JP2012181044A - Radiation imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiation imaging apparatus including a housing which has an electromagnetic shield function in combination with a waterproof function and also considers fall resistance and impact resistance.SOLUTION: A radiation imaging apparatus includes: a housing body part (30) and lid parts (32, 34), which are configured to include conductive portions and waterproof portions; and first conductive members (72, 84) and first waterproof members (400, 402), which are arranged in connection parts between the housing body part (30) and the lid parts (32, 34).

Description

  The present invention relates to a radiation imaging apparatus in which a radiation conversion panel that converts radiation into a radiation image and an electronic component that controls the radiation conversion panel are housed in a housing.

  2. Description of the Related Art Conventionally, in the medical field, a radiation imaging apparatus (hereinafter also referred to as an electronic cassette) that captures a radiation image of a subject by detecting radiation transmitted through the subject has been used. In an electronic cassette, in order to improve portability, a radiation conversion panel that converts radiation into a radiation image and an electronic component that controls the radiation conversion panel are housed in a housing.

  In this case, the electronic component malfunctions due to the influence of an external electromagnetic wave, while an electromagnetic field formed around the electronic component may adversely affect an external electronic device. For such a problem, Patent Document 1 proposes to provide an electromagnetic shield on the casing of the electronic cassette.

JP 2008-304460 A

  By the way, it has the housing | casing comprised from the housing | casing main-body part which has a hollow part which can accommodate a radiation conversion panel and an electronic component, and the cover part which obstruct | occludes the opening part of the said housing | casing main-body part connected to this hollow part. When the electronic cassette is used in an operating room of a medical institution or the like, moisture such as bodily fluid including the blood of a patient as a subject is externally connected to the casing through the connecting portion (gap) between the housing body and the lid. If it enters the body, electronic components may break down. However, Patent Document 1 does not propose any waterproof function of the electronic cassette.

  In the case of a portable electronic cassette, there is a possibility that the casing may be damaged due to dropping or external impact, so it is necessary to consider drop resistance and impact resistance.

  The present invention has been made in order to solve the above-described problems, and provides a radiation imaging apparatus having a housing that combines an electromagnetic shielding function and a waterproof function, and also takes into account drop resistance and impact resistance. With the goal.

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 a radiation image, an electronic component that controls the radiation conversion panel, the radiation conversion panel, and the electronic component. A housing for housing,
The casing includes a casing main body formed with a hollow portion that can accommodate the radiation conversion panel and the electronic component, an opening communicating with the hollow portion, and a lid that closes the opening. And
The housing body and the lid are configured to include a conductive portion and a waterproof portion,
In the connection portion between the housing body and the lid, the first conductive member and the first waterproof member are disposed, the second waterproof member having conductivity is disposed, or the waterproof property is provided. A second conductive member is provided.

  As described above, the casing main body portion and the lid portion include the conductive portion and the waterproof portion, and the connection portion between the casing main body portion and the lid portion includes the first conductive member and the first waterproof member. By arranging the second waterproof member or the second conductive member, the entire housing has both an electromagnetic shield function and a waterproof function. In particular, if the second waterproof member or the second conductive member having both conductivity and waterproofness is disposed in the connection portion, the number of parts and cost of the radiation imaging apparatus can be reduced.

  In addition, by forming the casing by closing the opening of the casing main body with the lid, it is possible to eliminate only the lid even if there is a drop or an external impact. . As a result, when the casing is repaired, only the lid portion needs to be replaced, and the repair cost of the radiation imaging apparatus can be greatly reduced. In this way, since only the lid portion needs to be damaged, it is possible to protect the radiation conversion panel and the electronic component housed in the housing main body portion.

  Therefore, according to the present invention, it is possible to realize a radiation imaging apparatus having the casing that has both an electromagnetic shielding function and a waterproof function, and also takes drop resistance and impact resistance into consideration.

  Here, if the conductive portion of the housing body and the conductive portion of the lid are electrically connected via the first conductive member, the second waterproof member, or the second conductive member, the housing The electromagnetic shield can be integrally formed on the whole, and as a result, the electromagnetic shield function can be further improved.

  Further, if the first conductive member and / or the first waterproof member, the second waterproof member, or the second conductive member functions as a shock absorbing material that absorbs an external impact, the casing is Even when the lid portion is damaged by dropping or external impact on the housing, the radiation conversion panel and the electronic component housed in the housing body portion can be appropriately protected. it can. Furthermore, even when the housing body is damaged, the radiation conversion panel and the electronic component can be appropriately protected by the shock absorbing function of the cushioning material.

  Here, it is preferable that the housing is a hexahedron having a monocoque structure, and at least one of the plurality of surfaces constituting the housing is formed on the lid. By using a monocoque housing, the overall weight of the device can be reduced, and external stress (dropping of the housing, load from the subject, impact from the outside) can be received as a whole housing. The mechanical strength of the housing can be improved.

  Next, specific configurations (1) to (6) of the monocoque housing will be described.

  (1) The casing main body is a hexahedron, and two opposing side surfaces of the casing main body are each formed with an opening communicating with the hollow portion, and the two lids are each of the openings. Each part may be closed. Thereby, the radiation conversion panel and the electronic component can be taken in and out from either opening, and the replacement operation of the radiation conversion panel and the electronic component can be easily performed.

  (2) The two side surfaces of the casing formed between the two lid portions may be formed in an arc shape or a taper shape outward. If the two side surfaces are arcuate, the casing has a rounded shape. Therefore, the first waterproof member and the second waterproof member are connected to a connection portion between the lid and the casing body. Or it becomes easy to arrange | position the said 2nd electrically-conductive member. Further, by forming the two side surfaces in a circular or tapered shape, the housing can be easily manufactured and the mechanical strength is increased.

  (3) The opening portion formed on one side surface of the housing main body portion and communicating with the hollow portion may be closed with the lid portion, and a handle may be provided on the side surface of the housing facing the lid portion. Good. As a result, the radiation imaging apparatus can be easily transported by gripping a handle with the lid portion down, and even if the housing is dropped during transportation, only the lid portion is damaged. You can do it.

  (4) The opening formed on one side surface of the housing main body and communicating with the hollow portion may be closed with the lid, and a handle may be provided on the lid. In this case, the handle provided on the lid is gripped with the lid side facing up, but the radiation imaging apparatus can be easily transported.

  (5) Of the plurality of surfaces, an irradiation surface to which the radiation is irradiated and a bottom surface facing the upper surface, which is the irradiation surface, may be formed on the housing body. As described above, the casing has a structure in which only the lid portion can be damaged against a drop or an impact from the outside. Therefore, the irradiation surface and the bottom surface are formed on the casing main body portion. Thus, damage to the irradiation surface and the bottom surface can be avoided.

  (6) Of the plurality of surfaces, an irradiation surface to which the radiation is irradiated or a bottom surface facing the upper surface which is the irradiation surface may be formed on the lid portion. When the subject comes into contact with the irradiation surface, the irradiation surface may be soiled or scratched. In addition, the bottom surface may be soiled or scratched by sliding the housing on the photographing stand. Therefore, if the irradiation surface or the bottom surface is soiled or scratched, only the lid portion needs to be replaced. Therefore, the subject is imaged with the housing clean while suppressing the repair cost. be able to.

  In each of the above-described inventions, the casing main body and the lid are made of a conductive member, or a conductive member is included inside the casing main body and the lid, or the casing The conductive portion may be configured by forming a conductive member on the surface of the body main body portion and the lid portion. In either case, the electromagnetic shielding function of the casing can be easily realized.

  Further, if a cushioning member that absorbs external impact is further provided on the side surface or corner of the lid portion, the radiation conversion panel and the electronic component can be appropriately protected against dropping or external impact. Can do.

  ADVANTAGE OF THE INVENTION According to this invention, the radiographic imaging apparatus which has a housing | casing which considered both the electromagnetic shielding function and the waterproof function, and also considered impact resistance is realizable.

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. It is sectional drawing which shows the other structure of a housing | casing. It is sectional drawing which shows the other structure of a housing | casing. 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 which shows the other structure of a housing | casing. It is sectional drawing which shows the other structure of a housing | casing. It is sectional drawing which shows the other structure of a housing | casing. It is sectional drawing which shows the other structure of a housing | casing. It is sectional drawing which shows the other structure of a housing | casing. It is sectional drawing which shows the other structure of a housing | casing. It is sectional drawing which shows the other structure of a housing | casing. It is a disassembled perspective view which shows the other structure of a housing | casing. 19A and 19B are cross-sectional views of the main part showing another configuration of the housing. 20A and 20B are main part cross-sectional views showing other configurations of the housing. It is principal part sectional drawing which shows the other structure of a housing | casing. It is a perspective view of the electronic cassette concerning a 2nd embodiment. It is a perspective view of the electronic cassette of FIG. It is a perspective view of the electronic cassette concerning a 3rd embodiment. It is a disassembled perspective view of the housing | casing 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.

[Description of Configuration of Radiation Imaging Apparatus According to 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 includes a substantially rectangular casing 29 that is disposed between the imaging table 12 and the subject 14.

  The housing 29 is a monocoque housing having a hollow rectangular tube-shaped housing body 30 and two lid members 32 and 34 for closing the opening of the housing body 30 from both sides. For example, the entire housing 29 is subjected to the housing 29 falling, the load from the subject 14, and the impact from the outside. Moreover, the housing | casing 29 (the housing main body 30 and the cover members 32 and 34) consists of metals (conductive part), such as magnesium and aluminum which can permeate | transmit the radiation | emission 16, and are provided with electroconductivity and waterproofness.

  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 main body 30, a hollow portion 41 is formed between the side surface 42 a and the side surface 42 b along the x direction. The housing 29 is configured by closing the opening 44 a on the side surface 42 a communicating with the lid member 32 and closing the opening 44 b on the side surface 42 b communicating with the hollow portion 41 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 formed insertion portion 70 that can be fitted into the opening 44 a, a waterproof seal member (first waterproof member) 400 made of rubber, resin, or the like disposed on the side surface of the insertion portion 70, and the insertion portion 70. It is comprised from the engagement piece (1st electroconductive member) 72 which protrudes toward the opening part 44a from the both ends along y direction of this, and has electroconductivity. 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 side of the inner wall of the housing main body 30 and the insertion portion 70 are fitted, and the two engaging pieces 72 that have entered the hollow portion 41 of the housing main body 30 are fitted. When the engaging convex portion 74 and the engaging concave portion 76 are engaged with each other, the opening 44 a is closed by the lid member 32, and the lid member 32 and the housing body 30 can be integrated.

  Further, since the housing body 30, the lid member 32, and the two engaging pieces 72 are conductive members, the engaging convex portions 74 and the engaging concave portions 76 of the two engaging pieces 72 are engaged with each other. The housing body 30 and the lid member 32 are electrically connected via the two engagement pieces 72. Furthermore, since the sealing member 400 is a waterproof member, the opening 44a side of the inner wall of the housing body 30 and the insertion portion 70 are fitted, and the sealing member 400 is fitted into the recess provided in the inner wall. The fitting portion (connecting portion) between the inner wall and the insertion portion 70 is sealed, and moisture (for example, body fluid containing the blood of the patient who is the subject 14) from the outside to the hollow portion 41 through the gap between the fitting portions. ) Can be prevented.

  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 that can be fitted, a waterproof seal member (first waterproof member) 402 that is disposed on the side surface of the insertion portion 82 and is made of the same material as the seal member 400, and along the y direction of the insertion portion 82 The engaging piece (first conductive member) 84 protrudes from both ends toward the opening 44b and has conductivity. 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 side of the inner wall of the housing body 30 and the insertion portion 82 are fitted, and the hollow portion of the housing body 30 is fitted. When the engaging projections 86 and the engaging recesses 88 of the two engaging pieces 84 that have entered 41 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 are integrated. It can be made.

  Further, since the lid member 34 and the two engaging pieces 84 are also conductive members, the housing main body 30 is obtained by engaging the engaging convex portions 86 and the engaging concave portions 88 of the two engaging pieces 84 respectively. And the lid member 34 are electrically connected through two engaging pieces 84. Furthermore, since the sealing member 402 is also a waterproof member, the opening 44b side of the inner wall of the housing body 30 and the insertion portion 82 are fitted, and the sealing member 402 is fitted into the recess provided in the inner wall. The fitting portion (connection portion) between the inner wall and the insertion portion 82 is sealed, and entry of moisture from the outside into the hollow portion 41 through the gap between the fitting portions can be prevented.

  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 in the center of the chamber 110, and radiation incident on the chamber 110 through the irradiation surface 36 side of the housing body 30 on the surface 114 (surface on the irradiation surface 36 side) of the base 112. A radiation conversion panel 116 for converting 16 into a radiation image is disposed.

  The radiation conversion panel 116 preferably has a plane area slightly smaller than the base 112 in a plan view of FIG. 4 and has a size corresponding to the imageable region 40. The base 112 is supported at the center of the chamber 110 by a support member (not shown). Further, the radiation conversion panel 116 may be fixed to the base 112 by fixing means (not shown), or may be bonded to the inner wall of the housing body 30 on the irradiation surface 36 side.

  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.

  In addition, the scintillator 118 and the photoelectric conversion layer 120 may be stacked in a separable state in consideration of generation of warpage due to heat. Alternatively, the photoelectric conversion layer 120 may be directly formed on the scintillator 118, or the scintillator 118 may be directly formed on the photoelectric conversion layer 120.

  5 and 6 illustrate an ISS (Irradiation Side Sampling) type radiation detector as a surface reading method in which the photoelectric conversion layer 120 and the scintillator 118 are arranged in this order along the irradiation direction of the radiation 16. However, it may be a PSS (Penetration Side Sampling) type radiation detector, which is a back side reading type, arranged in the order of the scintillator 118 and the photoelectric conversion layer 120 along the irradiation direction of the radiation 16. As the scintillator 118, for example, a scintillator made of cesium iodide (CsI) or gadolinium oxide sulfa (GOS) may be used. Furthermore, in the first embodiment, instead of the indirect conversion type radiation detector described above, a so-called direct conversion type radiation detector that directly converts the radiation 16 into an electric signal without using the scintillator 118 may be used. Is possible. In the following description, a case where the ISS type radiation conversion panel 116 is used will be described.

  A plurality of flexible substrates 122 for supplying a control signal for driving the photoelectric conversion layer 120 to the photoelectric conversion layer 120 are provided at predetermined intervals on the side surface in the y1 direction of the radiation conversion panel 116 (photoelectric conversion layer 120). Each of the flexible boards 122 is provided with a driving IC 124 that generates the control signal. 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 126 for reading out electrical signals corresponding to the radiation image from the photoelectric conversion layer 120 driven by the supply of the control signal. 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 is disposed on the back surface 129 of the base 112 (the surface on the bottom surface 46 side of the housing 29). In this case, the power supply unit 94 may be disposed so as to come into contact with the base 112, or may be connected to a connecting member (not shown) provided on the back surface 129 side of the base 112. A plurality of circuit boards 130 are attached around the power supply section 94 on the back surface 129 of the base 112 so as to surround (avoid) the power supply section 94, and the electronic component 132 is mounted on the circuit board 130. It is arranged. As shown in FIG. 5, a flexible substrate 126 is connected to some circuit boards 130, while a flexible substrate 122 is connected to other circuit boards 130 as shown in FIG. 6.

  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 made of a lead plate capable of shielding the radiation 16, or It may be configured to include lead.

  In the above description, the case where the housing main body 30 and the two lid members 32 and 34 of the housing 29 are made of metal (conductive member) has been described. However, in the first embodiment, as shown in FIGS. The housing 29 may be configured.

  7 shows that the housing body 30 and the two lid members 32 and 34 are made of a resin that can transmit the radiation 16 and have a waterproof property, and are made of a metal plate or a conductive filler such as carbon or metal powder. The case where the members (conductive portions) 404, 406, and 408 are contained in the resin is illustrated.

  Since the resin is an electrically insulating material, for the purpose of electrically connecting each conductive member 404 and each conductive member 406 via the two engagement pieces 72, the engagement piece 72 side of the housing body 30 is provided. The conductive member 404 is exposed and brought into contact with the engagement piece 72, and the conductive member 406 on the engagement piece 72 side of the lid member 32 is exposed and brought into contact with the engagement piece 72. On the other hand, also when each conductive member 404 and each conductive member 408 are electrically connected via the two engagement pieces 84, the conductive member 404 on the engagement piece 84 side of the housing body 30 is exposed. The conductive member 408 on the engaging piece 84 side of the lid member 34 may be exposed and brought into contact with the engaging piece 84.

  As a method for exposing the conductive members 404, 406, and 408, for example, the inner wall (resin) on the side of the engaging pieces 72 and 84 of the housing body 30 is scraped to expose the conductive member 404 and to cover the member. The conductive members 406 and 408 may be exposed by scraping the surfaces (resins) on the engagement pieces 72 and 84 side of the 32 and 34, respectively. Alternatively, the housing body 30 is molded so that the conductive member 404 is exposed on the inner wall of the housing body 30 on the engagement pieces 72 and 84 side, and the surface of the lid members 32 and 34 on the engagement pieces 72 and 84 side is formed. The lid members 32 and 34 may be formed so that the conductive members 406 and 408 are exposed.

  In FIG. 8, the housing main body 30 and the two lid members 32 and 34 are made of the resin, and the outer surface of the housing main body 30 and the two lid members 32 and 34 can transmit the radiation 16 and has a waterproof property. The case where it coat | covers with the member (electroconductive part) 410, 412, 414, respectively is illustrated.

  In this case, the conductive member 410 is extended to the seal member 400 side of the housing body 30 so as to be in contact with the engagement piece 72 and the seal member 400, and the conductive member 410 is extended to the engagement piece 72. By electrically connecting the engaging piece 72 and the conductive member 410 to each other, the conductive member 410 and the conductive member 412 can be electrically connected via the two engaging pieces 72. . Further, the conductive member 410 is extended to the seal member 402 side of the housing body 30 so as to be in contact with the engagement piece 84 and the seal member 402, and the conductive member 414 is extended to the engagement piece 84. Thus, by electrically connecting the engaging piece 84 and the conductive member 414, the conductive member 410 and the conductive member 414 can be electrically connected via the two engaging pieces 84.

  The thin portions of the outer surfaces of the housing main body 30 and the lid members 32 and 34 in the conductive members 410, 412, and 414 are preferably made of a conductive coating film formed by, for example, conductive coating.

  FIG. 9 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. 9 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. 9, 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. 9 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 Radiation Imaging Device According to 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 9) 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 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. 9). 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.

[Effects of the radiation imaging apparatus according to the first embodiment]
As described above, according to the electronic cassette 20A according to the first embodiment, the housing body 30 and the lid members 32 and 34 are made of metal having conductivity and waterproofness (see FIGS. 4 to 6). The housing body 30 and the lid members 32 and 34 are configured by containing conductive members 404, 406, and 408 in a waterproof resin (see FIG. 7), or the resin outside the waterproof resin. The housing body 30 and the lid members 32 and 34 are configured by covering the surfaces with waterproof conductive members 410, 412, and 414 (see FIG. 8).

  Further, in the connection portion between the housing main body 30 and the lid members 32 and 34 (the fitting portion between the inner wall of the housing main body 30 on the side of the openings 44a and 44b and the insertion portions 70 and 82 of the lid members 32 and 34), it is conductive. The housing body 30 (the conductive portion thereof) and the lid members 32 and 34 (the conductive portion thereof) are electrically connected via the engaging pieces 72 and 84 having the sealing members 400 and 402 as waterproofing members. It is sealed by.

  Therefore, in the electronic cassette 20A, the entire housing 29 has both an electromagnetic shield function and a waterproof function.

  Further, by forming the housing 29 by closing the openings 44a and 44b of the housing main body 30 with the lid members 32 and 34, the lid members 32 and 34 even if the electronic cassette 20A is dropped or an external impact is applied. It can be done with only damage. As a result, when the housing 29 is repaired, 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.

  Therefore, according to the first embodiment, it is possible to realize the electronic cassette 20A having the casing 29 that has both the electromagnetic shielding function and the waterproof function, and also takes into consideration the drop resistance and the impact resistance.

  Further, as described above, the housing body 30 (conductive portion thereof) and the lid members 32 and 34 (conductive portions thereof) are electrically connected via the engaging pieces 72 and 84 having conductivity. An electromagnetic shield can be integrally applied to the entire housing 29, and as a result, the electromagnetic shielding function of the electronic cassette 20A can be further improved.

  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.

  Furthermore, since two openings 44a and 44b are formed in the housing body 30, the radiation conversion panel 116 and various electronic components in the chamber 110 can be taken in and out from either of the openings 44a and 44b. These components can be easily replaced.

  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.

[Description of Modification of Radiation Imaging Device According to First Embodiment]
Next, a modified example of the electronic cassette 20A according to the first embodiment will be described with reference to FIGS.

  FIG. 11 is a cross-sectional view showing a case where the PSS radiation conversion panel 116 is housed. Even in this case, the same effects as those of the ISS radiation conversion panel 116 described above can be obtained. .

  FIG. 12 shows an upper case 30a having an inverted U-shaped cross section, a lower case 30b having a U-shaped cross section that supports the upper case 30a, and an upper plate 30c attached to a recess formed on the upper surface of the upper case 30a. The housing main body 30 is comprised from these. The upper case 30a and the lower case 30b are made of a metal that can transmit the radiation 16 and have conductivity and waterproofness, and the upper plate 30c is made of a resin that can transmit the radiation 16 and has waterproofness.

  A seal member 420 made of the same material as the seal members 400 and 402 described above is disposed at a contact portion (connection portion) between the upper case 30a and the lower case 30b. Furthermore, two engagement pieces (first conductive members) 422 made of the same material as the engagement pieces 72 and 84 are disposed on the inner wall of the side portion of the upper case 30a so as to face downward. An engaging convex portion 424 is formed on the outer surface of 72. Furthermore, an engagement recess 426 that can be engaged with the engagement projection 424 is formed on the inner wall of the side portion of the lower case 30b. In the case of FIG. 12, the housing main body 30 (including the housing 29) is formed by connecting the upper case 30a and the upper plate 30c as lid portions to the lower case 30b as the housing main body portion. Is configured.

  That is, when the upper case 30a to which the upper plate 30c is attached is advanced in the z1 direction so that the engaging convex portions 424 and the engaging concave portions 426 of the two engaging pieces 422 are engaged, respectively, The side case 30 b is integrated, and the hollow portion 41 (the chamber 110) can be formed in the housing main body 30. Further, the engagement convex portion 424 and the engagement concave portion 426 of the two engagement pieces 422 are engaged with each other, so that the upper case 30a and the lower case 30b are electrically connected via the two engagement pieces 422. Connected. Furthermore, the connection portion between the upper case 30a and the lower case 30b is sealed by the sealing member 420 as a waterproof member, and it is possible to prevent moisture and the like from entering the hollow portion 41 from the outside through the gap between the connection portions. it can.

  Furthermore, since the upper plate 30c forms the irradiation surface 36, if the irradiation surface 36 that the subject 14 may come into contact with becomes dirty or scratched, only the upper plate 30c needs to be replaced. Imaging of the subject 14 can be performed in a state where the housing 29 is clean while suppressing cost. Of course, when the upper case 30a to which the upper plate 30c is attached becomes dirty or scratched, only the upper case 30a is replaced, and the upper plate 30c and the lower case 30b can be used as they are.

  FIG. 13 illustrates a case where the upper plate 30c does not exist and the upper surface of the upper case 30a is substantially flush. Therefore, in the case of FIG. 13, only the upper case 30a functions as a lid. Also in FIG. 13, when the irradiation surface 36 is soiled or scratched, only the upper case 30 a needs to be replaced. Therefore, even in this case, the repair cost can be suppressed and the subject 14 can be kept clean while the casing 29 is clean. Can be imaged.

  FIG. 14 illustrates the case where the upper case 30a is supported by the bottom plate 30d made of the same material as the upper case 30a while the side portion of the upper case 30a extends to the vicinity of the bottom surface 46. Therefore, the seal member 420 is disposed at a contact portion between the upper case 30a and the bottom plate 30d. Further, two engaging pieces (first conductive members) 430 made of the same material as the engaging pieces 72, 84, and 422 are disposed on the bottom plate 30 d so as to face upward, and the outer surfaces of the two engaging pieces 430 are arranged. An engaging projection 432 is formed on the. Further, an engagement recess 434 that can be engaged with the engagement protrusion 432 is formed on the inner wall of the side portion of the upper case 30a.

  Therefore, even in this case, when the upper case 30a is advanced in the z1 direction and the engagement convex portions 432 and the engagement concave portions 434 of the two engagement pieces 430 are respectively engaged, the upper case 30a and the bottom plate 30d are It is integrated and the hollow part 41 (chamber 110) can be formed in the housing main body 30. FIG. Further, the engagement convex portion 432 and the engagement concave portion 434 of the two engagement pieces 430 are engaged with each other, so that the upper case 30a and the bottom plate 30d are electrically connected via the two engagement pieces 430. The Furthermore, the sealing member 420 seals the connection portion between the upper case 30a and the bottom plate 30d, thereby preventing moisture and the like from entering the hollow portion 41 from the outside through the gap between the connection portions.

  In FIG. 14, by sliding the bottom surface 46 of the housing 29 on the photographing table 12, when the bottom surface 46 becomes dirty or scratched, only the bottom plate 30d has to be replaced. The cost can be suppressed, and the subject 14 can be imaged with the housing 29 clean.

  FIG. 15 shows a case where the side portion of the lower case 30b extends to the vicinity of the irradiation surface 36 and an upper plate (top plate) 30e made of the same material as the lower case 30b is supported by the lower case 30b. It is illustrated. Therefore, the seal member 420 is disposed at a contact portion between the upper plate 30e and the lower case 30b. In addition, the upper plate 30e is provided with an engagement piece 422 facing downward, and an engagement recess 426 that can engage with the engagement projection 424 is formed on the inner wall of the side of the lower case 30b. Has been.

  Accordingly, even in this case, when the upper plate 30e is advanced in the z1 direction and the engagement convex portions 424 and the engagement concave portions 426 of the two engagement pieces 422 are engaged with each other, the upper plate 30e and the lower case 30b are engaged. And the hollow portion 41 (chamber 110) can be formed in the housing body 30. Further, the engagement convex portion 424 and the engagement concave portion 426 of the two engagement pieces 422 are engaged with each other, so that the upper plate 30e and the lower case 30b are electrically connected via the two engagement pieces 422. Connected. Further, the sealing member 420 seals the connecting portion between the upper plate 30e and the lower case 30b, thereby preventing moisture and the like from entering the hollow portion 41 (chamber 110) from the outside through the gap between the connecting portions. can do.

  In the configuration of FIG. 15, when the upper plate 30 e forming the irradiation surface 36 is soiled or scratched, only the upper plate 30 e needs to be replaced. Therefore, the same effect as the configuration of FIGS. 12 and 13 can be obtained. .

  FIG. 16 illustrates a case where the housing body 30 is configured by covering the lower case 30b with the upper case 30a. Therefore, the side part of the lower case 30b is arranged inside the side part of the upper case 30a. In this case, a seal member 440 made of the same material as the seal members 400, 402, and 420 is inserted in the gap between the side portion of the upper case 30 a and the side portion of the lower case 30 b. Further, an engagement piece 422 is disposed on the top plate portion of the upper case 30a (the upper plate portion constituting the irradiation surface 36) so as to face downward, and the inner wall of the side portion of the lower case 30b is engaged with the engagement plate 422. A concavity 426 is formed.

  In the case of FIG. 16, when the upper case 30a is advanced in the z1 direction so that the upper case 30a covers the lower case 30b, the engagement convex portions 424 and the engagement concave portions 426 of the two engagement pieces 422 are formed. By being engaged with each other, the upper case 30 a and the lower case 30 b are integrated, and the hollow portion 41 (the chamber 110) can be formed in the housing body 30. Further, the engagement convex portion 424 and the engagement concave portion 426 of the two engagement pieces 422 are engaged with each other, so that the upper case 30a and the lower case 30b are electrically connected via the two engagement pieces 422. Connected. Further, since the seal member 440 seals the gap between the side of the upper case 30a and the side of the lower case 30b and the connection between the upper case 30a and the lower case 30b, these portions are externally provided. It is possible to prevent moisture or the like from entering the hollow portion 41 (chamber 110) via the. Furthermore, in the configuration of FIG. 16, when the upper case 30a forming the irradiation surface 36 is soiled or scratched, it is needless to say that only the upper case 30a needs to be replaced.

  FIG. 17 shows that when the housing body 30 is configured by covering the lower case 30b with the upper case 30a, the top plate portion and side portions of the upper case 30a, the side portions of the lower case 30b, and the engagement pieces This is different from the case of FIG. 16 in that a seal member 420 is inserted in a space formed between the space 422 and the space 422. Even in this case, since the space is sealed, it is possible to prevent moisture and the like from entering the hollow portion 41 (chamber 110) from the outside through the space. can get.

  18 is different from the case of FIGS. 1 to 17 in that the side surface 43 of the housing 29 bulges in an arc shape in the y1 direction and the side surface 45 bulges in an arc shape in the y2 direction. Is different. In this case, the opening portions 44a and 44b and the hollow portion 41 (chamber 110) have an oval shape along the y direction.

  By making the side surfaces 43 and 45 of the housing 29 bulge in an arc shape, the housing 29 has a rounded shape. Therefore, a seal is provided at a connection portion between each lid member 32 and 34 and the housing body 30. It becomes easy to arrange the members 400 and 402. In addition, by making the two side surfaces 43 and 45 circular, the housing 29 can be easily manufactured and the mechanical strength is increased. Moreover, it is good also as a shape which the shape of the side surfaces 43 and 45 swells in a taper shape in ay direction. Even in this case, the manufacture of the housing 29 is facilitated and the mechanical strength is increased.

  19A to 20B exemplarily show the case where buffer members 442, 444, and 446 that absorb an external impact are provided on the lid member 34, the lid member 32 may be provided similarly. Of course, it is possible.

  FIG. 19A illustrates a case where the entire side surface of the lid member 34 is covered with a buffer member 442 such as rubber, gel, or sponge, and FIG. 19B illustrates that the corner member of the lid member 34 is made of the same material as the buffer member 442. The case where the buffer member 444 is provided is illustrated. FIG. 20A illustrates a case in which a shock-absorbing member 446 such as rubber or gel having waterproof properties is provided on the side surface of the insertion portion 82. The shock-absorbing member 446 includes the above-described seal member 402. ing. Furthermore, FIG. 20B illustrates the case where the buffer member 444 and the buffer member 446 are provided on the lid member 34.

  In any case, the radiation conversion panel 116 and various electronic components housed in the housing body 30 can be appropriately protected against the electronic cassette 20A falling or external impacts.

  In the case of FIGS. 20A and 20B, since the buffer member 446 having the function of the seal member 402 is used, the electronic cassette 20A is dropped or the lid is applied by applying an impact to the housing 29 from the outside. Even when the member 34 is damaged, the radiation conversion panel 116 and various electronic components accommodated in the housing body 30 can be appropriately protected. Even when the housing body 30 itself is damaged, the radiation conversion panel 116 and various electronic components can be appropriately protected by the shock absorbing function of the buffer member 446.

  1 to 20B, the electrical connection between the housing main body 30 and the lid members 32 and 34 is performed by engaging pieces 72, 84, 422, and 430 which are conductive plate-like members (plate springs). However, the first embodiment is not limited to these descriptions, and any configuration may be used as long as the housing body 30 and the lid members 32 and 34 can be electrically connected. . For example, a metal net or metal foil may be inserted in the connection portion between the housing body 30 and the lid members 32 and 34.

  In addition, as shown in FIG. 21, instead of the seal members 400 and 402 made of rubber or resin, a seal member (second waterproof member, second seal member) such as conductive rubber or metal seal having both conductivity and waterproofness. Conductive members) 450 and 452 may be provided. Accordingly, when the insertion portions 70 and 82 of the lid members 32 and 34 are fitted to the openings 44a and 44b side of the inner wall of the housing body 30, the connecting portion between the inner wall and the insertion portions 70 and 82 is sealed. Intrusion of moisture into the hollow portion 41 from the outside is prevented, and the housing body 30 and the lid members 32 and 34 are electrically connected via the seal members 450 and 452. In the case of FIG. 21, the engagement pieces 72 and 84 may be plate members made of resin. However, if the lid members 32 and 34 and the housing body 30 are firmly fitted, the engagement pieces 72 and 84 are not necessary.

  As described above, in the case of FIG. 21, the number of parts and cost of the electronic cassette 20A can be reduced by using the seal members 450 and 452 having both conductivity and waterproofness.

  Moreover, although the sealing members 400, 402, 420, 440, 450, and 452 described above have a waterproof function, it is needless to say that they may function as cushioning materials. Furthermore, although the engagement pieces 72, 84, 422, and 430 described above are conductive leaf springs, they may function as cushioning materials. Even in this case, even if the housing 29 is dropped or an impact is applied to the housing 29 from the outside, the radiation conversion panel 116 and various electronic components housed in the housing body 30 can be appropriately protected. . Even when the housing body 30 is damaged, the radiation conversion panel 116 and various electronic components can be appropriately protected by the shock absorbing function of the buffer material.

[Description of Radiation Imaging Device According to 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, detailed description thereof is omitted, and so forth.

  In the electronic cassette 20B according to the second embodiment, the x2 direction side of the housing 29 is a thin plate-like lid member 32, and the x1 direction side is a grip portion 206 that can be gripped by the user. Therefore, the user can carry the electronic cassette 20 </ b> B while holding the handle 208 of the holding unit 206.

  23, the lid member 32 is provided with two engagement pieces 462 made of the same material as the engagement pieces 72, 84, 422, and 430 of FIGS. The inner wall on the side of the opening 44a has two engagements that can engage with the engagement convex portion 464 of the engagement piece 462 when the lid member 32 is rotated toward the opening 44a around a hinge member (not shown). A concavity 466 is formed. Further, a seal member 460 made of the same material as the seal members 400, 402, 420, and 440 of FIGS. 1 to 20B is disposed on the side surface 42a so as to surround the opening 44a.

  Therefore, when the lid member 32 is rotated to the opening 44a side with the hinge member as the center, the engagement convex portion 464 and the engagement concave portion 466 engage with each other, and the opening portion 44a is closed by the lid member 32. A body 29 is constructed.

  Even in this case, the housing body 30 and the lid member 32 are electrically connected via the two engagement pieces 462. Further, the gap between the side surface 42a and the lid member 32 is sealed by the seal member 460, and moisture can be prevented from entering the hollow portion 41 from the outside through the gap. Therefore, also in 2nd Embodiment, the effect similar to 1st Embodiment is acquired.

  In the second embodiment, since the electronic cassette 20B is transported by gripping the handle 208 with the lid member 32 down, even if the housing 29 is dropped during transportation, only the lid member 32 is damaged. I can finish it.

  In the second embodiment, the same effect as in FIG. 21 can be obtained by replacing the seal member 460 with the seal member 450 in FIG. Further, the seal member 460 and / or the engagement piece 462 may function as a cushioning material.

[Description of Radiation Imaging Device According to Third Embodiment]
Next, an electronic cassette 20C according to the third embodiment will be described with reference to FIGS.

  In the electronic cassette 20C according to the third embodiment, the thickness of the housing 29 is entirely thin, the side surface 42a of the housing body 30 is a curved surface, and the lid member 32 is also curved in accordance with the curved surface. It has become. In this case, the central portion of the side surface 42a is recessed toward the x1 direction, and the central portion of the lid member 32 is a convex portion that bulges in the x1 direction corresponding to the concave portion of the side surface 42a. A handle 220 is provided on the convex portion.

  On the other hand, two corner portions 226 (two corner portions connecting the side surface 42b and the side surfaces 42c and 42d) in the x1 direction of the housing body 30 are recessed toward the center of the housing body 30, and L A character-shaped buffer member 222 is fitted.

  In addition, since the housing 29 of the electronic cassette 20C is thin, the display 56 is disposed outside the imageable area 40 on the irradiation surface 36, and the power switch 54, the input terminal 58, the USB terminal 60, and the card slot 64 are It is arranged on the side surface 42d.

  In the third embodiment, the sealing member 470 is disposed on the lid member 32 so as to fill the curved and thin opening 44a. The lid member 32 is provided with two engagement pieces 472 made of the same material as the engagement pieces 72, 84, 422, 430 of FIGS. 1 to 20B and the engagement piece 462 of FIG. Two engagement recesses 476 that can engage with the engagement projections 474 of the engagement pieces 472 are formed on the inner wall of the 30 opening 44a side.

  Therefore, when the lid member 32 and the opening 44 a are fitted, the engagement convex portion 474 and the engagement concave portion 476 are engaged, and the opening 44 a is closed by the lid member 32, thereby forming the housing 29. . Therefore, even in this case, the housing body 30 and the lid member 32 are electrically connected via the two engagement pieces 472. Further, since the gap between the side surface 42a and the lid member 32 is sealed by the sealing member 470, it is possible to prevent moisture from entering the hollow portion 41 through the gap. Therefore, also in 3rd Embodiment, the effect similar to 1st and 2nd embodiment is acquired.

  In the third embodiment, since the handle 220 is provided on the lid member 32, the electronic cassette 20C is transported by holding the handle 220 with the lid member 32 facing upward. The electronic cassette 20C can be easily transported.

  In the third embodiment, the same effect as in FIG. 21 can be obtained by replacing the seal member 470 with the seal member 450 in FIG. Further, the seal member 470 and / or the engagement piece 472 may function as a cushioning material.

  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.

16 ... Radiation 20A-20C ... Electronic cassette 29 ... Housing 30 ... Housing body 30a ... Upper case 30b ... Lower case 30c, 30e ... Upper plate 30d ... Bottom plate 32, 34 ... Cover member 36 ... Irradiation surface 41 ... Hollow portion 42a ... 42d, 43, 45, 52, 81 ... side surfaces 44a, 44b ... opening 46, 47 ... bottom surface 72, 84, 422, 430, 462, 472 ... engagement piece 94 ... power source 110 ... chamber 116 ... radiation conversion panel 122, 126 ... flexible substrate 124 ... driving IC
128 ... IC for reading
DESCRIPTION OF SYMBOLS 130 ... Circuit board 132 ... Electronic component 208, 220 ... Handle 222, 442-446 ... Buffer member 400, 402, 420, 440, 450, 452, 460, 470 ... Seal member 404-414 ... Conductive member

Claims (12)

A radiation conversion panel for converting radiation into a radiation image;
An electronic component for controlling the radiation conversion panel;
A housing for housing the radiation conversion panel and the electronic component;
With
The casing includes a casing main body formed with a hollow portion that can accommodate the radiation conversion panel and the electronic component, an opening communicating with the hollow portion, and a lid that closes the opening. And
The housing body and the lid are configured to include a conductive portion and a waterproof portion,
In the connection portion between the housing body and the lid, the first conductive member and the first waterproof member are disposed, the second waterproof member having conductivity is disposed, or the waterproof property is provided. A radiation imaging apparatus, characterized in that a second conductive member is disposed. The apparatus of claim 1.
The conductive portion of the housing body and the conductive portion of the lid are electrically connected via the first conductive member, the second waterproof member, or the second conductive member. Radiation imaging device. The apparatus according to claim 1 or 2,
The radiation imaging apparatus, wherein the first conductive member and / or the first waterproof member, the second waterproof member, or the second conductive member functions as a buffer material that absorbs an external impact. The device according to any one of claims 1 to 3,
The housing is a monocoque hexahedron,
A radiation imaging apparatus, wherein at least one of the plurality of surfaces constituting the housing is formed on the lid. The apparatus of claim 4.
The housing body is a hexahedron,
Openings communicating with the hollow portion are respectively formed on two opposing side surfaces of the housing main body,
2. The radiation imaging apparatus according to claim 2, wherein the two lid portions respectively close the openings. The apparatus of claim 5.
The radiation imaging apparatus according to claim 2, wherein two side surfaces of the casing formed between the two lid portions are formed in an arc shape or a taper shape outward. The apparatus of claim 4.
The lid portion is formed on one side surface of the housing main body portion and closes an opening communicating with the hollow portion,
A radiation imaging apparatus, wherein a handle is provided on a side surface of the housing facing the lid. The apparatus of claim 4.
The lid portion is formed on one side surface of the housing main body portion and closes an opening communicating with the hollow portion,
A radiation imaging apparatus, wherein the lid is provided with a handle. The device according to any one of claims 4 to 8,
Of the plurality of surfaces, an irradiation surface to which the radiation is irradiated and a bottom surface facing the upper surface, which is the irradiation surface, are formed on the housing main body. The apparatus of claim 4.
Of the plurality of surfaces, an irradiation surface to which the radiation is irradiated or a bottom surface facing the upper surface which is the irradiation surface is formed on the lid portion. The device according to any one of claims 1 to 10,
The casing body and the lid are made of a conductive member, a conductive member is included in the casing body and the lid, or the casing body and the lid are A radiation imaging apparatus, wherein the conductive portion is configured by disposing a conductive member on a surface. The apparatus according to any one of claims 1 to 11,
A radiation imaging apparatus, wherein a buffer member that absorbs an external impact is provided on a side surface or a corner of the lid.

Images