JP2021015004A - Radiation detection device - Google Patents

Abstract

To provide a portable radiation detection device capable of dispersing external force and external pressure caused by external shocks and the like, and capable of expanding an imaging area by making a frame narrow.SOLUTION: The radiation detection device of the present invention is provided with a detection unit having an imaging panel that detects irradiation with radiation, and an exterior body that houses the detection unit. The exterior body has a first exterior wall that forms an incident surface of the radiation, a second exterior wall opposite the first exterior wall, and a third exterior wall and a fourth exterior wall, in which the third and fourth exterior walls connect the first and second exterior walls and are integrally formed in a cylindrical shape without seams. One end of the detection unit is in contact with the third exterior wall.SELECTED DRAWING: Figure 4

Description

The present invention relates to a portable radiation detector, and more particularly to a radiation detector suitable for mammography for performing radiography of the breast.

In the medical field, the CR (Computed Radiography) method using a bright fluorescent plate has become the mainstream from the previous screen film method, and the DR (Digital Radiography) method using an FPD (Flat Panel Detector) has become the mainstream. Is moving to. In particular, mammography, which captures radiographic images of the breast, has been attracting increasing interest in recent years for early diagnosis of breast cancer, and DR is being promoted.

In mammography photography, a breast is placed on a cassette such as an FPD, and a breast image is taken by irradiating radiation while compressing with a compression plate. Usually, the end of the cassette is pressed against the chest wall to capture the entire area up to the base of the breast. In order to alleviate the pain and discomfort given to the subject at this time, an FPD having a tubular outer body in which the portion in contact with the subject is seamlessly and smoothly formed has been proposed (for example, Patent Documents). 1).

Japanese Unexamined Patent Publication No. 2012-187436

However, in the tubular FPD disclosed in Patent Document 1 and the like, since the detection unit inserted in the exterior body includes a fragile glass substrate (for example, an imaging panel or a base), the detection unit and the exterior body By providing a gap between the two and the cushioning material, the image pickup panel and the like are protected from being damaged by a drop impact during transportation. Therefore, it is difficult to form a so-called narrow frame structure in which the photographing region (effective pixel region) extends to the vicinity of the end of the FPD, and further improvement is required.

An object of the present invention is to provide a portable radiation detection device capable of dispersing external force and external pressure due to an impact from the outside and expanding the imaging area by narrowing the frame.

The radiation detection device according to the present invention
A detection unit having an imaging panel that detects the irradiated radiation,
An exterior body for accommodating the detection unit and
The exterior body includes a first exterior wall forming an incident surface of the radiation, a second exterior wall facing the first exterior wall, and a third exterior wall connecting the first exterior wall and the second exterior wall. It has a tubular shape in which the wall and the fourth exterior wall are seamlessly and integrally formed.
One end of the detection unit is in contact with the third exterior wall.

According to the present invention, it is possible to disperse external force and external pressure due to an external impact or the like, and it is possible to expand the photographing area by narrowing the frame.

FIG. 1 is a diagram showing an X-ray imaging system for mammography to which a radiographic image detection device according to an embodiment of the present invention is applied. FIG. 2 is an external perspective view showing an example of an FPD. FIG. 3 is an exploded perspective view of the FPD housing (exterior body). 4A and 4B are cross-sectional views taken along the line AA in FIG. 2 of the FPD. FIG. 5 is a diagram showing the configuration of the TFT panel. 6A and 6B are views showing an example of lightening processing in the stiffening portion of the base. 7A to 7C are views showing a modified example of the contact mode between the detection unit and the housing.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing an X-ray imaging system S for mammography to which a radiographic image detection device according to an embodiment of the present invention is applied.

The X-ray imaging system S includes an FPD 1, an imaging control device 2, an X-ray generator 3, an imaging table 4, a compression plate 5, an AEC device 6 (AEC: Auto Exposure Control), and the like. The X-ray imaging system S visualizes the X-rays that have passed through the imaging target portion (here, the breast) of the subject M, and captures an X-ray image.

The FPD 1 is a portable medical X-ray detection device that detects X-rays irradiated from the X-ray generator 3 and transmitted through the subject M, and outputs an X-ray image signal. The FPD 1 is mounted on the photographing table 4 so that the X-ray incident surface is on the X-ray generator 3 side. The FPD 1 is communicably connected to the photographing control device 2 by, for example, wireless communication. The detailed configuration of FPD1 will be described later.

The photographing control device 2 controls the operations of the FPD 1 and the X-ray generator 3, acquires X-ray image data from the FPD 1, performs predetermined image processing, and displays the X-ray image. Further, the photographing control device 2 functions as a console for inputting X-ray irradiation conditions and instructing irradiation start / end.

The X-ray generator 3 is arranged at a position facing the FPD 1 with the subject M interposed therebetween. The X-ray generator 3 operates according to, for example, a control signal from the photographing control device 2, and when a high voltage is applied, X-rays are generated and irradiated toward the subject M. The X-ray generator 3 includes an X-ray movable diaphragm that adjusts the X-ray irradiation field.

The photographing table 4 detachably holds the FPD 1 so that the X-ray incident surface of the FPD 1 faces the X-ray generator 3. The compression plate 5 is arranged so as to face the FPD1 mounted on the photographing table 4 in the X-ray irradiation direction, and sandwiches the subject M between the FPD1 and the FPD1 in a compressed state.

The AEC device 6 is an automatic exposure mechanism that automatically adjusts the irradiation dose of X-rays. The AEC device 6 is built in, for example, the photographing table 4 and is communicably connected to the photographing control device 2. For example, in X-ray imaging, when the AEC device 6 detects the irradiation of a predetermined dose of X-rays, the imaging control device 2 stops the X-ray irradiation by the X-ray generator 3.

The imaging control device 2 is a picture archiving and communication system (PACS), a hospital information system (HIS), and a radiological information system (RIS) via a communication network. Systems) may be connected. In a communication network including a photographing control device 2, PACS, HIS and RIS, information is transmitted and received according to, for example, a DICOM (Digital Image and Communications in Medicine) standard.

When an X-ray image of a breast is taken by the X-ray imaging system S, the FPD 1 is attached to the imaging table 3, and the breast, which is the imaging target site, is placed between the imaging table 4 (FPD1) and the compression plate 5 on each of the left and right sides. Hold it between the two and irradiate X-rays in this state. The X-rays that have passed through the subject M are detected by the FPD 1 and transmitted as X-ray image data to the imaging control device 2. Then, an X-ray image of the breast is displayed on the imaging control device 2, and image interpretation is performed.

At this time, one end of the FPD1 is pressed against the chest wall in order to photograph the entire area up to the base of the breast. In the FPD 1 according to the present embodiment, the end portion on the side pressed against the subject M is narrowed, and the imaging area is expanded as compared with the conventional FPD (see, for example, Patent Document 1). The end of the FPD1 on the side pressed against the subject M is referred to as a "narrow frame side". A specific narrow frame structure in FPD1 will be described below.

FIG. 2 is an external perspective view showing an example of FPD1. FIG. 3 is an exploded perspective view of the housing 20 (exterior body) of the FPD 1.
As shown in FIG. 2, the FPD 1 includes a detection unit 10 that detects irradiated X-rays and outputs them as digital image data, and a housing 20 that houses the detection unit 10.

As shown in FIG. 3, the housing 20 includes a tubular outer body 21 having openings 21a and 21b, and lids 22 and 23 that cover and close the openings 21a and 21b of the outer body 21. The housing 20 is made of a non-conductive material such as plastic. In the present embodiment, the housing 20 is made of fiber reinforced plastics (FRP: Fiber Reinforced Plastics), preferably carbon fiber reinforced plastics (CFRP: Carbon FRP).

The exterior body 21 includes a first exterior wall 211 (top wall) forming an X-ray incident surface, a second exterior wall 212 (bottom wall) facing the first exterior wall 211, and first exterior walls 211 and second. The third exterior wall 213 and the fourth exterior wall 214 (side wall) connecting the exterior wall 212 have a tubular shape that is seamlessly and integrally formed. Further, the bent portion 21c in which the third exterior wall 213 is connected to the first exterior wall 211 and the second exterior wall 212 is formed in an R shape (see FIGS. 4A and 4B). The radius of curvature R of the bent portion 21c is, for example, 1 to 5 mm. In mammography photography, the FPD 1 is mounted on the imaging table 4 so that the third exterior wall 213 is on the narrow frame side.

Since the exterior body 21 is seamlessly and integrally formed and the bent portion 21c has an R shape, the external force and external pressure can be dispersed when an impact or the like is applied from the outside. , The pain and discomfort that the subject M receives can be alleviated.

For example, the exterior body 21 is formed by winding carbon fibers on a core material (mold) to obtain a desired thickness (for example, 1 mm to 2 mm), adjusting the shape, and then forming a thermosetting resin on the wound carbon fibers. Is formed by pouring, baking at high temperature and high pressure, molding, and then removing the core material. Further, for example, the exterior body 21 is formed with a rectangular plate-shaped member having a desired thickness and matching the developed length of the exterior body 21 of a predetermined size in advance, and the plate-shaped member is bent along the core material (mold). , The end faces may be bonded to each other with an adhesive or the like to form a tubular shape.
By forming the exterior body 21 by such a method, the dimensions of the inner circumference of the exterior body 21 are accurately determined by the dimensions of the outer circumference of the core material (mold), so that the exterior body 21 having no variation in dimensions can be easily obtained. Can be formed.

Further, on the exterior main body 21, a sign that can visually and / or tactilely identify the narrow frame side is arranged. In the present embodiment, stickers 215 are attached to two places along the side of the first exterior wall 211 on the narrow frame side and to the third exterior wall 213. As a result, when performing X-ray imaging of the breast, the narrow frame side of the FPD1 can be easily confirmed, and the FPD1 can be prevented from being placed in the wrong direction. In particular, by providing a sign on the third exterior wall 213, the narrow frame side can be confirmed even after the breast is arranged in the shape of FPD1.

In the above example, an example is shown in which a sign that can visually and / or tactilely identify the narrow frame side is formed by the individual seal 215, but it is narrowed to a part of the seal attached to a wide area of the exterior body 21. A sign indicating the frame side may be provided. For example, a sign indicating the narrow frame side may be provided on a part of the sticker attached to the first exterior wall 211, the third exterior wall 213, or the second exterior wall 212. By using a part of the sticker attached to the first exterior wall 211, the third exterior wall 213, or the second exterior wall 212 as a sign indicating the narrow frame side, it is possible to display with one sticker together with other signs. It becomes possible, and it becomes possible to show the sign more effectively.
Alternatively, the sticker including the sign indicating the narrow frame side may be attached so as to straddle at least two wall portions of the first exterior wall 211, the third exterior wall 213, and the second exterior wall 212. By sticking the sticker so as to straddle at least two wall portions, it is possible to eliminate a feeling of strangeness due to a step between the area where the sticker is stuck and the area where the sticker is not stuck.

The insertion portions 221 and 31 of the lids 22 and 23 are inserted into the openings 21a and 21b of the exterior body 21, respectively, and the openings 21a and 21b are closed by engaging the exterior body 21 and the lids 22 and 23, respectively. It is integrated as a housing 20 and the inside is sealed. The exterior body 21 and the lids 22 and 23 may be fixed by, for example, screwing, or may be fixed by adhesion.

It is preferable that a waterproof sealing member (not shown) made of rubber or the like is interposed between the exterior body 21 and the insertion portions 221 and 231 of the lids 22 and 23. As a result, the adhesion between the exterior main body 21 and the lids 22 and 23 is improved, and it is possible to prevent water and foreign matter such as dust, patient sweat, and disinfectant from entering the inside of the housing 20.

Various interface parts are arranged on the lids 22 and 23. The interface parts include a power switch 222 that switches the power ON / OFF, a charging terminal 223 that is connected to an external power source when charging a rechargeable battery (not shown) arranged inside the housing 20, and charging of the rechargeable battery. It includes an indicator 224 (for example, LED) that displays a status and various operation statuses, an antenna (not shown) for wirelessly transmitting and receiving information between the FPD1 and an external device, and the like. In the present embodiment, all of the interface parts are arranged on one lid 22, but all or a part of the interface parts may be arranged on the other lid 23.

The housing 20 is formed so that, for example, the thickness (height of the third exterior wall and the fourth exterior wall) in the X-ray irradiation direction is 15 mm. The thickness of the housing 20 is not limited to 15 mm, but is preferably 16 mm or less, and is a size (15 mm + 1 mm and 15 mm to 15 mm) conforming to the JIS standard (JIS Z 4905) in the conventional cassette for screen film. It is preferable that the size is within the range of 2 mm). The international standard corresponding to this JIS standard (JIS Z 4905) is IEC 60406.
Since most of the existing equipment such as the cassette for CR and the bucky table are made according to the JIS standard size in the cassette for this screen film, by matching the dimensions of the housing 20 to the JIS standard size, shooting with FPD1 The existing equipment can be used even when performing.

4A and 4B are cross-sectional views taken along the line AA in FIG. 2 of FPD1. FIG. 4B shows an enlarged end of the FPD1 on the narrow frame side.
As shown in FIGS. 4A and 4B, the detection unit 10 has an image pickup panel 11, a base 12, a circuit board 13, and the like, is housed in a housing 20, and is fixed in a state of being supported by, for example, ribs 32 and the like. Will be done. For example, the detection unit 10 may have an adhesive member such as a double-sided seal interposed between the X-ray incident surface and the housing 20, and may be fixed to the housing 20 by adhesion.

Although not shown, the inside of the housing 20 includes a communication unit (not shown) that transmits and receives various signals to and from an external device via the above-mentioned antenna, and a rechargeable battery that supplies power to the detection unit 10. Etc. are arranged.

The imaging panel 11 includes, for example, a scintillator 111 and a TFT (Thin Film Transistor) panel 112.
The scintillator 111 has, for example, a phosphor as a main component and emits electromagnetic waves having a wavelength of 300 to 800 nm, that is, light ranging from ultraviolet light to infrared light centered on visible light, based on incident X-rays.
The TFT panel 112 converts electromagnetic waves (light) radiated from the scintillator 111 into electric charges and accumulates them, and outputs an image signal based on the accumulated electric charges.

Specifically, as shown in FIG. 5, the TFT panel 112 extends the PD (Photo Diode) 113 and the TFT switch 114 arranged for each pixel P in the first direction (horizontal direction), and each TFT switch 114. Gate line GL connected to the gate electrode of the TFT, signal line SL extending in the second direction (vertical direction) intersecting the first direction and connected to the drain electrode of each TFT switch 114, and extending in the first direction. It has a bias line BL connected to each PD 113.
One end of the PD 113 is connected to the bias power supply via the bias wire BL, and the other end is connected to the source electrode of the TFT switch 114. Further, the signal line SL and the gate line GL are connected to the signal reading circuit 141 and the gate driving circuit 142, respectively.

Note that FIG. 5 shows a case where the configuration of the TFT panel 112 is simplified and the effective pixel area is composed of 4 × 4 pixels, but in reality, a large number of pixels P are matrixed according to the resolution of the FPD1. They are arranged in a shape.

When X-rays are incident on the image pickup panel 11, the phosphor of the scintillator 111 is excited and emits light with an intensity corresponding to the incident dose. The light emitted from the scintillator 111 is converted into electric charges by the PD 113 of the TFT panel 112 and accumulated. When a voltage for reading a signal is applied to the gate electrode of the TFT switch 114 by the gate drive circuit 142, the charges accumulated in the PD 113 are read out line by line and output to the signal read circuit 141. Then, the signal reading circuit 141 generates and outputs an X-ray image signal. The signal reading circuit 141 holds, for example, an integrator that stores charge in a capacitance and converts it into a voltage, an LPF circuit (LPF: Low Path Filter) that reduces noise contained in the output of the integrator, and an output voltage of the integrator. It has a CDS circuit (CDS: Correlated double sampling), an A / D converter that converts an analog voltage into a digital value, and the like.

The base 12 is a support that supports the image pickup panel 11. The image pickup panel 11 is fixed to the base 12 by adhesion, for example. The base 12 is made of, for example, FRP (preferably CFRP).

The circuit board 13 is composed of, for example, a flexible printed wiring board having flexibility, and is connected to the image pickup panel 11. An electronic component 14 is mounted on the circuit board 13, and the operation of the image pickup panel 11 is controlled by the electronic component 14. The circuit board 13 is arranged so as to wrap around the back side of the base 12 on the fourth exterior wall 214 side, and is supported by the rib 32, for example. The circuit board 13 may be fixed to the back surface of the base 12 (the surface opposite to the X-ray incident side), for example, by adhesion.

The electronic component 14 includes a CPU (Central Processing Unit) as a calculation / control device, a ROM (Read Only Memory) and a RAM (Random Access Memory) as a main storage device, a signal read circuit 141 (see FIG. 5), and a gate drive. Includes circuit 142 (see FIG. 5) and the like. The electronic component 14 may be provided with a rewritable read-only memory such as a flash memory so as to store the image signal output from the image pickup panel 11.

In the present embodiment, one end of the detection unit 10 on the side that contacts the chest wall (base of the breast) of the subject M at the time of imaging has a narrow frame structure. For example, one side surface of the base 12 is in direct contact with the inner surface of the third exterior wall 213 without using a cushioning member or the like. The image pickup panel 11 has the same size as the main surface of the base 12 (the surface that holds the image pickup panel 11), and the effective pixel area is close to the third exterior wall 213. Specifically, as shown in FIG. 4B, the effective pixel region of the imaging panel 11 extends to the outside (third exterior wall 213 side) of the R-shaped start point R1 of the bent portion 21c of the exterior body 21. There is.
As a result, a narrow frame structure is realized, and the photographing area is expanded as compared with the conventional FPD disclosed in Patent Document 1 and the like. Therefore, it becomes easy to acquire an X-ray image of the entire breast including the base of the breast, and a more accurate diagnosis can be made. Further, when the imaging area may be the same as the conventional one, the FPD1 may be pressed against the subject M with a smaller force, and the pain and discomfort received by the subject M can be reduced.

When the side surface of the base 12 is in contact with the third exterior wall 213 as in the present embodiment, the impact applied from the outside due to dropping or the like is directly transmitted from the exterior body 21 to the base 12. It becomes. In this regard, in the present embodiment, the base 12 is formed of FPR (preferably CFRP). As a result, it is less likely to be damaged as compared with the case where the base is made of glass, the impact resistance of the base 12 can be improved, and the weight can be reduced.

Further, the base 12 is provided with a stiffening portion 12a thicker than other portions (for example, a main surface portion) at a portion that comes into contact with the third exterior wall 213. As a result, the strength of the end portion of the base 12 is increased, so that deformation or breakage due to impact can be suppressed. Further, since the base 12 is not thickened as a whole but only the portion to which the impact is directly applied is thickened, the impact resistance can be efficiently improved while suppressing the weight increase.

Further, the stiffening portion 12a is preferably lightened (see FIGS. 6A and 6B, lightening portion 12b). FIG. 6A is a perspective view of the base 12 viewed from the main surface side (X-ray incident side), and FIG. 6B is a perspective view of the base 12 viewed from the back surface side.
The lightening process of the stiffening portion 12a may be performed from the main surface side of the base 12 as shown in FIG. 6A, or may be performed from the back surface side of the base 12 as shown in FIG. 6B. Good. As a result, the rib structure can enhance the robustness while suppressing the weight increase due to the stiffening portion 12a.

Further, a positioning member 31 (spacer) for pressing the detection unit 10 against the third exterior wall 213 for positioning is arranged between the detection unit 10 and the fourth exterior wall 214. The positioning member 31 is fixed to, for example, the other side surface of the base 12 (the side surface opposite to the narrow frame side) by adhesion. The material of the positioning member 31 is not particularly limited, but it may be made of an elastic resin material such as silicon or polyurethane so that the detection unit 10 does not interfere with the fourth exterior wall 214 and be damaged. preferable.
By inserting the detection unit 10 into the exterior body 21 while compressing the positioning member 31, one side surface (side surface on the narrow frame side) of the base 12 is pressed against the third exterior wall 213 and is positioned. A sliding material such as a PET (polyethylene terephthalate) film may be interposed between the positioning member 31 and the fourth exterior wall 214 so that the unit 10 can be easily inserted into the exterior body 21.

As described above, the FPD 1 (radiation detection device) according to the present embodiment includes a detection unit 10 having an imaging panel 11 for detecting irradiated X-rays, a housing 20 (exterior body) for accommodating the detection unit 10, and an exterior body. It has. The housing 20 has a first exterior wall 211 that forms an X-ray incident surface, a second exterior wall 212 that faces the first exterior wall 211, and a third that connects the first exterior wall 211 and the second exterior wall 212. The exterior wall 213 and the fourth exterior wall 214 have a tubular shape that is seamlessly and integrally formed, and one end of the detection unit 10 is in contact with the third exterior wall 213.

According to the FPD 1 according to the embodiment, since the exterior main body 21 has a seamless integrally molded tubular shape, external force and external pressure due to an external impact or the like can be dispersed. Further, since one end of the detection unit 10 is in contact with the third exterior wall 213, the effective pixel area is formed to the maximum near the end of the image pickup panel 11, and the shooting area is expanded by narrowing the frame. be able to. In particular, when FPD1 is used for mammography, it becomes easy to acquire an X-ray image of the entire breast including the base of the breast, so that an accurate diagnosis can be made. Further, when the imaging area may be the same as the conventional one, the FPD1 may be pressed against the subject M with a smaller force, so that the pain and discomfort suffered by the subject M can be reduced.

Although the invention made by the present inventor has been specifically described above based on the embodiment, the present invention is not limited to the above embodiment and can be changed without departing from the gist thereof.

For example, in the embodiment, the configuration in which the base 12 constituting the detection unit 10 abuts on the third exterior wall 213 of the housing 20 has been described, but the imaging panel 11 constituting the detection unit 10 is attached to the third exterior wall 213. They may be brought into contact with each other (see FIGS. 7A to 7C). In this case, the image pickup panel 11 is formed by using a flexible substrate instead of a glass substrate.

In the detection unit 10A shown in FIG. 7A, the image pickup panel 11 is bent and arranged along the first exterior wall 211 and the third exterior wall 213. As a result, the effective pixel area can be easily expanded to the vicinity of the third exterior wall 213, which is effective for narrowing the frame. Further, since the flexible imaging panel 11 is used, the weight can be reduced, the image is not easily damaged, and the reliability is improved.

Further, in the detection unit 10B shown in FIG. 7B, the image pickup panel 11 is bent and arranged along the first exterior wall 211, the third exterior wall 213, and the second exterior wall 212, and is a portion along the second exterior wall 212. Also, an effective pixel area is formed. As a result, the effective pixel region that wraps around the back surface side of the base 12 can be used as the AEC device.

Further, when the image pickup panel 11 is formed by using a flexible substrate, the image pickup panel 11 is not supported by the base 12 as in the detection unit 10C shown in FIG. 7C, but is attached to the exterior body 21. 11 can also be pasted and fixed. In this case, the weight can be reduced by the amount of the base 12. Further, the distance between the image pickup panel 11 and the subject M is reduced, and the influence of glare and the like can be reduced.

Further, in the embodiment, the configuration in which the thickness of the exterior main body 21 is the same has been described, but the thickness of the exterior main body 21 may be different from each other.
For example, when the thickness of the first exterior wall 211 on the X-ray incident side is reduced, the distance between the image pickup panel 11 and the subject M becomes smaller, and the influence of glare or the like can be reduced.
Further, for example, when the thickness of the third exterior wall 213 on the narrow frame side is reduced, the photographing area can be further expanded.

Further, in the embodiment, the configuration in which the AEC device 6 is built in the imaging table 4 of the X-ray imaging system S has been described, but the AEC apparatus may be arranged in the FPD 1.
For example, a recess corresponding to the outer shape of the AEC device is provided on the surface of the second exterior wall 212, and the AEC device is arranged in this recess. In this case, by arranging the AEC device in a detachable manner, the recess can be used as a gripping portion when transporting the FPD1.

Further, the present invention is not limited to the use of mammography, and can be applied to the case of taking an X-ray image of a part other than the breast (for example, chest, abdomen, etc.). In this case, it is preferable to arrange a thickness adjusting member such as a cap or a bumper at the end on the narrow frame side so that the distance from the center of the imaging region of the radiation detection device to both ends is the same. As a result, the radiography apparatus can be easily arranged at a predetermined position on the imaging table without worrying about the narrow frame structure.

Further, in the embodiment, the indirect conversion type FPD has been described as an example, but the present invention can also be applied to the direct conversion type FPD that absorbs radiation and directly converts it into electric charge.

Further, the present invention can be applied not only to an X-ray imaging system but also to an imaging system using other radiation such as γ-rays.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 FPD (Radiation Detector)
10 Detection unit 11 Imaging panel 12 Base 13 Circuit board 14 Electronic components 20 Housing (exterior body)
21 Exterior body 22, 23 Lid 211 1st exterior wall 212 2nd exterior wall 213 3rd exterior wall 214 4th exterior wall X-ray imaging system

Claims (8)

A detection unit having an imaging panel that detects the irradiated radiation,
An exterior body for accommodating the detection unit and
The exterior body includes a first exterior wall forming an incident surface of the radiation, a second exterior wall facing the first exterior wall, and a third exterior wall connecting the first exterior wall and the second exterior wall. It has a tubular shape in which the wall and the fourth exterior wall are seamlessly and integrally formed.
One end of the detection unit is in contact with the third exterior wall.
Radiation detector. The exterior body has an R shape at a bent portion connecting the third exterior wall, the first exterior wall, and the second exterior wall.
The radiation detection device according to claim 1, wherein the effective pixel region of the imaging panel extends to the outside of the start point of the R shape on the first exterior wall and the second exterior wall. The detection unit includes a base that holds the imaging panel and abuts on the third exterior wall.
The radiation detection device according to claim 1 or 2, wherein the base is made of fiber reinforced plastic. The radiation detection device according to claim 3, wherein the base has a stiffening portion thicker than other portions at a portion that comes into contact with the third exterior wall. The radiation detection device according to claim 4, wherein the stiffening portion is lightened. The radiation detection apparatus according to any one of claims 1 to 5, wherein the imaging panel is flexible and is bent and arranged along the first exterior wall and the third exterior wall. .. The imaging panel is bent and arranged along the first exterior wall, the third exterior wall, and the second exterior wall, and an effective pixel region is formed in a portion along the second exterior wall. Item 6. The radiation detection device according to item 6. The radiation according to any one of claims 1 to 7, wherein a positioning member for pressing the detection unit against the third exterior wall and positioning the detection unit is arranged between the detection unit and the fourth exterior wall. Detection device.

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