator 66 such as an LED is provided.

  In the electronic cassette 20A, the indicator 66 and the display 56 are disposed. However, the display 66 can substitute for the display function of the indicator 66, so that the indicator 66 can be eliminated. Moreover, the display 56 can be made unnecessary by the indicator 66 acting as a part of the display function on the display 56.

  The lid member 32 includes a side surface 52 and a power source switch 54, a display 56, an input terminal 58, a USB terminal 60, a card slot 64, and an indicator 66, and a lid body 68 on the x1 direction side of the lid body 68. The insertion portion 70 is formed and can be fitted into the opening portion 44a, and the engagement piece 72 protrudes from both ends along the y direction of the insertion portion 70 toward the opening portion 44a. Further, on the outer side surfaces of the two engaging pieces 72 (on the left engaging piece 72 in FIG. 3, the side surface in the y1 direction and on the right engaging piece 72 the side surface in the y2 direction), an engaging convex portion 74 is formed. On the opening 44a side of the inner wall of the housing body 30, an engagement recess 76 that can be engaged with the engagement projection 74 is formed.

  Accordingly, the lid member 32 is advanced in the x1 direction, the opening 44a and the insertion portion 70 are fitted, and the engagement convex portions 74 of the two engagement pieces 72 that have entered the hollow portion 41 of the housing body 30. When the engagement recess 76 is engaged, the opening 44 a is closed by the lid member 32, and the lid member 32 and the housing body 30 can be integrated.

  On the other hand, the lid member 34 has substantially the same configuration as the lid member 32 described above except that the power switch 54, the display 56, the input terminal 58, the USB terminal 60, the card slot 64, and the indicator 66 are not provided. is there. That is, the lid member 34 is formed on the x2 direction side of the lid main body 80 and the lid main body 80 having substantially the same shape as the lid main body 68 and having the side surface 81 in the x1 direction facing the side surface 52, and is formed in the opening 44b. The insertion portion 82 can be fitted, and the engagement piece 84 protrudes from both ends of the insertion portion 82 along the y direction toward the opening 44b. Further, the engaging protrusions 86 are also formed on the outer surfaces of the two engaging pieces 84 (the side surface in the y1 direction in the left side engaging piece 84 and the side surface in the y2 direction in the right side engaging piece 84 in FIG. 3). An engagement recess 88 that can engage with the engagement protrusion 86 is formed on the inner wall 44 of the housing body 30 on the opening 44b side.

  Accordingly, as in the case of the lid member 32, the lid member 34 is advanced in the x2 direction, the opening 44b and the insertion portion 82 are fitted, and the two engagements that have entered the hollow portion 41 of the housing body 30 are obtained. When the engaging projection 86 and the engaging recess 88 of the joining piece 84 are engaged with each other, the opening 44b is closed by the lid member 34, and the lid member 34 and the housing body 30 can be integrated.

  4 to 6 are cross-sectional views of the electronic cassette 20 </ b> A illustrating the inside of the housing 29.

  A chamber 110 that is a hollow portion 41 is formed in the housing 29 by closing the openings 44 a and 44 b of the housing body 30 with the two lid members 32 and 34, respectively.

  A base 112 is disposed at the center of the chamber 110, and the surface 114 of the base 112 (the surface on the top plate 35 side having the irradiation surface 36) is transmitted through the top plate 35 side of the housing body 30. A radiation conversion panel 116 for converting the radiation 16 incident on 110 into a radiation image is disposed. The radiation conversion panel 116 is desirably large enough to correspond to the imageable region 40 (see FIGS. 2 and 3).

The radiation conversion panel 116 includes a scintillator 118 that converts the radiation 16 into electromagnetic waves of other wavelengths such as visible light, and a so-called photoelectric conversion layer 120 that converts the electromagnetic waves converted by the scintillator 118 into electric signals. This is an indirect conversion type radiation detector. As shown in FIGS. 5 and 6, the radiation conversion panel 116 is a surface reading method in which a photoelectric conversion layer 120 and a scintillator 118 are sequentially arranged with respect to the top plate 35 along the irradiation direction of the radiation 16. ISS (Irradiation Side Sampling) type radiation detector. As the scintillator 118, for example, a scintillator made of cesium iodide (CsI) or gadolinium oxide sulfide (Gd ₂ O ₂ S: Tb (GOS)) may be used.

  A plurality of flexible substrates (connection members) 122 for supplying a control signal for driving the photoelectric conversion layer 120 to the photoelectric conversion layer 120 are provided on the side surface in the x2 direction of the radiation conversion panel 116 (the photoelectric conversion layer 120 thereof). The driving ICs 124 that generate the control signals are arranged on the respective flexible substrates 122 at predetermined intervals. On the other hand, on the side surface in the x1 direction of the radiation conversion panel 116 (the photoelectric conversion layer 120 thereof), a plurality of flexible substrates (for reading out electric signals corresponding to the radiation image from the photoelectric conversion layer 120 driven by the supply of the control signal). Connecting members) 126 are arranged at predetermined intervals, and each flexible substrate 126 is provided with a reading IC 128 that reads out the electric signal and performs predetermined signal processing.

  A power supply unit 94 and a plurality of circuit boards 130 are attached to the back surface 129 of the base 112 (the surface on the bottom surface 46 side of the housing 29), and an electronic component 132 is disposed on each circuit board 130. . As shown in FIG. 5, flexible boards 122 and 126 are connected to the two circuit boards 130. The base 112 is supported at the center of the chamber 110 by a support member (not shown). Further, in order to prevent the power supply unit 94, the circuit board 130, and the electronic component 132 from being deteriorated due to the irradiation of the radiation 16, the base 112 may be formed of a lead plate capable of shielding the radiation 16, or It may be configured to include lead.

  Here, the configuration of the housing body 30, particularly the configuration of the top plate 35, will be described with reference to FIGS. 7A to 9.

  As described above, the housing 29 is made of CFRP that can transmit the radiation 16. In this case, as shown in FIGS. 7A to 8, the top plate 35 has carbon fibers 90 extending along the y direction orthogonal to the axial direction (x direction) of the rectangular tubular housing body 30. They are stacked along the thickness direction (z direction) of the plate 35. The carbon fibers 90 are desirably arranged at predetermined intervals along the x direction.

  Since the top plate 35 is a part of the housing body 30, the carbon fiber 90 may actually be disposed in the top plate 35, the side plates 49 and 51, and the bottom plate 53 so as to surround the chamber 110. desirable. That is, FIGS. 7A and 7B show only the case where the carbon fibers 90 are linearly arranged in the top plate 35. The carbon fibers 90 are actually arranged so as to surround the chamber 110. ing. The CFRP constituting the housing body 30 is formed by hardening the periphery of the carbon fiber 90 that can transmit the radiation 16 with a plastic such as an epoxy resin that can transmit the radiation 16.

  Here, the arrangement of the carbon fibers 90 in the housing body 30 may be as follows.

  For example, as shown in FIG. 9, at least for the top plate 35, prepregs 35a to 35d containing carbon fibers 90 are stacked in the thickness direction (z direction) of the top plate 35, and these prepregs 35a to 35d are pressurized. Alternatively, the top plate 35 on which the carbon fibers 90 extending in the y direction are arranged may be configured by heating and integration.

  Of course, each of the prepregs 35a to 35d is formed by hardening the periphery of the carbon fiber 90 with a plastic material such as an epoxy resin. In FIG. 9, as an example, four prepregs 35a to 35d are laminated. The case where the top plate 35 is configured is shown.

  Further, when the entire housing body 30 is constituted by a prepreg, the plurality of prepregs 35a to 35d are wound in a ring shape, and then the prepregs 35a to 35d are integrated by being pressurized or heated to be integrated. Can be configured.

  In the first embodiment, as shown in FIG. 7A, since the carbon fibers 90 in the top plate 35 extend along the y direction, the subject 14 is irradiated with the top plate 35 (at the time of radiography). If a load is applied to the top plate 35 from the subject 14 in contact with the surface 36), the housing body 30 is deformed so that the hollow portion 41 and the openings 44a and 44b are bent and crushed as shown in FIG. 7B. .

  In this case, since the carbon fibers 90 are arranged in the top plate 35 along the y direction orthogonal to the x direction, which is the axial direction of the housing main body 30, the bending direction of the housing main body 30 (under the load, the housing main body 30 receives the load). The mechanical strength with respect to the z1 direction) is increased, and as a result, the mechanical strength of the entire housing 29 can be increased.

  Further, when the subject 14 comes into contact with the top plate 35, the heat of the subject 14 is transmitted to the top plate 35. However, the heat travels through the carbon fiber 90 and escapes in the heat transfer directions indicated by H1 and H2 in FIG. Heat is dissipated to the outside. Therefore, the heat transfer to the radiation conversion panel 116 can be avoided.

  Further, as shown in FIG. 8, each flexible substrate 122 that supplies a control signal to the photoelectric conversion layer 120 extends along the x direction orthogonal to the extending direction (y direction) of the carbon fiber 90 to thereby generate photoelectric. Each flexible substrate 126 that is connected to the side portion of the conversion layer 120 in the x2 direction and reads an electric signal from the photoelectric conversion layer 120 extends along the x direction, thereby connecting to the side portion of the photoelectric conversion layer 120 in the x1 direction. Is done.

  Therefore, the supply direction Sg of the control signal and the readout direction So of the electrical signal and the heat transfer directions H1 and H2 are different from each other. That is, in the electronic cassette 20A, the flexible substrates 122 and 126 are not arranged along the heat transfer directions H1 and H2, and therefore the heat is transmitted through the flexible substrates 122 and 126 and the driving IC 124 and Transmission to the reading IC 128, the circuit board 130, the electronic component 132, and the power supply unit 94 can be avoided.

  In the present embodiment, in the electronic cassette 20A, heat from the subject 14 is generated by the radiation conversion panel 116, the flexible boards 122 and 126, the driving IC 124, the reading IC 128, the circuit board 130, the electronic component 132, and the power supply unit 94. Therefore, the top plate 35 may be configured as follows.

  (1) The number of prepregs (prepregs 35a to 35d) constituting the top plate 35 is made larger than the number of prepregs stacked on the bottom plate 53 and the side plates 49 and 51.

  (2) Among the plurality of prepregs constituting the top plate 35, at least for the outermost prepreg (prepreg 35a), the arrangement direction of the carbon fibers 90 is the y direction.

  FIG. 10 is a block diagram of the electronic cassette 20A.

  The photoelectric conversion layer 120 includes, as a switching element, a photoelectric conversion element 140 such as a pin-type photodiode or a phototransistor that can store radiation 16 (see FIGS. 1, 2, 5, and 6) by converting it into charges. Thin film transistor (TFT) 142. Note that FIG. 10 illustrates the case where the photoelectric conversion element 140 is a pin-type photodiode.

  In this case, in the photoelectric conversion layer 120, a plurality of signal lines 144 and gate lines 146 are arranged on one surface of a substrate made of glass or resin so as to intersect with each other, and are partitioned by each gate line 146 and each signal line 144. By providing the photoelectric conversion elements 140 and the TFTs 142 in the small areas, the plurality of photoelectric conversion elements 140 and the plurality of TFTs 142 are arranged in a two-dimensional matrix on the substrate. Further, one bias line 148 is connected to one photoelectric conversion element 140, and each bias line 148 is connected to a bias power source 172 through one connection 150.

  Here, the anode electrode of the photoelectric conversion element 140 is connected to the bias line 148, and the cathode electrode is connected to the source electrode S of the TFT 142. On the other hand, the gate electrode G of the TFT 142 is connected to the gate drive circuit 152 via the gate line 146, and the drain electrode D is connected to the signal readout circuit 154 via the signal line 144. In this case, the gate driving circuit 152 is a driving circuit unit for driving the radiation conversion panel 116 corresponding to the plurality of driving ICs 124, while the signal reading circuit 154 is a radiation corresponding to the plurality of reading ICs 128. It is a readout circuit unit that reads out an electrical signal corresponding to an image.

  The bias power source 172 applies a bias voltage (reverse bias voltage) in the reverse direction to each photoelectric conversion element 140 via the connection 150 and each bias line 148. In FIG. 10, since the bias line 148 is connected to the p-layer side of the pin type photoelectric conversion element 140 via the anode electrode, the bias power source 172 connects the wiring 150 and the anode electrode of the photoelectric conversion element 140. A negative voltage (which may be a voltage lower than the cathode electrode by a predetermined voltage or more) is applied as a reverse bias voltage via the bias line 148. When the bias line 148 is connected to the cathode electrode by forming the pin type stacking order of the photoelectric conversion element 140 in reverse (the photoelectric conversion element 140 is formed so that the polarity of the photoelectric conversion element 140 is reversed), From 172, a positive voltage (which is higher than the anode electrode by a predetermined voltage or higher) may be applied as a reverse bias voltage to the cathode electrode. In that case, the direction of connection of the photoelectric conversion element 140 to the bias power source 172 in FIG. 10 is reversed.

  When a signal readout voltage (control signal) is applied from the gate drive circuit 152 to the gate electrode G of the TFT 142 via the gate line 146, the gate of the TFT 142 opens, and the charge accumulated in the photoelectric conversion element 140, that is, An electric signal (radiation image signal) is read from the drain electrode D to the signal line 144 via the source electrode S of the TFT 142.

  In the signal readout circuit 154, an amplifier 160, a sample hold circuit 162, a multiplexer 164, and an AD converter 166 are sequentially connected to each signal line 144. Therefore, the electric signal read out through each signal line 144 is amplified by the amplifier 160 formed of a charge amplifier, sampled by the sample hold circuit 162, and then sequentially supplied to the AD converter 166 through the multiplexer 164. , Converted into a digital signal (digital value). The AD converter 166 sequentially outputs the electrical signal of each photoelectric conversion element 140 converted into a digital value to a cassette control unit 174 described later.

  The electronic cassette 20A has a control unit 170 for controlling the entire apparatus.

  In addition to the power switch 54, the display 56, the input terminal 58, the USB terminal 60, the card slot 64, the indicator 66, the power supply unit 94, and the bias power supply 172, the control unit 170 includes the radiation conversion panel 116, the gate drive circuit 152, and the signal. A cassette control unit 174 that controls the readout circuit 154 and the like, and a communication unit 176 that transmits and receives signals to and from the console 22 by wireless communication.

  The power supply unit 94 includes a power supply circuit 178 and a power supply 180. The power source 180 is a power storage means such as a battery or a capacitor (for example, an electric double layer capacitor). The power supply circuit 178 is a power conversion circuit such as a DC / DC converter that can convert the voltage of the power supply 180 into a desired voltage and supply it to each part in the electronic cassette 20A.

  The cassette control unit 174 is a computer including a microcomputer, and realizes various functions by a CPU (not shown) reading and executing a program recorded in a ROM.

  Specifically, the cassette control unit 174 includes an image memory 182 and a storage unit 186. The image memory 182 stores a radiation image acquired from the radiation conversion panel 116 via the signal readout circuit 154. The storage unit 186 stores cassette ID information for specifying the electronic cassette 20A.

  In the control unit 170, the bias power source 172, the cassette control unit 174, and the communication unit 176 are realized by the electronic component 132 mounted on the circuit board 130 described above.

[Operation of First Embodiment]
Next, operation | movement of the radiation imaging system 10 containing the electronic cassette 20A which concerns on 1st Embodiment is demonstrated according to the flowchart of FIG. In the description of the operation, the description will be given with reference to FIGS.

  First, in step S1, the user carries the electronic cassette 20A from a predetermined storage location such as a radiology department in a hospital to the imaging table 12 (see FIG. 1). In this case, the electronic cassette 20A is in a sleep state in which the power supply unit 94 (see FIGS. 5, 6, and 10) supplies power only to the cassette control unit 174, and only the cassette control unit 174 is operating. .

  Next, the user turns on the power switch 54 after placing the electronic cassette 20 </ b> A on the imaging table 12 with the irradiation surface 36 facing upward. Thereby, first, the cassette control unit 174 controls the power supply unit 94 so as to supply power to the display 56, the indicator 66, and the communication unit 176 in addition to the cassette control unit 174. As a result, the display 56 displays the activation of the electronic cassette 20A on the screen. The indicator 66 emits light indicating activation of the electronic cassette 20A by an LED or the like. The user can grasp that the electronic cassette 20 </ b> A is activated by visually recognizing the screen display of the display 56 or the light emission of the indicator 66. Further, the communication unit 176 can transmit and receive signals wirelessly with the console 22.

  Next, the user operates the console 22 to include imaging conditions such as subject information related to the subject 14 to be imaged (for example, the tube voltage and tube current of the radiation source 18 and the exposure time of the radiation 16). Register a shooting order. Note that when the number of images to be imaged, the imaging region, and the imaging method are determined in advance, the user registers these conditions in the imaging order. As described above, since the wireless transmission / reception of signals is possible between the console 22 and the communication unit 176, the cassette control unit 174 transmits the imaging order to the console 22 by wireless communication via the communication unit 176. In response to the request, the console 22 transmits the imaging order to the electronic cassette 20A by wireless communication in response to a transmission request from the electronic cassette 20A. The imaging order received by the communication unit 176 is stored in the storage unit 186.

  In the next step S2, the user and the electronic cassette 20A prepare for photographing.

  In this case, the cassette control unit 174 controls the power supply unit 94 so as to supply power to each unit in the electronic cassette 20A other than the display 56, the indicator 66, the cassette control unit 174, and the communication unit 176. As a result, the bias power source 172 that receives power supply from the power supply unit 94 applies a reverse bias voltage to each photoelectric conversion element 140, and each photoelectric conversion element 140 reaches a state where charges can be accumulated. The cassette control unit 174 controls the gate drive circuit 152 to turn off all the TFTs 142.

  On the other hand, the user adjusts the distance between the radiation source 18 and the radiation conversion panel 116 to the SID (distance between the source image reception images), arranges the subject 14 on the irradiation surface 36, and captures the imaging region of the subject 14. Is positioned so that the center position of the imaging region substantially coincides with the center position of the imageable area 40.

  In this case, since the subject 14 rides on the top plate 35 of the electronic cassette 20A from the top (lies on its side), as shown in FIG. 7B, a load in the z1 direction is applied from the subject 14 to the top plate 35. The housing body 30 is deformed so that the hollow portion 41 and the openings 44a and 44b are bent and crushed. However, since the carbon fiber 90 is disposed along the y direction on at least the top plate 35 that is deformed by the load in the housing body 30, the mechanical strength of the housing body 30 against the load can be increased.

  Further, the heat transmitted from the subject 14 to the top plate 35 escapes along the carbon fibers 90 in the heat transfer directions H1 and H2 in FIG. Therefore, the heat can be prevented from being transmitted to the radiation conversion panel 116 and the flexible substrates 122 and 126 connected to the side portions of the photoelectric conversion layer 120 in the x1 direction and the x2 direction, respectively.

  In step S3 after the preparation for imaging is completed in this way, the user turns on an exposure switch (not shown) provided in the console 22 or the radiation source 18. When the console 22 is provided with an exposure switch, the imaging conditions are transmitted from the console 22 to the radiation source 18 by wireless communication after the exposure switch is turned on. If the radiation source 18 is equipped with an exposure switch, after the exposure switch is turned on, transmission of imaging conditions is requested from the radiation source 18 to the console 22 by wireless communication. In response to a transmission request from the source 18, the imaging condition is transmitted to the radiation source 18 by wireless communication.

  When receiving the imaging condition, the radiation source 18 irradiates the subject 14 with the radiation 16 having a predetermined dose according to the imaging condition for a predetermined exposure time. The radiation 16 passes through the subject 14 and reaches the radiation conversion panel 116 in the housing body 30. In this case, the scintillator 118 emits visible light having an intensity corresponding to the intensity of the radiation 16, and each photoelectric conversion element 140 constituting the photoelectric conversion layer 120 converts the visible light into an electric signal and accumulates it as an electric charge ( Step S4).

  In the next step S <b> 5, the cassette control unit 174 controls the gate drive circuit 152 to apply a signal read voltage (control signal) from the gate drive circuit 152 to one gate line 146. As a result, the gates of all TFTs 142 to which the gate electrode G is connected to the gate line 146 are opened, and the charges accumulated in the respective photoelectric conversion elements 140 to which these TFTs 142 are connected (the pin type photoelectric photoelectric conversion in FIG. 10). In the conversion element 140, electrons) are read out to the signal lines 144 as electric signals. Each amplifier 160 amplifies the read electrical signal, and each sample and hold circuit 162 samples the amplified electrical signal and sequentially supplies it to the AD converter 166 via the multiplexer 164. The AD converter 166 performs AD conversion on the sequentially supplied electric signals and converts them into digital signals. The radiation image corresponding to the electrical signal converted into the digital signal is temporarily stored in the image memory 182 of the cassette control unit 174 (step S6).

  In this way, after the readout of the electrical signal (the corresponding radiation image) for each photoelectric conversion element 140 connected to one gate line 146 is completed, the cassette control unit 174 controls the gate drive circuit 152. Then, the gate lines 146 to which a signal reading voltage is applied are sequentially switched, and electrical signals are sequentially read out from the photoelectric conversion elements 140 connected to the switched gate lines 146. Therefore, in the electronic cassette 20A, the processes in steps S5 and S6 are repeated until the reading of the radiation image from each photoelectric conversion element 140 connected to all the gate lines 146 is completed.

  In this manner, the cassette control unit 174 stores the radiographic images from all the photoelectric conversion elements 140 in the image memory 182 in step S7 after the radiographic images of the subject 14 are stored in the image memory 182. The stored radiographic image is displayed on the display 56, and the radiographic image and the cassette ID information stored in the storage unit 186 are both transmitted to the console 22 via the communication unit 176 by wireless communication. The console 22 performs predetermined image processing on the received radiographic image, and transmits the radiographic image after the image processing to the display device 24 by wireless communication. The display device 24 displays the received radiation image. Therefore, the user visually recognizes the radiographic image displayed on the display 56 or the radiographic image displayed on the display device 24 to determine whether the subject 14 has been appropriately imaged according to the imaging order. Can be easily determined.

  In step S8, when imaging of the subject 14 is completed (step S8: YES), the user releases the subject 14 to end imaging (step S9), and then presses the power switch 54 to set the electronic cassette. 20A is shifted to the sleep state. Thereafter, the user carries the electronic cassette 20A to a predetermined storage location (step S10).

  On the other hand, when a plurality of images are captured with respect to the subject 14 and all the imaging is not completed (step S8: NO), the process returns to step S2 or step S3, and the next imaging or Preparation for shooting for the next imaging is performed.

[Effect of the first embodiment]
As described above, according to the electronic cassette 20A according to the first embodiment, when the subject 14 is irradiated with the radiation 16 in a state where the subject 14 is in contact with the top board 35 (radiography is performed on the subject 14). When the load is applied from the subject 14 to the top plate 35, the housing body 30 is deformed so that the hollow portion 41 and the openings 44a and 44b are bent and crushed.

  Therefore, in the first embodiment, the carbon fiber 90 is disposed along the y direction orthogonal to the x direction, which is the axial direction of the housing body 30, at least in the top plate 35 to which a load is applied, thereby bending the housing body 30. The mechanical strength in the z1 direction, which is the direction, can be increased. As a result, compared with the technique of Patent Document 1, the overall mechanical strength of the housing 29 including the housing body 30 is balanced with a smaller amount of carbon fiber 90, and the overall weight of the device is reduced. Can do.

  Further, in a portable electronic cassette (radiation imaging apparatus), if it is accidentally dropped or it is accidentally applied with an impact from the outside, at least a part of the electronic cassette may be damaged. Therefore, it is necessary to consider drop resistance and impact resistance.

  On the other hand, in the first embodiment, as described above, the housing 29 including the housing body 30 is disposed by arranging the carbon fibers 90 along the y direction orthogonal to the x direction in at least the top plate 35. Since the overall mechanical strength is balanced, the drop resistance and impact resistance can be improved when the electronic cassette 20A is configured as a portable device.

  In the technique of Patent Document 1, a casing is configured by uniformly arranging a bundle of carbon fibers in two orthogonal directions, and heat from the subject travels along the two directions through the bundle of carbon fibers. Therefore, it is not easy to secure the location of the connection member, the electronic component, and the circuit board in the casing.

  In contrast, in the first embodiment, the y direction that is the arrangement direction of the carbon fibers 90 and the x direction that is the arrangement direction of the flexible substrates 122 and 126 are different from each other, and the photoelectric conversion of the radiation conversion panel 116 is performed. The flexible substrates 122 and 126 are connected to the side portions of the conversion layer 120 in the x1 direction and the x2 direction, respectively. Thereby, the heat transmitted from the subject 14 to the top plate 35 escapes along the heat transfer directions H1 and H2 (the arrangement direction of the carbon fibers 90), while the control signal is the flexible substrate 122 arranged along the x direction. The electrical signal converted from the radiation 16 by the radiation conversion panel 116 is output to the circuit board 130 via the flexible board 126 arranged along the x1 direction.

  As a result, it is possible to prevent the occurrence of image unevenness in the radiation conversion panel 116 due to the heat. Further, since the flexible boards 122 and 126 are not arranged in the heat transfer directions H1 and H2, the escaped heat is the flexible boards 122 and 126, the driving IC 124, the reading IC 128, the circuit board 130, the electronic component 132, and the power supply unit 94. Can be avoided. Therefore, when an electrical signal is output from the radiation conversion panel 116 to the circuit board 130 via the flexible substrate 126 or when the electrical signal is processed in the electronic component 132, the radiation image is uneven in the radiation image. Can also be prevented.

  As described above, according to the first embodiment, the overall weight of the electronic cassette 20A is reduced by balancing the mechanical strength with less material, and the image unevenness of the radiation image due to the heat transmitted from the outside is achieved. Occurrence can be prevented.

  In the first embodiment, the carbon fiber 90 is arranged in the top plate 35 to obtain the above-described effects. Therefore, the first embodiment is applied to a case made of CFRP that has been generally used conventionally. Can be easily applied.

  Further, at least the top plate 35 of the housing body 30 is configured by stacking a plurality of prepregs 35 a to 35 d including the carbon fibers 90 in the thickness direction (z direction) of the top plate 35, so that the carbon fibers 90 in the y direction. Can be easily arranged. In this case, if the carbon fibers 90 included in at least the outermost prepreg 35a are arranged in the y direction, it is possible to avoid occurrence of the carbon fibers 90 in the vicinity of the openings 44a and 44b.

  In the first embodiment, the following effects can also be obtained.

  By forming the housing 29 by closing the openings 44a and 44b of the housing body 30 with the lid members 32 and 34, only the lid members 32 and 34 can be used even if the electronic cassette 20A is dropped or an external impact is applied. It can be done with damage. As a result, at the time of reworking, only the lid members 32 and 34 need to be replaced, and the repair cost of the electronic cassette 20A can be greatly reduced.

  Thus, since only the lid members 32 and 34 need only be damaged, the radiation conversion panel 116 housed in the hollow portion 41 (chamber 110) of the housing body 30, the power supply unit 94, the flexible substrates 122 and 126, and the driving IC 124 are used. Various electronic components such as the reading IC 128, the circuit board 130, and the electronic component 132 can be appropriately protected.

  In addition, since the housing body 30 has two openings 44a and 44b, the radiation conversion panel 116 and various electronic components in the chamber 110 can be taken in and out from either opening 44a and 44b. It is possible to easily replace these components.

  Furthermore, as described above, since the housing 29 has a monocoque structure, it is possible to reduce the weight of the entire apparatus and to reduce external stress (for example, dropping of the housing 29, load from the subject 14, impact from the outside). ) Can be received as a whole of the casing 29, so that the mechanical strength (drop resistance, load resistance, impact resistance) of the casing 29 can be improved.

  Further, since the housing 29 has a structure in which only the lid members 32 and 34 are damaged due to a drop or an impact from the outside, the irradiation surface 36 and the bottom surface 46 which are the upper surfaces of the housing 29 are not damaged. It can be avoided.

[Second Embodiment]
Next, an electronic cassette 20B according to the second embodiment will be described with reference to FIGS. Note that in the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 12 to 14, the electronic cassette 20 </ b> B according to the second embodiment is different from the first embodiment in that two guide members 188 and 190 are disposed in the hollow portion 41.

  The guide members 188 and 190 are rectangular conductive members made of a material having relatively good thermal conductivity such as aluminum and extending along the x direction. In this case, the guide member 188 is disposed in the hollow portion 41 so as to contact the inner wall of the side plate 49. Further, the guide member 188 is provided with a groove portion 192 into which one side portion of the base 112 is fitted. On the other hand, the guide member 190 is disposed in the hollow portion 41 so as to contact the inner wall of the side plate 51. Further, the guide member 190 is provided with a groove portion 194 into which the other side portion of the base 112 is fitted. In the second embodiment, the base 112 is desirably made of a metal material having a relatively good thermal conductivity such as aluminum, like the guide members 188 and 190.

  Here, the power supply unit 94, the base 112, the radiation conversion panel 116, the flexible boards 122 and 126, the circuit board 130, and the electronic component 132 are integrally configured as an assembly (ASSY), and one of the lid members 32 and 34 is formed. Is separated from the housing body 30 and the opening 44a or the opening 44b communicates with the outside, and the one side of the base 112 constituting the ASSY is formed in the groove 192 through the opening communicating with the outside. When the other side portion of the base 112 is fitted into the groove portion 194 and the base 112 is slid along the groove portions 192 and 194, the ASSY is easily put into the hollow portion 41. be able to.

  Further, when the ASSY is taken out from the electronic cassette 20B, one of the lid members 32 and 34 is separated from the housing body 30, and the opening 44a or the opening 44b is communicated with the outside, and then each groove 192 is removed. , 194 may be slid to the opening communicating with the outside.

  In this way, the ASSY can be taken in and out of the hollow portion 41, and the power supply unit 94, the base 112, the radiation conversion panel 116, the flexible boards 122 and 126, the circuit board 130, and / or Alternatively, the electronic component 132 can be replaced more easily.

  Further, since the guide members 188 and 190 are in contact with the two side plates 49 and 51 of the housing body 30 and extend along the x direction, the casing 29 can be reduced by reducing the thickness of the casing 29. Even when the overall mechanical strength is lowered, the drop resistance and impact resistance can be compensated. In particular, as shown in FIG. 14, in the electronic cassette 20B having a structure in which the thickness of the casing 29 is reduced and the side plates 49 and 51 are rounded, the mechanical strength of the entire casing 29 tends to decrease. By providing the guide members 188 and 190, it is possible to easily compensate for a decrease in mechanical strength.

  In addition, if the base 112 and the guide members 188 and 190 are conductive members having good thermal conductivity, the housing body 30 (the carbon fiber 90 constituting the housing body), the guide members 188 and 190, and the base 112 are included. Since the structure is thermally coupled, the heat generated in the power supply unit 94, the radiation conversion panel 116, the circuit board 130, and the electronic component 132 is released to the housing body 30 via the base 112 and the guide members 188 and 190, It is possible to dissipate heat. As a result, it is possible to further suppress the occurrence of image unevenness in the radiation image. The heat transmitted from the subject 14 to the top plate 35 can also be radiated to the outside from the carbon fibers 90 of the top plate 35 through the guide members 188 and 190 and the side plates 49 and 51.

  In the second embodiment, the guide members 188 and 190 may be configured as follows.

  The impact resistance may be further improved by forming at least a part of each guide member 188, 190 as a shock absorbing member that absorbs the impact. Specifically, in each of the guide members 188 and 190, a part including the groove portions 192 and 194 is made of a heat conductive resin (for example, a resin containing a filler) or a metal, and the other part is the buffer member. As a heat conductive rubber. By doing so, the impact resistance is improved without impairing the sliding performance of the base 112 along the groove portions 192 and 194 and the heat transfer function from the base 112 to the guide members 188 and 190. be able to. In this case, if the portion including the groove portions 192 and 194 is made of a heat conductive resin, each guide member 188 and 190 functions as a buffer member as a whole, while the portion including the groove portions 192 and 194 is a metal. If it comprises, the part of heat conductive rubber will function as a buffer member.

  Note that the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 14 ... Subject 16 ... Radiation 20A, 20B ... Electronic cassette 29 ... Housing 30 ... Housing body 32, 34 ... Cover member 35 ... Top plate 35a-35d ... Pre-preg 36 ... Irradiation surface 41 ... Hollow part 44a, 44b ... Opening 49 51 ... side plate 53 ... bottom plate 90 ... carbon fiber 94 ... power source 110 ... chamber 116 ... radiation conversion panel 120 ... photoelectric conversion layer 122, 126 ... flexible substrate 130 ... circuit board 132 ... electronic component 188, 190 ... guide member 192, 194 ... Groove

Claims (9)

A radiation conversion panel for converting radiation into an electrical signal corresponding to the radiation image;
A circuit board on which electronic components for processing the electrical signals from the radiation conversion panel are mounted;
A connection member for electrically connecting the radiation conversion panel and the circuit board;
A housing that accommodates the radiation conversion panel, the electronic component, the circuit board, and the connection member, and is capable of transmitting the radiation;
With
The casing is a cylindrical casing body formed with a hollow portion that can accommodate the radiation conversion panel, the electronic component, the circuit board, and the connection member, and an opening that communicates with the hollow portion; A lid member that closes the opening,
The housing body is made of fiber reinforced plastic,
Of the casing main body, at least a top plate having an irradiation surface irradiated with the radiation is arranged with fibers constituting the fiber reinforced plastic along a direction intersecting the axial direction of the casing main body. And
The connection member extends along the axial direction when viewed from the incident direction of the radiation, and is connected to a side portion of the radiation conversion panel that intersects the axial direction. apparatus. The apparatus of claim 1.
The fiber reinforced plastic is a carbon fiber reinforced plastic,
A radiation imaging apparatus, wherein carbon fibers are arranged along a direction intersecting the axial direction. The apparatus of claim 2.
At least the top plate of the housing main body is configured by laminating a plurality of prepregs containing the carbon fibers in the thickness direction of the top plate. The apparatus of claim 3.
At least the carbon fibers contained in the prepreg of the outermost layer are arranged in a direction substantially orthogonal to the axial direction. In the apparatus of any one of Claims 1-4,
Guide members that allow at least the radiation conversion panel or the circuit board to be inserted into and removed from the hollow portion through the opening are disposed near the two opposing side plates of the casing main body portion in the hollow portion. A radiation imaging apparatus. The apparatus of claim 5.
Each of the guide members is in contact with two side plates of the casing main body and extends along the axial direction. The apparatus of claim 6.
A base on which the radiation conversion panel is arranged on one surface of the top plate side, and a power supply unit for driving the circuit board and the radiation imaging apparatus is arranged on the other surface on the bottom plate side of the housing main body. Is further housed in the housing,
Each guide member is formed with a groove along the axial direction,
A radiation imaging apparatus characterized in that the base can be slid along the axial direction by inserting both side portions of the base into the grooves. In the apparatus of any one of Claims 5-7,
Each of the guide members is a conductive member. The device according to any one of claims 5 to 8,
Each of the guide members is formed of a buffer member that at least partially absorbs an impact.

Images