JP7540363B2 - Radiography equipment - Google Patents

Description

The present invention relates to a radiological imaging device.

Portable panel-shaped radiographic imaging devices are often carried to the imaging location each time an image is taken. For this reason, portable radiographic imaging devices are provided with a handle to make them easier to carry.

For example, Patent Document 1 describes a radiography device that includes a radiation detection panel and a rectangular parallelepiped housing that houses the radiation detection panel. It further describes that a recessed gripping portion is formed in the peripheral area of the rear surface of the housing of the radiography device, which is located on the opposite side to the front surface where radiation is incident, and that the gripping portion has a depth of at least half the distance between the front surface and the rear surface, or that the gripping portion has a depth of at least the distance between the rear surface and the center of gravity of the radiography device.

JP 2017-67564 A

However, the radiation imaging device in Patent Document 1 has a structure in which, for example, a cushioning material is provided between the side surface of the housing and the module in order to prevent damage to the internal module provided inside the radiation imaging device when the radiation imaging device receives an external impact, which places restrictions on the shape and arrangement of the gripping part.
In addition, in recent years, various infectious diseases have become prevalent, and in order to prevent in-hospital infections through the radiographic imaging device, it is recommended that the radiographic imaging device be placed in a plastic bag for preventing infection and that the plastic bag be changed for each patient. However, placing the radiographic imaging device in a plastic bag for preventing infection causes slippage and makes it difficult to hold. Therefore, as in the radiographic imaging device in Patent Document 1, a concave gripping portion is provided so that the fingers can be hooked, making it easier to hold. However, given the manufacturing constraints described above, it has been difficult to manufacture a radiographic imaging device that is easy to hold from any direction.

The present invention was made in consideration of the above problems, and aims to provide a radiographic imaging device that is resistant to damage even when subjected to external impact and is easy to hold from any direction.

In order to solve the above problems, the radiation image capturing apparatus of the present invention as set forth in claim 1 comprises:
a radiation detector having a converter for converting radiation into an electrical signal and a support for supporting the converter;
a housing that is rectangular in plan view and that houses the radiation detector;
The radiation detector is fixed to an inner surface of the housing on which radiation is incident ,
a rear surface of the housing opposite to a surface into which radiation is incident has a concave grip portion provided at least along each side of the rear surface of the housing ;
The gripping portion is provided such that an inner surface of the gripping portion and the support body are in contact with each other in a direction parallel to a surface of the housing on which radiation is incident .

The present invention provides a radiographic imaging device that is resistant to damage even when subjected to external impact and is easy to hold from any direction.

1 is a perspective view of a front and a part of a side of a radiographic image capturing apparatus according to an embodiment of the present invention; 1 is a perspective view of a rear and a part of a side of a radiographic image capturing apparatus according to an embodiment of the present invention; 2 is a cross-sectional view of the radiation image capturing apparatus of FIG. 1A taken along line II-II. 1B is a cross-sectional view of a gripping portion of the radiation image capturing apparatus taken along line II-II of FIG. 1A, the cross-sectional view being turned upside down. 11A and 11B are diagrams illustrating gripping forces when the radiographic image capturing device is gripped. FIG. 13 is a diagram showing the experimental results of the ratio of gripping force to gripping depth and the tearing of a plastic bag. FIG. 3 is a partial cross-sectional view of FIG. 2 . FIG. 2 is a plan view illustrating an example of a photoelectric conversion unit. FIG. 2 is a diagram showing the radiation image capturing device without a cover as viewed from the rear. FIG. 2 is an upside-down cross-sectional view of the radiation image capturing device according to the first modified example, taken along line II-II, in a state in which the internal module has been peeled off from the front surface. FIG. 11 is a rear view of a radiographic image capturing device according to Modification 2. FIG. 13 is a side view of the radiographic image capturing apparatus according to Modification 3 during one-shot long imaging. FIG. 13 is a rear view of the radiographic imaging device according to Modification 3 during one-shot long imaging. FIG. 13 is a side view of the radiation image capturing device 100 mounted on a medical cart according to a fourth modified example. FIG. 13 is a rear view of the radiographic image capturing device 100 according to the fourth modified example.

The following describes an embodiment of the present invention with reference to the drawings. However, the present invention is not limited to what is shown in the drawings.

First, a schematic configuration of a radiographic image capturing apparatus 100 according to this embodiment will be described.
The radiation image capturing device 100 is for generating a radiation image according to received radiation.

[1. Housing]
The radiographic imaging device 100 includes a housing 110 that is rectangular in plan view, and Fig. 1A is a perspective view of a front surface 110a and a portion of a side surface 110c into which radiation is incident of the housing 110. Fig. 1B is a perspective view of a rear surface 110b and a portion of a side surface 110c opposite the front surface 110a of the housing 110.
1B, the rear surface 110b of the housing 110 has a circumferentially concave grip portion 7 provided along each side in the peripheral region of the rear surface 110b. Providing the grip portion 7 along each side of the rear surface 110b enables the radiographic imaging device 100 to be held in various orientations. In addition, when the radiographic imaging device 100 is inserted under a subject to capture an image, the radiographic imaging device 100 can be easily gripped by the grip portion 7 even when the radiographic imaging device 100 is not visible when the radiographic imaging device 100 is pulled out after capture, which increases the photographer's freedom and reduces the burden of capture.
A connector 51 is provided on a side surface 110c of the housing 110 for supplying power from an external device via a wired connection and for communicating with the outside.

FIG. 2 is a cross-sectional view of the radiation image capturing apparatus 100 shown in FIG. 1A taken along line II-II.
As shown in FIG. 2, the housing 110 houses an internal module 120 which is a radiation detector.
The housing 110 includes a box body 1 and a cover body 2, and is in the form of a rectangular panel.

Moreover, the housing 110 is formed from a material that does not impede the transmission of radiation.
The material of the housing 110 is carbon fiber reinforced plastic (CFRP) containing short fibers.
This allows the material of the housing 110 to stretch well when molding the grip portion 7, making it easier to form the grip portion 7.
The material of the housing 110 may be carbon fiber reinforced resin containing short fibers only for the cover 2 or only for the gripping portion 7, and other parts may be made of a different material. Examples of the different material include glass fiber reinforced plastic (GFRP), light metal or alloy containing light metal, carbon fiber reinforced thermoplastic resin (CFRTP), etc. In addition, when the material of the housing 110 is carbon fiber reinforced (thermoplastic) resin or glass fiber reinforced resin, it may be formed using SMC (Sheet Molding Compound), which is a material containing shorter fibers than prepreg.
Light metals include metals with relatively low specific gravity such as aluminum and magnesium.
This allows the housing 110 to be made lighter while maintaining its rigidity.
In particular, carbon fiber reinforced resin has a high radiation transmittance, so that the radiation that has passed through the subject reaches the internal module 120 without being attenuated on the way. Therefore, the image quality of the radiographic image can be made higher than when the housing 110 is made of other materials.

Additionally, the housing 110 may be treated with an antibacterial coating, either on the entire surface or incorporated into the material itself.
Furthermore, the housing 110 may be provided with protective members at the corners (at least one of the four corners of the front surface 11 and the four corners of the rear surface 21).
The material of the protective member may be metal, but since the radiographic imaging device 100 according to this embodiment is lightweight and receives little impact in the event of a collision, the protective member may be made of an elastic material (such as resin, rubber, or elastomer).
At least one of the protective members may be different from the other protective members in at least one of the color and the shape. In this way, the orientation of the radiation image capturing device 100 can be easily identified based on the position of the protective member that is different from the other protective members in at least one of the color and the shape.

[1-1. Box]
The box 1 has a front portion 11 and a side portion 12 .
The front portion 11 and the side portion 12 are integrally formed.
The front surface portion 11 and the side surface portion 12 may be separate members.

(1-1-1. Front part)
The front surface 11 faces an imaging surface 312g (described later) provided in the internal module 120, and extends in parallel to the imaging surface 312g.
The outer surface of the front surface portion 11 serves as a radiation incident surface 110a (front surface) of the radiographic image capturing device 100 (housing 110).
The front surface 11 is formed in a rectangular plate shape.
Also, on the radiation incident surface 110a, the range of the effective image area (area where a plurality of semiconductor elements 312b (see FIG. 6) are arranged) of the sensor panel 31 (see FIG. 5) which is a converter is indicated by a frame (not shown). It has been done.

(1-1-2. Side part)
The side surface portion 12 extends from the peripheral edge of the front surface portion 11 in a direction perpendicular to the radiation entrance surface 110a and in a direction toward the rear surface portion 21.
The outer surface of the side surface portion 12 becomes a side surface 110c of the radiographic image capturing device 100 (housing 110).

[1-2. Lid]
The cover 2 has a rear surface 21 .
The cover body 2 according to this embodiment entirely constitutes the rear surface portion 21 .
The rear surface portion 21 faces the front surface portion 11 of the box body 1 with the internal module 120 interposed therebetween, and extends parallel to the front surface portion 11, and is provided with a concave grip portion 7.
The outer surface of the rear surface portion 21 becomes the rear surface 110b of the radiographic image capturing device 100 (housing 110).

(1-2-1. Grip part)
FIG. 3 is a cross-sectional view of the gripping unit 7 taken along line II-II of the radiation image capturing device 100 shown in FIG. 1, turned upside down.
3 shows an example of the position and shape of the grip 7. In the example shown in FIG. 3, the area (area B) from the end of the housing 110, which is the side surface 110c of the housing 110, to the start of the grip 7 is The length is set to 25 mm or less. By setting the dimension of the B region to 25 mm or less, when the radiation image capturing device 100 is inserted under the subject to capture an image, the radiation image capturing device 100 can be pulled out without being deeply inserted. No need to insert your hands, it's easy to pull out.
The length of the region (region C) between the start and end of the gripping portion 7 may be long enough for a finger to fit in, for example, 15 to 30 mm.
In the example shown in FIG. 3, the depth of the gripping portion 7 is designated as D.

Here, Fig. 4A is a diagram showing the gripping force when gripping the gripping portion 7. Fig. 4B also shows the ratio of the gripping force shown in Fig. 4A to the depth D of the gripping portion 7 when the radiographic image capture device 100 is gripped without being placed in a plastic bag for preventing infection, the ratio of the gripping force shown in Fig. 4A to the depth D of the gripping portion 7 when the radiographic image capture device 100 is gripped while placed in a plastic bag, and the results of an experiment on whether the plastic bag is torn when the radiographic image capture device 100 is gripped while placed in the plastic bag.
In the experiment for which the experimental results shown in Fig. 4B were obtained, a radiographic imaging device 100 having dimensions (length, width, thickness) of approximately 460 mm x 380 mm x 15 mm and weighing approximately 2.6 kg was used. A typical commercial vinyl bag having a thickness of 0.02 mm and made of low-density polyethylene was also used.
In the experimental results of FIG. 4B, the depth D of the gripping portion 7 is 0 mm, and the gripping force ratio when there is no plastic bag is set to 100.
When the depth D of the gripping portion 7 is 0 mm, the gripping force ratio without a plastic bag is 100, and the gripping force ratio with a plastic bag is 199. Slippage occurs due to the plastic bag, and the gripping force ratio with a plastic bag is greater than the gripping force ratio when the depth D of the gripping portion 7 is 0 mm and no plastic bag is used. Therefore, a greater gripping force is required to grip the radiographic imaging device 100. Furthermore, when the depth D of the gripping portion 7 is 0 mm, the plastic bag does not break.
Furthermore, when the depth D of the gripping portion 7 is 2 mm, the gripping force ratio without a plastic bag is 81, and the gripping force ratio with a plastic bag is 115. As in the case where the depth D of the gripping portion 7 is 0 mm, the gripping force ratio with a plastic bag is greater than the gripping force ratio with the depth D of the gripping portion 7 being 0 mm and without a plastic bag. Therefore, a greater gripping force is required to grip the radiographic imaging device 100. Furthermore, when the depth D of the gripping portion 7 is 2 mm, the plastic bag does not break.
Furthermore, when the depth D of the gripping portion 7 is 4 mm, the gripping force ratio without a plastic bag is 55, and the gripping force ratio with a plastic bag is 75. The gripping force ratio with a plastic bag is smaller than the gripping force ratio with a plastic bag when the depth D of the gripping portion 7 is 0 mm and no plastic bag is present. Therefore, the gripping force required to grip the radiographic imaging device 100 in this case is smaller than the gripping force ratio with a depth D of the gripping portion 7 of 0 mm and no plastic bag is present. Furthermore, when the depth D of the gripping portion 7 is 4 mm, the plastic bag does not tear.
Furthermore, when the depth D of the gripping portion 7 is 6 mm, the gripping force ratio without a plastic bag is 39, and the gripping force ratio with a plastic bag is 51. As in the case where the depth D of the gripping portion 7 is 4 mm, the gripping force ratio with a plastic bag is smaller than the gripping force ratio with the depth D of the gripping portion 7 being 0 mm and without a plastic bag. Therefore, the gripping force required to grip the radiographic imaging device 100 in this case is smaller than the gripping force ratio with the depth D of the gripping portion 7 being 0 mm and without a plastic bag. Furthermore, when the depth D of the gripping portion 7 is 6 mm, the plastic bag does not break.
In addition, when the depth D of the gripping portion 7 is 8 mm, the ratio of the gripping force without a plastic bag is 29, and the ratio of the gripping force with a plastic bag is impossible to measure because the shape of the subjects' nails caused the plastic bag to tear.
From the above results, the depth D of the gripping portion 7 is set to 4 mm or more and less than 8 mm. By doing so, even if the radiographic imaging device 100 is covered with a plastic bag for preventing infection, the gripping portion 7 will not be too deep and the plastic bag will not tear, and the gripping portion 7 will not be too shallow and will not slip, so that the gripping portion 7 can be appropriately gripped.

In addition, the cover 2 (rear portion 21 ) abuts against the side portion 12 of the box 1 and is attached to the side portion 12 .
As a result, the side portion 12 connects the front portion 11 and the rear portion 21 .
The lid 2 according to this embodiment is fixed to the box 1 with screws.
Therefore, when repairing or maintaining the radiographic imaging device 100, the rear part 21 can be separated from the front part 11 and the side part 12 simply by loosening and removing the screws. In other words, a person performing maintenance on the radiographic imaging device 100 can easily access the internal module 120 housed by the front part 11 and the side part 12.
Moreover, a waterproof structure may be achieved by inserting a packing between the lid 2 and the box 1 and screwing or gluing it in place. By preventing moisture from entering, it is possible to prevent the foam from absorbing water and affecting the sensor panel and electrical components.

[1-3. Other]
Note that Figure 2 illustrates an example of a housing 110 (box body 1) in which the side portion 12 is integrally formed with the front portion 11, but the housing 110 may be one in which the side portion 12 is integral with the rear portion 21, or the front portion 11, side portion 12, and rear portion 21 may each be separate components.
Also, both the front portion 11 and the rear portion 21 may have side portions.
In addition, Figure 2 illustrates an example of a housing 110 having a box body 1 and a lid body 2, but the housing may also include a cylindrical body having a front portion 11, a rear portion 21, and a pair of side portions 12 connecting both ends of the front portion 11 and both ends of the rear portion 21, and a lid body that closes the opening of the cylindrical body.

2. Internal Module
The internal module 120 is fixed to the inner surface of at least one of the front surface 11 , the rear surface 21 and the side surface 12 of the housing 110 .
The internal module 120 according to this embodiment is fixed to the inner surface of the front portion 11 as shown in FIG.
Methods for fixing the internal module 120 to the housing 110 include bonding using an adhesive, adhesion using an adhesive tape, fitting into a recess or protrusion formed on the inner surface, engaging with an engaging portion formed on the inner surface, etc.
This makes it possible to suppress movement of the internal module 120 and prevent damage to the internal module 120 when an impact is received from a direction substantially perpendicular to the side surface 110c of the radiographic image capturing device 100. In addition, it is not necessary to provide a side cushioning material and a reinforcing portion for reinforcing the side cushioning material near the inner surface of the side surface portion 12, and a space for providing the grip portion 7 can be secured inside the radiographic image capturing device 100.

The internal module 120 may be fixed to the inner surface of the rear portion 21 or the inner surface of the side portion 12 .
In addition, the internal module 120 may be fixed to the inner surface of the front portion 11 and the inner surface of the rear portion 21, the inner surface of the front portion 11 and the inner surface of the side portion 12, and the inner surface of the side portion 12 and the inner surface of the rear portion 21, respectively.
In addition, the internal module 120 may be fixed to the inner surface of the front portion 11 , the inner surface of the side portion 12 , and the inner surface of the rear portion 21 .

2, the internal module 120 according to this embodiment is spaced apart from the inner surface of the side portion 12 by a predetermined distance d or more. That is, there is a gap between the internal module 120 and the side portion 12, the width of which is d or more.
In this way, the radiological imaging device 100 can prevent the internal module 120 from colliding with the side portion 12 and being damaged when the radiological imaging device 100 receives an impact from a direction approximately perpendicular to the side 110c of the radiological imaging device 100.

The internal module 120 includes a radiation detection unit 3, a support member 4 as a support body, and an electrical component 5. The internal module 120 may also include a fixing layer 6, which will be described later.

[2-1. Radiation detection unit]
As shown in FIG. 2 , the radiation detection unit 3 is provided between the front surface 11 of the housing 110 and the support member 4 .
The radiation detection unit 3 according to this embodiment is provided between the front surface unit 11 and the support member 4 via a fixing layer 6 .
As shown in FIG. 5 , the radiation detection unit 3 includes a sensor panel 31 , a radiation shielding layer 32 , and an electromagnetic field shielding layer 33 .

(2-1-1. Sensor panel)
The sensor panel 31 according to this embodiment is provided between a radiation shielding layer 32 and an electromagnetic field shielding layer 33 .
The sensor panel 31 according to this embodiment also includes a wavelength conversion section 311 and a photoelectric conversion section 312 .

The wavelength conversion section 311 is for converting radiation into visible light or the like.
The wavelength conversion section 311 according to this embodiment is provided between the electromagnetic field shield layer 33 and the photoelectric conversion section 312 .
Moreover, the wavelength conversion section 311 according to this embodiment is disposed so as to extend in parallel with the radiation entrance surface 110 a of the housing 110 .
Moreover, the wavelength conversion portion 311 according to this embodiment has a support layer and a phosphor layer, which are not shown.

The support layer is made of a flexible material and has a film shape (thin plate shape).
Examples of the flexible material include polyethylene naphthalate, polyethylene terephthalate (PET), polycarbonate, polyimide, polyamide, polyetherimide, aramid, polysulfone, polyethersulfone, fluororesin, polytetrafluoroethylene (PTFE), or a composite material made by mixing at least two or more of these.
Of the above materials, polyimide, polyamide, polyetherimide, PTFE, or a composite material thereof is particularly preferred from the viewpoint of improving heat resistance.
Moreover, the support layer according to this embodiment is formed in a rectangular shape.

The phosphor layer is formed of a phosphor on the surface of the support layer.
A phosphor is a substance that emits light by exciting atoms when irradiated with ionizing radiation such as α-rays, γ-rays, X-rays, etc. In other words, a phosphor converts radiation into ultraviolet light or visible light.
The phosphor may be, for example, columnar crystals of cesium iodide (CsI).

The phosphor layer according to this embodiment is formed on the entire surface of the support layer facing the photoelectric conversion section 312 .
That is, the wavelength converting portion 311 is formed in a rectangular shape.
Moreover, the phosphor layer according to this embodiment has a thickness that allows it to bend (elastically deform) together with the support layer when the support layer is bent.

The wavelength conversion section 311 configured in this manner is in the form of a flexible plate, and the area exposed to radiation emits light with an intensity corresponding to the dose of radiation received.

The photoelectric conversion section 312 serves to convert light into an electrical signal.
The photoelectric conversion section 312 according to this embodiment is provided between the wavelength conversion section 311 and the radiation shielding layer 32 .
Moreover, the photoelectric conversion section 312 according to this embodiment is disposed so as to extend in parallel with the wavelength conversion section 311 .
The photoelectric conversion section 312 is bonded to the wavelength conversion section 311 .
As shown in FIG. 6, the photoelectric conversion unit 312 includes a substrate 312a, a plurality of semiconductor elements 312b, a plurality of scanning lines 312c, a plurality of signal lines 312d, a plurality of switching elements 312e, and a plurality of bias lines 312f.

The substrate 312a is made of a flexible material and has a film shape (thin plate shape).
The front view of the substrate 312 a according to this embodiment has a rectangular shape that is substantially the same as that of the wavelength conversion section 311 .
The substrate 312 a according to this embodiment is made of the same material as the support layer of the wavelength conversion section 311 .
That is, the substrate 312a according to this embodiment is flexible, and its thermal expansion coefficient and thermal contraction coefficient are equal to those of the support layer.
For this reason, when the photoelectric conversion unit 312 thermally expands, the wavelength conversion unit 311 also thermally expands, making it difficult for the laminate of the photoelectric conversion unit 312 and the wavelength conversion unit 311 to warp. As a result, there is no misalignment between the light emitting position of the wavelength conversion unit 311 and the opposing semiconductor element 312b, making it possible to prevent deterioration in the image quality of the radiation image.
The substrate 312a may be formed from a material that has the same thermal expansion coefficient and thermal contraction coefficient as the support layer, but is different from the support layer.

Each of the semiconductor elements 312b generates an amount of charge according to the intensity of the light received.
Furthermore, the multiple semiconductor elements 312b are formed so as to be distributed two-dimensionally on the surface of the substrate 312a.
Specifically, the multiple semiconductor elements 312 b are arranged in a matrix on the surface of the substrate 312 a that is in contact with (bonded to) the wavelength converting portion 311 .
The semiconductor elements 312b according to this embodiment are arranged in a matrix in the center of the imaging surface 312g. Specifically, the semiconductor elements 312b are arranged in a plurality of rectangular regions (corresponding to the pixels of the radiation image) surrounded by a plurality of scanning lines 312c (not shown) formed on the surface of the substrate 312a so as to be equally spaced and extend parallel to one another, and a plurality of signal lines 312d (not shown) formed so as to be equally spaced and perpendicular to the scanning lines.
A switch element 312e is provided in each rectangular region. The switch element 312e is formed of, for example, a TFT, and the gate of each switch element 312e is connected to the scanning line 312c, the source is connected to the signal line 312d, and the drain is connected to the semiconductor element 312b.

Hereinafter, the surface of the substrate 312a on which the semiconductor element 312b is formed is referred to as an imaging surface 312g.
The photoelectric conversion section 312 configured in this manner has flexibility, and is disposed so that the imaging surface 312 g on which the semiconductor element 312 b is formed faces the wavelength conversion section 311 .

In addition, by forming the sensor panel 31, which is composed of the wavelength conversion unit 311 and the photoelectric conversion unit 312, from a flexible material as described above, the sensor panel 31 is less likely to be damaged even if the radiographic imaging device 100 receives an impact, and the sensor panel 31 can be made lighter.

(2-1-2. Radiation shielding layer)
The radiation shielding layer 32 is intended to prevent scattered radiation from reaching the electrical circuitry 52 .
As shown in FIG. 5 , the radiation shielding layer 32 according to this embodiment is provided between the sensor panel 31 (photoelectric conversion section 312 ) and the electromagnetic field shielding layer 33 .
Moreover, the radiation shielding layer 32 according to this embodiment fixes the sensor panel 31 by means of an attachment portion (not shown).

(2-1-3. Electromagnetic field shield layer 33)
The electromagnetic field shield layer 33 serves to shield against noise.
The electromagnetic field shield layer 33 is provided on at least one of the imaging surface 312g of the radiation detection unit 3 and the surface opposite to the imaging surface 312g.
As shown in FIG. 5, the electromagnetic field shield layer 33 according to this embodiment is provided on both the imaging surface 312g side and the opposite surface side.
The electromagnetic field shielding layer 33 on the imaging surface 312g side is attached to the inner surface of the front surface 11 by a fixing layer 6, and the electromagnetic field shielding layer 33 on the surface opposite the imaging surface 312g is attached to the support member 4 by the fixing layer 6.

The electromagnetic field shield layer 33 is a layer member that partially contains a conductive material.
The electromagnetic field shield layer 33 according to this embodiment includes a resin film having a metal layer formed on the surface thereof, a film made of a transparent conductive material (such as indium tin oxide (ITO)), and the like.
Metals include, for example, aluminum and copper.
Methods for forming the metal layer include, for example, a method of attaching a metal foil, a method of depositing a metal, and the like.
For the electromagnetic field shield layer 33, a film such as Alpet (registered trademark, Panac Corporation) is suitable.
At least one electromagnetic shield layer 33 is provided on one surface.

If the electromagnetic field shield layer 33 is provided on the imaging surface 312g side, it is possible to shield external noise entering from the front surface portion 11 side.
On the other hand, if the electromagnetic field shield layer 33 is provided on the side opposite to the imaging surface 312g, noise generated by the electric circuit 52 can be shielded.

The electromagnetic shield layer 33 may be connected to, for example, ground (GND), so that the potential of the electromagnetic shield layer 33 is kept constant, and the noise shielding effect can be further improved.
In this case, it is preferable to interpose a metal (eg, nickel) whose ionization tendency is small compared to that of aluminum or copper.
The metal with a small difference in ionization tendency is interposed, for example, in the form of an intermediate member plated with a metal with a small difference in ionization tendency, or in the form of a conductive tape containing a metal with a small difference in ionization tendency as a conductive filler.
When metals with a large difference in ionization tendency (for example, aluminum and copper) come into contact with each other, electrolytic corrosion may occur, but by doing so, electrolytic corrosion can be prevented.

(2-1-4. Fixed layer)
As shown in FIG. 5, the fixing layer 6 includes an adhesive layer 61 and a buffer material 62 .
The adhesive layer 61 is made of an adhesive, an adhesive tape, or the like.
The cushioning material 62 is provided between the adhesive layers 61 and serves to absorb external loads and shocks.
The fixed layer 6 is provided between the front surface 11 of the housing 110 and the electromagnetic field shield layer 33 .
This makes it possible to prevent the load or impact received from the front surface 11 side from being transmitted to the sensor panel 31 .
The fixed layer 6 is provided between the electromagnetic field shield layer 33 and the support member 4 .
This makes it possible to prevent a load or impact received from the rear surface portion 21 side from being transmitted to the sensor panel 31 .

2-2. Support Member
The support member 4 supports the radiation detection unit 3 .
The term "support" here includes not only supporting the radiation detection unit 3 against the load received from the front surface portion 11 side, but also providing the radiation detection unit 3 on the support member 4.
As shown in FIG. 2, the support member 4 is provided between the radiation detection unit 3 and the rear surface unit 21 .
In this manner, the support member 4 distributes the load received by the housing 110 from the outside, making it possible to prevent the radiation detection unit 3 (sensor panel 31) from bending.

The support member 4 is made of a foam.
By doing this, the internal module 120 including the support member 4 can be made lighter than when it is formed from metal or non-foamed resin, and the load on the fixing layer 6 can be reduced even if the radiographic imaging device 100 receives an impact from the outside.
The material of the foam includes any one of polyethylene, polypropylene, polystyrene, modified polyphenylene ether, polyurethane, acrylic, and epoxy.
In general, soft resins have lower rigidity than hard resins. On the other hand, it is known that the lower the expansion ratio of a foam made of a soft resin, the higher its rigidity. Therefore, the required rigidity can be obtained by adjusting the expansion ratio when producing the foam.
The foaming ratio is preferably, for example, equal to or less than 30. In this way, the support member 4 can be made lighter while obtaining the necessary rigidity without using a material (for example, fiber-reinforced resin or metal) having a higher rigidity than the foam in a part (for example, a surface layer) of the support member 4.

The support member 4 may be formed from a resin whose thermal expansion coefficient is the same as that of the sensor panel 31 or whose difference therebetween is within a predetermined range.
The support member 4 may also be elastic.
The sensor panel 31 has a larger coefficient of thermal expansion than a conventional panel equipped with a glass substrate. However, if the above-described structure is adopted, even if the sensor panel 31 expands, the support member 4 also expands to the same extent or elastically deforms to absorb the expansion of the sensor panel 31, so that it is possible to prevent the sensor panel 31 from expanding alone and causing wrinkles in the sensor panel 31.

As shown in Figures 2 and 7, the support member 4 has a planar support portion 4a and three leg-shaped support portions 4b.

(2-2-1. Planar support part)
The planar support portion 4a is a surface of the photoelectric conversion portion 312 of the sensor panel 31 opposite to the imaging surface 312g (a surface of the electromagnetic field shield layer 33 on the surface of the photoelectric conversion portion 312 opposite to the imaging surface 312g or a fixed The insulating layer 6 is provided without any gaps along the entire surface of the insulating layer 6 .
The planar support portion 4a has a predetermined thickness in a direction perpendicular to the surface opposite to the imaging surface 312g, and is in the form of a plate extending parallel to the surface. Since the support member 4 further disperses the load received by the support 110 from the outside, the deflection of the radiation detection unit 3 can be further suppressed.

One surface of the planar support portion 4 a contacts the radiation detection portion 3 , and the other surface of the planar support portion 4 a contacts the electric circuit 52 .
Hereinafter, one surface of the planar support portion 4a that contacts the radiation detection portion 3 will be referred to as a support surface 41a.
The support surface 41a according to this embodiment is the same as or slightly larger than the sensor panel 31. Therefore, the planar support portion 4a can support the sensor panel 31 in its entirety.
The thickness of the planar support portion 4a (the distance between the support surface 41a and the surface opposite thereto) is preferably within a range of 2 to 5 mm, which ensures the rigidity of the planar support portion 4a while also providing a space for mounting the electric circuit 52 described below.

2 shows an example of the planar support portion 4a having a uniform thickness (width in the direction perpendicular to the support surface 41a), but the planar support portion 4a may have a periphery in the direction along the support surface 41a that is thicker than the center portion. In this way, the rigidity against loads and impacts can be further increased.
Furthermore, the planar support portion 4a may be thicker in the center than in the peripheral portion.

(2-2-2. Leg-shaped support part)
Fig. 7 shows the radiographic image capturing apparatus 100 without the cover 2, as viewed from the rear surface 110b of the radiographic image capturing apparatus 100. In Fig. 7, the position of the grip portion 7 is indicated by a dashed line.
As shown in FIG. 2, the leg-like support portion 4b is provided so as to protrude from a surface 41b opposite to the support surface 41a of the planar support portion 4a until it abuts against the back surface portion 21.
As shown in FIG. 7, the leg support 4b includes a cylindrical first leg support 4b1 that is in contact with the inner circumferential surface of the grip 7. In the case where the housing 110 receives an impact from the side surface 110c, the position of the internal module 120 can be prevented from shifting. In addition, since the support member 4 can further disperse the load received by the housing 110 from the outside, the radiation The deflection of the detection unit 3 can be further suppressed.
The area surrounded by the first leg-like support portion 4b1 constitutes a recess 4c.
The leg-like support portion 4b includes a second leg-like support portion 4b2 that divides the recess 4c in half in the short direction, and a third leg-like support portion 4b3 that further divides the larger of the two recesses 4c in half in the long direction. , . As a result, the recess 4c is divided into three. An electric circuit 52 is housed in each of the divided recesses 4c.
The width, depth and length of the recess 4 c may be any size that is large enough to accommodate the electric circuit 52 .

(2-2-3. Supporting Members and Others)
The support member 4 has a planar support portion 4a and a leg support portion 4b which are integrally formed from a single foam body.
In this case, the recess 4c may be formed by cutting the area intended to be the recess 4c or by partial pressing, but it is preferable to form the recess 4c by partial pressing.
The portion of the support member 4 where the recess 4c is formed is thinner (has a smaller width in the direction perpendicular to the support surface 41a) than the other portion (the leg-like support portion 4b). However, when the recess 4c is formed by partial pressing, the foaming ratio of the surface of the recess 4c decreases and the strength increases. Therefore, the rigidity of the support member 4 at the recess 4c can be made equal to that of the leg-like support portion 4b.
The support member 4 may also be produced by laminating a plurality of foam sheets.

[2-3. Electrical parts]
The electrical component 5 includes a connector 51 shown in FIG. 1, an electrical circuit 52 shown in FIG. 2, wiring 53, and a thermal diffusion sheet (not shown).

The connector 51 can be connected to an external connector for supplying power from an external device via a wired connection and for communicating with an external device. The connector 51 is also connected to an electric circuit 52 via wiring (not shown) and outputs power and communication signals from the outside to the electric circuit 52.
The electric circuit 52 is attached to the support member 4 by a mounting member, adhesive, or adhesive tape. When attached by adhesive or adhesive tape, the terminals may be connected by wiring using, for example, conductive tape.
That is, the radiation detection unit 3, the support member 4 and the electric circuit 52 are fixed to each other to form an internal module 120.

(2-3-1. Electrical Circuit)
The electric circuit 52 is disposed on the opposite surface 41 b of the support member 4 .
The electric circuit 52 is housed in the recess 4c of the support member 4 (between the leg-like support portions 4b).
The electric circuit 52 is spaced apart from the rear surface 21 of the housing 110. This makes it possible to prevent the load received by the housing 110 from the outside from being transmitted to the electric circuit 52.

The electric circuit 52 includes a scanning circuit, a readout circuit, a wireless communication circuit, a control circuit, a power supply circuit, a battery, and the like.
The scanning circuit is a circuit that controls each switch element.
The readout circuit is a circuit that reads out the electric charge as a signal value.
The wireless communication circuit is a circuit for wirelessly communicating with other devices.
The control circuit is a circuit that controls each circuit to generate image data.
The power supply circuit is a circuit for applying a voltage to a semiconductor element and supplying power to the above-mentioned circuits.

(2-3-2. Wiring)
The wiring 53 is formed of, for example, a flexible printed circuit board (Flexible Printed Circuits), and connects the photoelectric conversion unit 312 and the various electric circuits 52 .
Specifically, terminals of each scanning line (switch element) of the photoelectric conversion unit 312 are connected to a scanning circuit, terminals of each signal line (semiconductor element 312b) are connected to a readout circuit, and terminals of each bias line are connected to a power supply circuit.

(2-3-3. Thermal diffusion sheet)
The thermal diffusion sheet is provided at a position facing those elements that constitute the electric circuit 52 and that generate heat when the electric circuit 52 is in operation.
The positions facing the elements include, for example, the rear surface of the electric circuit 52, the support member 4, the housing 110, and the like.
In this way, the heat generated by the elements can be diffused by the thermal diffusion sheet, thereby preventing the elements from becoming excessively hot and causing a decrease in their functionality.
Moreover, it is possible to prevent the occurrence of heat spots in the area facing the element.
The thermal diffusion sheet may be disposed opposite the element via a heat transfer member.

<Modification 1>
Next, a first modified example of the present invention will be described. In the first modified example, the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

In the above embodiment, the internal module 120 is fixed to the inner surface of the front part 11 by the fixing layer 6 as shown in FIG. 2. However, the fixing layer 6 may be removable because the internal module 120 may be removed for repair due to defects during production or use of the radiographic imaging device 100. Specifically, the removable adhesive layer 61 may be a weak adhesive tape, a weak adhesive adhesive, or a hot melt that can be peeled off by heating. In addition, materials such as TESA's 704 series, which peels off the tape itself when stretched, or Inoac's PureCell, which has air bubbles that act like suction cups and can be fixed like a weak adhesive tape, may be used.

However, when removing the internal module 120 from the front surface portion 11, the gap between the internal module 120 and the front surface portion 11 is narrow and it is difficult to insert a finger therein, making removal difficult. For this reason, it is preferable to provide a protrusion 6a shown in FIG. 8 on the fixing layer 6 provided between the radiation detection unit 3 and the front surface portion 11.
Fig. 8 shows an upside-down cross-sectional view of the radiation image capturing device 100 shown in Fig. 1 taken along line II-II with the internal module 120 removed from the front surface 11. Note that the leg-like support 4b and the electrical components 5 are omitted in Fig. 8.
By providing the protrusion 6 a on the fixing layer 6 , the internal module 120 can be lifted up by holding the protrusion 6 a, making it easier to remove the internal module 120 from the front surface portion 11 .
The protruding portion 6a may be a part of the adhesive tape or the like that constitutes the adhesive layer 61, or a thin, tensile-resistant piece of resin film may be provided on the fixing layer 6 to form the protruding portion 6a.

<Modification 2>
Next, a description will be given of Modification 2 of the present invention. In Modification 2, the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

9 is a diagram showing the rear surface 110b of the radiographic imaging device 100 according to the second modification. As shown in FIG. 9, the rear surface 110b of the housing 110 has unconnected concave gripping portions 7A provided along each side in the peripheral region of the rear surface 110b. The gripping portions 7A provided along each side of the rear surface 110b allow the radiographic imaging device 100 to be held in various orientations. In addition, when the radiographic imaging device 100 is inserted under a subject to capture an image, even if the radiographic imaging device 100 is not visible when the radiographic imaging device 100 is pulled out after capture, the user can easily hold the gripping portion 7, which increases the user's freedom and reduces the load of capturing an image.
The position and shape of the gripping portion 7A are similar to those of the gripping portion 7 in the above embodiment, except that the gripping portion 7A is not circumferential.

<Modification 3>
Next, a description will be given of Modification 3 of the present invention. In Modification 3, the same components as those in the above embodiment and Modification 2 are denoted by the same reference numerals, and the description thereof will be omitted.

10A and 10B show an example of a radiographic imaging device 100 for one-shot long-length imaging, which is a method for imaging a relatively wide range such as the upper body or lower body of a patient. In one-shot long-length imaging, a plurality of radiographic imaging devices 100 are arranged side by side in the direction of the body axis of a subject so as to overlap each other.
Fig. 10A is an example of a view of the radiographic image capturing device 100 according to Modification 3 when capturing one long shot image, as viewed from the side 110c. In the example shown in Fig. 10A, three radiographic image capturing devices 100 are arranged in a row in the holder 200 so as to form an overlapping area a.
Fig. 10B is an example of a view of the radiographic imaging device 100 according to Modification Example 3 when capturing one long shot image from the rear surface 110b. In the example shown in Fig. 10B, the rear surface 110b of the radiographic imaging device 100 is provided with a gripping portion 7A and a gripping portion 7B extending to the vicinity of a corner of the housing 110 along a side of the rear surface 110b that does not have an overlapping area a with another radiographic imaging device 100.
By doing this, when inserting or removing the radiographic imaging device 100 into or from the holder 200, even if the position at which the radiographic imaging device 100 is installed is high or low, it is easy to grasp the gripping portion 7B and to easily insert or remove the radiographic imaging device 100.
The position and shape of the grip portion 7B are the same as those of the grip portion 7 in the above embodiment, except that it is not circumferential and extends along the edge of the back surface 110b that does not have an overlapping area a with other radiological imaging devices 100, to near the corner of the housing 110.

<Modification 4>
Next, a description will be given of Modification 4 of the present invention. In Modification 4, the same components as those in the above embodiment and Modification 2 are denoted by the same reference numerals, and the description thereof will be omitted.

11A and 11B show an example in which the radiation image capturing device 100 is mounted on a medical cart 300. FIG.
FIG. 11A is a view showing the state in which the radiographic imaging device 100 is inserted inside the medical examination cart 300, as viewed from the side 110c.
11A , the radiographic imaging device 100 is installed in a bin 320 inside the medical cart 300. The medical cart 300 also has a connector 310 that is connected to a connector 51 and is used to supply power to the radiographic imaging device 100 and to communicate with the radiographic imaging device 100.
Further, on the rear surface 110b of the radiographic image capturing device 100, there are provided a grip portion 7A and a grip portion 7C extending to the vicinity of a corner of the housing 110 along the side opposite to the side on which the connector 51 is provided.
Fig. 11B is a view of the radiographic imaging device 100 as viewed from the rear surface 110b side. As shown in Fig. 11B, when removing the radiographic imaging device 100 from the medical cart 300, the radiographic imaging device 100 can be removed by gripping the gripping portion 7C and pulling it in the direction opposite to the side where the connector 51 is provided.
By providing a gripping portion 7C on the back surface 110b of the radiographic imaging device 100, which extends along the opposite side to the side on which the connector 51 is provided, to near the corner of the housing 110, the radiographic imaging device 100 can be easily removed from the medical cart 300.
The position and shape of grip portion 7C are the same as those of grip portion 7 in the above embodiment, except that it is not circumferential and extends along the side opposite to the side on which connector 51 is provided, to near the corner of housing 110.

As described above, the radiographic imaging device 100 of this embodiment has a radiation detector (internal module 120) having a converter (sensor panel 31) that converts radiation into an electrical signal and a support body (support member 4) that supports the converter, and a housing 110 that is rectangular in a plan view and contains the radiation detector, the radiation detector being fixed to the inner surface of the housing 110, and the back surface 110b, which is the surface of the housing 110 opposite the surface into which radiation is incident, is provided with concave gripping portions 7, 7A, 7B, and 7C at least along each side of the back surface 110b of the housing 110.
Therefore, it is possible to provide a radiographic imaging device that is not easily damaged even when subjected to an external impact and is easy to hold from any direction.
Furthermore, since the internal module 120 is fixed to the inner surface of the housing 110, there is no need to provide a cushioning material between the internal module 120 and the side of the housing 110, so the position and shape of the gripping portions 7, 7A, 7B, 7C can be designed relatively freely.

In the radiographic imaging device 100 of the present embodiment, the grip portion 7 is provided circumferentially along each side of the rear surface 110 b of the housing 110 .
Therefore, it is possible to provide a radiographic imaging device that is easy to hold from any direction.

In addition, in the radiographic image capturing device 100 of this embodiment, the depth of the gripping portions 7, 7A, 7B, and 7C is equal to or greater than 4 mm and less than 8 mm.
Therefore, it is possible to provide a radiographic imaging device that can be easily held even when used in a vinyl bag or the like for preventing infection.

In addition, in the radiographic imaging device 100 of this embodiment, the shortest distance from the start ends of the gripping portions 7, 7A, 7B, and 7C to the end of the housing 110 is within 25 mm.
Therefore, when inserting the radiation image capturing device 100 under a subject to capture an image, there is no need to insert a hand deeply when removing the radiation image capturing device 100 after capturing an image, and the device can be easily removed.

Furthermore, in the radiographic imaging device 100 of this embodiment, the gripping portions 7, 7A, 7B, and 7C are arranged so that the inner surfaces of the gripping portions 7, 7A, 7B, and 7C are in contact with the support body (support member 4) in a direction perpendicular to the surface of the housing 110 on which radiation is incident (radiation incident surface 110a).
Therefore, even if the housing 110 receives an impact from the side surface 110c, the internal module 120 can be prevented from shifting in position.

Furthermore, in the radiation image capturing device 100 of this embodiment, the converter (sensor panel 31) has flexibility.
Therefore, even if the radiation image capturing device 100 receives an impact, the converter (sensor panel 31) is unlikely to be damaged.

In the radiographic image capturing device 100 of the present embodiment, at least the grip portion of the housing 110 is formed from carbon fiber reinforced resin containing short fibers.
Therefore, when the gripping portions 7, 7A, 7B, and 7C are molded, the material of the housing 110 stretches well, making it easy to mold the gripping portions 7, 7A, 7B, and 7C.

In the radiographic image capturing apparatus 100 of the present embodiment, the support body (support member 4) is made of a foam.
Therefore, the internal module 120 can be made lighter than when it is made of metal or non-foamed resin, and the load on the fixing layer 6 can be reduced even if the radiographic imaging device 100 receives an impact from the outside.

Furthermore, in the radiation image capturing device 100 of this embodiment, the radiation detector (internal module 120 ) is removable from the housing 110 .
Therefore, if a malfunction occurs during production or use of the radiographic imaging device 100, the radiation detector (internal module 120) can be removed and repaired, and the repaired radiation detector can be reinstalled.

Furthermore, in the radiological imaging device 100 of this embodiment, the gripping portion 7B is provided extending near a corner of the housing 110 along an edge of the housing 110 that does not overlap with other radiological imaging devices when multiple radiological imaging devices are arranged so as to overlap each other for long-length imaging.
Therefore, when taking one-shot long-length photographs, when taking the radiographic imaging device 100 in and out of the holder 200, even if the position at which the radiographic imaging device 100 is installed is high or low, it is easy to grasp the holding portion 7B and easy to take the radiographic imaging device 100 in and out.

In addition, in the radiographic imaging device 100 of this embodiment, a connector 51 for supplying power from an external source or communicating with the outside is provided on the side 110c of the housing 110, and the gripping portion 7C is provided extending along the opposite side to the side on which the connector 51 is provided, to near the corner of the housing 110.
Therefore, the radiation image capturing device 100 can be easily removed from the medical cart 300.

The present invention is not limited to the above-described embodiment and modified examples, and various modifications are possible. For example, as shown in FIG. 7, the present invention is not limited to the above-described embodiment and modified examples, in which the first cylindrical leg support 4b1 is provided within the circumference of the grip portion 7 and abuts against the inner peripheral surface of the grip portion 7. Furthermore, a cylindrical leg support may be provided outside the circumference of the grip portion 7 and abuts against the outer peripheral surface of the grip portion 7.

In the above embodiment and modified examples, the planar support portion 4a and the leg-like support portion 4b of the support member 4 are integrally molded from a single foam, but this is not limited to the above. The planar support portion 4a and the leg-like support portion 4b may be formed using foams of different materials, or the planar support portion 4a and the leg-like support portion 4b may be molded separately, and the molded planar support portion 4a and the leg-like support portion 4b may be bonded together.

In addition, in the above embodiment and modified example, the recess 4c is divided into three by the second leg-like support portion 4b2 and the third leg-like support portion 4b3, but this is not limited to the above. The recess 4c may be divided by multiple leg-like support portions 4b according to the number of electric circuits 52.

In addition, the specific configuration, operation contents, and procedures shown in the above embodiment may be modified as appropriate without departing from the spirit of the present invention.

100 Radiation image capturing device 110 Housing 110a Radiation incidence surface (front surface)
110b Rear surface 110c Side surface 1 Box 11 Front section 12 Side surface 2 Lid 21 Back section 120 Internal module (radiation detector)
3 Radiation detection unit 31 Sensor panel (converter)
311 Wavelength conversion unit 312 Photoelectric conversion unit
312a Substrate
312b Semiconductor element
312c Scanning Line
312d Signal line
312e Switch element
312f Bias wire
312g imaging surface 32 radiation shielding layer 33 electromagnetic field shielding layer 4 support member (support)
Reference Signs List 4a Planar support portion 4b Leg-shaped support portion 4c Recessed portion 41a Support surface 5 Electrical component 51 Connector 52 Electric circuit 53 Wiring 6 Fixing layer 61 Adhesive layer 62 Cushioning material 6a Protrusion 7, 7A, 7B, 7C Grip portion 200 Holder 300 Medical cart 310 Connector 320 Bottle

Claims (10)

a radiation detector having a converter for converting radiation into an electrical signal and a support for supporting the converter;
a housing that is rectangular in plan view and that houses the radiation detector;
The radiation detector is fixed to an inner surface of the housing on which radiation is incident ,
a rear surface of the housing opposite to a surface into which radiation is incident has a concave grip portion provided at least along each side of the rear surface of the housing ;
The gripping portion is provided such that an inner surface of the gripping portion and the support body are in contact with each other in a direction parallel to a surface of the housing on which radiation is incident . The radiographic imaging device according to claim 1, wherein the gripping portion is provided circumferentially along each side of the rear surface of the housing. The radiographic imaging device according to claim 1 or 2, wherein the depth of the gripping portion is 4 mm or more and less than 8 mm. The radiographic imaging device according to any one of claims 1 to 3, wherein the shortest distance from the start of the gripping portion to the end of the housing is within 25 mm. The radiographic imaging device according to claim 1 , wherein the converter is flexible. The radiographic imaging device according to claim 1 , wherein at least a grip portion of the housing is formed of a carbon fiber reinforced resin containing short fibers. The radiographic imaging device according to claim 1 , wherein the support is made of a foam. The radiographic imaging device according to claim 1 , wherein the radiation detector is removable from the housing. 9. The radiographic imaging device according to claim 1, wherein the gripping portion is provided extending to near a corner of the housing along a side of the housing that does not overlap with other radiographic imaging devices when multiple radiographic imaging devices are arranged so as to overlap each other for long-length imaging. A connector for supplying power from an external source or for communicating with an external source is provided on a side surface of the housing,
The radiographic imaging device according to claim 1 , wherein the grip portion is provided so as to extend to a vicinity of a corner of the housing along a side opposite to the side on which the connector is provided.

Images