JP7635450B2 - Radiation imaging system and radiation imaging apparatus - Google Patents

Description

The present invention relates to a radiation imaging system and a radiation imaging apparatus.

2. Description of the Related Art Radiography apparatuses that obtain radiation images by detecting the intensity distribution of radiation that has passed through an object are widely used in industrial non-destructive testing and medical diagnosis.
Japanese Patent Laid-Open No. 2003-233693 discloses a radiography apparatus that obtains the power required for a radiation sensor panel and an electric board, and receives power wirelessly to achieve waterproofing and prevention of electric leakage.
Patent Document 2 discloses a wireless power supply receiver-transmitter that performs wireless charging as well as wireless data transfer.

JP 2015-166691 A JP 2014-068471 A

It is expected that the radiation imaging device will be subjected to impact forces and external forces when taking images. Therefore, in order to improve the strength, the housing of the radiation imaging device may be made of metal alloys such as aluminum and magnesium, CFRP, etc. Metal alloys and CFRP are conductive, so they block electromagnetic waves used for wireless data transfer and charging, reducing the transfer efficiency. Therefore, when performing wireless data transfer and charging, it is necessary to provide a window part made of a non-conductive material in part of the housing. In addition, since metal alloys and CFRP are not optically transparent, it is necessary to provide a window part made of an optically transparent material in part of the housing when arranging an indicator using a light source such as an LED. If many such windows are arranged, multiple holes will be provided in the housing, resulting in many discontinuous strength surfaces, which may reduce the strength of the radiation imaging device.

The present invention was made in consideration of the above-mentioned problems, and aims to prevent a decrease in the strength of a radiographic device.

The present invention includes a radiation source that irradiates radiation, a radiation detection sensor that detects radiation, a first wireless communication unit, a wireless power receiving unit, and a housing that houses the radiation detection sensor, the first wireless communication unit, and the wireless power receiving unit , the housing having a non-opening made of a conductive material and an opening in which the conductive material is not provided, a second wireless communication unit that wirelessly communicates with the first wireless communication unit through the opening, and a wireless power supply unit that wirelessly supplies power to the wireless power receiving unit through the opening , and the first wireless communication unit is arranged in a position that does not overlap with the wireless power receiving unit when viewed from the opening side .

The present invention makes it possible to suppress a decrease in the strength of a radiography device.

1 is an external view illustrating an example of a radiation imaging apparatus according to a first embodiment. FIG. 1 is a cross-sectional view showing an example of a radiation imaging apparatus. FIG. 11 is an external view showing an example of a radiation imaging apparatus which is a modified example of the first embodiment. FIG. 11 is a cross-sectional view showing an example of a modified radiation imaging apparatus. FIG. 11 is a cross-sectional view illustrating an example of a radiation imaging apparatus according to a second embodiment. FIG. 13 is an external view illustrating an example of a radiation imaging apparatus according to a third embodiment. FIG. 1 is a cross-sectional view showing an example of a radiation imaging apparatus. FIG. 1 is a cross-sectional view illustrating an example of a radiation imaging system.

Embodiments of the present invention will be described in detail with reference to the attached drawings. However, the dimensions and structural details shown in each embodiment are not limited to those shown in the text and drawings. Furthermore, radiation described below is not limited to X-rays, but also includes alpha rays, beta rays, gamma rays, particle rays, cosmic rays, etc.

First Embodiment
A radiation imaging apparatus 100 according to the first embodiment will be described with reference to FIGS. 1 to 4. FIG.
Fig. 1(a) is an external view showing an example of a radiographic imaging apparatus 100 as viewed from the direction of incidence of radiation. Fig. 1(b) is an external view showing an example of a radiographic imaging apparatus 100 as viewed from the opposite side of Fig. 1(a). Fig. 2(a) is a cross-sectional view of a cross section cut along line II in Fig. 1(a) as viewed from the direction of the arrow. Fig. 2(b) is an external view of a wireless power receiving unit 8 and an LED 9 as viewed from the direction of an arrow Ar1 in Fig. 2(a). Fig. 2(c) is an enlarged view of the periphery of the LED 9 in Fig. 2(a).

The radiation imaging apparatus 100 obtains a radiation image corresponding to radiation that is irradiated by a radiation generating device (not shown) and transmitted through a subject. The radiation imaging apparatus 100 transfers the obtained radiation image data to an external device, displays the data on an external display device, etc.
The radiation imaging apparatus 100 includes a radiation detection panel 1, a control board 2, a secondary battery 4, a support base 5, a cushioning material 6, a housing 7, a wireless power receiving unit 8, an LED 9, an antenna 10, and the like.

The radiation detection panel 1 converts incident radiation into an image signal. The side of the radiation detection panel 1 where radiation is incident is the detection surface. The radiation detection panel 1 has a sensor substrate 1a on which multiple photoelectric conversion elements are arranged two-dimensionally on a glass substrate, a phosphor layer 1b arranged on the sensor substrate 1a, and a phosphor protective film 1c arranged on the phosphor layer 1b. The multiple photoelectric conversion elements arranged on the sensor substrate 1a are MIS-type and PIN-type conversion elements capable of detecting visible light. The phosphor protective film 1c protects the phosphor layer 1b. A material with relatively high moisture resistance is used for the phosphor protective film 1c.

The radiation detection panel 1 has an effective imaging area capable of imaging incident radiation as a radiographic image. Further, the radiation detection panel 1 has an effective imaging area that is the entire area on a plane on which a plurality of photoelectric conversion elements are arranged, or a part of the area, as viewed from the direction in which radiation is incident.
With the above-described configuration, in the radiation detection panel 1, the phosphor layer 1b emits light in response to incident radiation, and the photoelectric conversion elements arranged on the sensor substrate 1a convert the emitted light into an electrical signal. However, the radiation detection panel 1 may use direct conversion type conversion elements that directly convert radiation into an electrical signal, instead of the phosphor layer 1b and the photoelectric conversion elements.
In addition, the radiation detection panel 1 is electrically connected to a control board 2 via a flexible circuit board 3 .

The control board 2 reads out and processes the electrical signals converted by the radiation detection panel 1. The control board 2 obtains radiation image data by converting the electrical signals into digital signals. The control board 2 corresponds to an example of a control unit.
The secondary battery 4 supplies power used for the operation of the radiation detection panel 1 and the control board 2. The secondary battery 4 functions as a battery. For example, a lithium ion battery, an electric double layer capacitor, an all-solid-state battery, or the like is used as the secondary battery 4.

The support base 5 supports the components of the radiation imaging apparatus 100 within the housing 7. The support base 5 has a board support portion 51 and legs 52. The board support portion 51 is formed, for example, in a flat plate shape, and supports the radiation detection panel 1 on the radiation incident surface side. The board support portion 51 also supports the control board 2, secondary battery 4, etc. on the surface opposite to the surface supporting the radiation detection panel 1. The legs 52 extend from the surface opposite to the surface supporting the radiation detection panel 1, and are joined to the housing 7.
The cushioning material 6 protects the radiation detection panel 1 from external forces. The cushioning material 6 is disposed between the detection surface of the radiation detection panel 1 and the housing 7.

The housing 7 accommodates the components of the radiation imaging apparatus 100 .
The housing 7 is a substantially rectangular parallelepiped, and has a substantially rectangular shape having long and short sides when viewed from the direction of incidence of radiation. The housing 7 has an incident portion 71 where radiation is incident, a bottom portion 72 located on the opposite side of the incident portion 71 with the radiation detection panel 1 in between, and a plurality of (e.g., four) side portions 73 connecting the incident portion 71 and the bottom portion 72. The housing 7 can be formed, for example, by integrating the bottom portion 72 and the side portions 73 and joining the separate incident portion 71.

Radiation is incident on the incident portion 71. The incident portion 71 has a substantially flat, plate-like surface (outer surface) exposed to the outside. Since the incident portion 71 allows radiation to be incident thereon, it is preferable that the radiation transmittance is relatively high. Furthermore, it is preferable that the incident portion 71 is light in weight and can ensure a certain level of strength against impact. The incident portion 71 is made of, for example, a resin material or CFRP (carbon fiber reinforced plastic).
An index 711 is marked on the surface of the incident part 71 to indicate the center of the effective imaging area and the range of the effective imaging area. The index 711 is formed by painting or printing. A user can easily recognize the center of the effective imaging area and the effective imaging area by visually checking the index 711. Note that the index 711 only needs to enable the user to recognize the center of the effective imaging area and the range of the effective imaging area, and may be, for example, a step recessed in the direction of the radiation detection panel 1.

The bottom 72 covers the components of the radiation imaging apparatus 100 from the opposite side to the incident part 71. The bottom 72 has a substantially plate-like shape with a substantially flat surface (outer surface) exposed to the outside. The bottom 72 is substantially parallel to the incident part 71.
The side portion 73 covers the components of the radiation imaging apparatus 100 from the sides. The side portion 73 has a substantially flat plate-like surface (outer surface) exposed to the outside. The side portion 73 is substantially perpendicular to the entrance portion 71 and the bottom portion 72.
The bottom 72 and the side 73 preferably have strength against drops and impacts, are lightweight to reduce the burden during transportation, and are easy to operate. The bottom 72 and the side 73 are made of, for example, a metal alloy such as magnesium or aluminum, CFRP, fiber reinforced resin, etc. Note that the bottom 72 and the side 73 may be made of a material with a relatively high magnetic permeability such as SUS430 in order to effectively reduce noise received from the outside of the housing 7.

The wireless power receiving unit 8 receives power transmitted wirelessly to charge the secondary battery 4. In other words, by appropriately charging the secondary battery 4 and maintaining a sufficient amount of power during imaging, the user can perform radiography smoothly. The wireless power receiving unit 8 has power reception controlled by the control board 2.
The LED 9 functions as an indicator that indicates the state of the radiation imaging apparatus 100. For example, the LED 9 emits light to indicate to a user the activated state or the operating state of the radiation imaging apparatus 100. The LED 9 is also an example of a light source.
The antenna 10 wirelessly transmits and receives data to and from an external device. The transmission and reception of data between the antenna 10 and the external device is controlled by the control board 2. The antenna 10 is an example of a wireless transmission/reception unit or a wireless data transmission unit.

Here, if the housing 7 is made of a conductive material, the efficiency of power reception by the wireless power receiving unit 8 and the efficiency of data transfer by the antenna 10 will decrease. Also, if the housing 7 is made of a material that is not optically transparent, the user will not be able to recognize the light of the LED 9. Therefore, it is possible to improve the efficiency of transmitting data, power, and light by providing a window in the housing 7. On the other hand, since the window requires a hole to be provided in a part of the housing 7, the structure of the radiation imaging device 100 becomes discontinuous, and stress concentration is likely to occur near the window. Also, the rigidity of the housing 7 itself will decrease, and the strength of the radiation imaging device 100 will decrease. Since it is expected that the radiation imaging device 100 will be subjected to impact forces and external forces when imaging, etc., it is required to have sufficient strength to prevent damage.

The housing 7 of the present embodiment has a structure that suppresses a decrease in strength due to the window portion.
As shown in FIG. 1 and FIG. 2, the housing 7 has two windows 11A and 11B. The windows 11A and 11B are disposed close to one of the four corners of the rectangular housing 7. Specifically, the window 11A is disposed at the bottom 72, and the window 11B is disposed at the side 73 on the short side. The window 11A and the window 11B are disposed at the same position in the direction along the short side of the housing 7, or at positions overlapping in the direction along the short side of the housing 7. The window 11A is continuous with the bottom 72 and is substantially plate-shaped substantially parallel to the bottom 72. The window 11B is continuous with the side 73 and is substantially plate-shaped substantially parallel to the side 73.

As shown in Fig. 2(a) and (c), the wireless power receiving unit 8, the LED 9, and the antenna 10 are arranged inside the window 11A. When viewed from the direction of the arrow Ar1 shown in Fig. 2(a), the wireless power receiving unit 8, the LED 9, and the antenna 10 are arranged so as to overlap with the window 11A. That is, when viewed from a direction perpendicular to the outer surface of the window 11A, the wireless power receiving unit 8, the LED 9, and the antenna 10 are arranged so as to overlap with the window 11A. Specifically, the wireless power receiving unit 8 and the LED 9 are arranged along the inner surface of the window 11A, and the antenna 10 is arranged at a position away from the inner surface of the window 11A. Therefore, the window 11A functions as a window for receiving power by the wireless power receiving unit 8, a window for transmitting light from the LED 9, and a window for transferring data by the antenna 10. In particular, since the wireless power receiving unit 8 and the LED 9 are disposed in contact with the inner surface of the window 11A, the window 11A mainly functions as a window for the wireless power receiving unit 8 and the LED 9.
On the other hand, the antenna 10 is disposed inside the window portion 11B. When viewed from the direction of the arrow Ar2 shown in FIG. 2(a), the antenna 10 is disposed overlapping the window portion 11B. That is, when viewed from a direction perpendicular to the outer surface of the window portion 11B, the antenna 10 is disposed overlapping the window portion 11B. Specifically, the antenna 10 is disposed at a position away from the inner surface of the window portion 11B. Therefore, the window portion 11B functions as a window portion for transferring data by the antenna 10.

Here, the wireless power receiving unit 8 and the LED 9 are configured to overlap each other. Specifically, the LED 9 is disposed so as to be located between the wireless power receiving unit 8 and the inner surface of the window portion 11A.
FIG. 2B is a diagram showing the configuration of the wireless power receiving unit 8 and the LED 9 as viewed from the direction of the arrow Ar1 in FIG. 2A. As shown in FIG. 2B, the LED 9 is located approximately at the center of the wireless power receiving unit 8. The wireless power receiving unit 8 is larger than the substrate 91 on which the LED 9 is mounted, and is arranged inside the window 11A so as to cover the substrate 91 from the inside of the housing 7. By configuring the wireless power receiving unit 8 and the LED 9 in this manner, the window of the wireless power receiving unit 8 and the LED 9 can be shared by one window 11A, and the size of the window 11A can be reduced. Therefore, the strength of the housing 7 can be prevented from decreasing. In addition, by arranging the wireless power receiving unit 8 and the LED 9 as described above, it is possible to save space compared to the case where they are arranged separately, and the radiographic imaging device 100 can be made smaller.

Furthermore, the antenna 10 is supported by the surface of the board support portion 51 opposite to the surface supporting the radiation detection panel 1. As shown in Fig. 2(a) , when viewed from the direction of the arrow Ar1, the antenna 10 is disposed in a position where it does not overlap with the wireless power receiving portion 8 and the LED 9. Furthermore, the antenna 10 is disposed inside each of the windows 11A and 11B. Therefore, data is transferred through the two windows 11A and 11B, so that the radiation range of the antenna 10 can be expanded.
In addition, if the radiation characteristics of the antenna 10 can be sufficiently obtained with only the window 11A, the housing 7 does not need to have the window 11B. In this case, the single window 11A can be used as a common window for the wireless power receiving unit 8, the LED 9, and the antenna 10. Therefore, the strength of the housing 7 can be further prevented from decreasing.

Here, at least a portion of the window portion 11A is made of a light-transmitting material so that a user can visually recognize the light from the LED 9. For example, the window portion 11A is made of resin, fiber-reinforced resin, or the like, and all or a portion of the window portion 11A is made to be a light-transmitting portion.
When a part of the window portion 11A is to be a light-transmitting portion, it can be configured by integrally molding a light-transmitting material and a light-non-transmitting material by heterogeneous material molding, etc. Alternatively, the light-transmitting material and the light-non-transmitting material may be molded separately and then joined together by adhesive, industrial tape, ultrasonic welding, or the like.

In addition, if the entire window portion 11A is made of a light-transmitting material, it is possible to prevent light from passing through in locations where it is not desired or to adjust the amount of light that passes through by painting, printing, or placing a light-blocking sheet on the outer or inner surface of the window portion 11A.
On the other hand, the window portion 11B does not function as a window portion for the LED 9. Therefore, the window portion 11B does not need to be made of a light-transmitting material, and it is sufficient that at least a part of the window portion 11B is made of a non-conductive material.
The window portions 11A and 11B are set to a suitable thickness so that the efficiency of power and data transfer is not significantly reduced. The window portion 11A is set to a suitable thickness so as to transmit the light of the LED 9.

To provide the windows 11A and 11B in the housing 7, the windows 11A and 11B are joined to the housing 7 with adhesive, industrial tape, or the like, or fastened with screws, or the like. At this time, waterproofing can be improved by interposing waterproof packing between the windows 11A and 11B and the housing 7, or by attaching them with waterproof double-sided tape, or the like. The housing 7 may also be formed by integrally molding the windows 11A and 11B into the housing 7 using outsert molding or heterogeneous material molding. By integrally molding the windows 11A and 11B, the interface strength between the housing 7 and the windows 11A and 11B is improved, and the strength of the radiation imaging device 100 can be improved.

In this way, by arranging the wireless power receiving unit 8 and the LED 9 so as to contact the inner surface of one window 11A, the window of the wireless power receiving unit 8 and the window of the LED 9 can be made common, and the number of windows provided in the housing 7 can be reduced. In addition, by arranging the wireless power receiving unit 8, the LED 9, and the antenna 10 inside one window 11A, the window of the wireless power receiving unit 8, the window of the LED 9, and the window of the antenna 10 can be made common, and the number of windows provided in the housing 7 can be reduced. Therefore, it is possible to suppress a decrease in the strength of the housing 7. In addition, by arranging the wireless power receiving unit 8 so as to overlap the window 11A when viewed from a direction perpendicular to the outer surface of the window 11A, it is possible to improve the efficiency when the wireless power receiving unit 8 receives power. Similarly, by arranging the LED 9 so as to overlap the window 11A, it is possible to improve the visibility of the LED 9. Similarly, by arranging the antenna 10 so that it overlaps the window portion 11A, the efficiency of data transfer by the antenna 10 can be improved.

In this embodiment, the wireless power receiving unit 8, the LED 9, and the antenna 10 are arranged in one window 11A, but this is not limited to the above, and either the LED 9 or the antenna 10 and the wireless power receiving unit 8 may be arranged.

Next, a radiography device 110 as a modified example of the first embodiment will be described with reference to Figures 3 and 4. The radiography device 100 shown in Figures 1 and 2 has a window 11A in the bottom 72 and a window 11B in the side 73, but the radiography device 110 shown in Figures 3 and 4 has a window 11C in the inclined portion 74. The same components as those in Figures 1 and 2 are given the same reference numerals.

Fig. 3(a) is an external view showing an example of the radiation imaging device 110 as viewed from the radiation incidence direction. Fig. 3(b) is an external view showing an example of the radiation imaging device 110 as viewed from the opposite side of Fig. 3(a). Fig. 4(a) is a cross-sectional view of a cross section cut along line II-II in Fig. 3(a) as viewed from the direction of the arrow. Fig. 4(b) is an enlarged view of the periphery of the LED 9 in Fig. 4(a).
The housing 7 of the radiation imaging device 110 of this embodiment has an inclined portion 74 between a bottom portion 72 and a side portion 73. The inclined portion 74 functions as a connecting portion that continuously connects the bottom portion 72 and the side portion 73. Here, continuously connecting means that the bottom portion 72 or the side portion 73 is not interposed again between the bottom portion 72 and the side portion 73.
The inclined portion 74 is inclined with respect to the bottom portion 72 and the side portion 73. Moreover, the inclined portion 74 is formed continuously over substantially the entire circumference of the housing 7. Moreover, as shown in Fig. 4(a) , the inclined portion 74 has a substantially flat surface (outer surface) exposed to the outside, which is substantially plate-shaped.

The housing 7 of this embodiment has one window 11C. The window 11C is located on the short side of the rectangular housing 7, approximately in the center of the length in the direction along the short side. As shown in FIG. 4(a), the window 11C is formed across the bottom 72 and side 73 of the housing 7. Specifically, the window 11C has a substantially plate-shaped first portion 111C that is continuous with the inclined portion 74 and is substantially parallel to the inclined portion 74. The window 11C also has a substantially plate-shaped second portion 112C that is continuous with the bottom 72 and is substantially parallel to the bottom 72, and a substantially plate-shaped third portion 113C that is continuous with the side 73 and is substantially parallel to the side 73.

4(a) and (b), the wireless power receiving unit 8, the LED 9, and the antenna 10 are arranged inside the window 11C. When viewed from either the direction of the arrow Ar1 or the direction of the arrow Ar2 shown in FIG. 4(a), the wireless power receiving unit 8, the LED 9, and the antenna 10 are arranged to overlap with the window 11C. When viewed from a direction perpendicular to the outer surface of the first portion 111C, the wireless power receiving unit 8 and the LED 9 are arranged to overlap with the first portion 111C. When viewed from a direction perpendicular to the outer surface of the second portion 112C, the antenna 10 is arranged to overlap with the second portion 112C. Specifically, the wireless power receiving unit 8 and the LED 9 are arranged along the inner surface of the first portion 111C, and the antenna 10 is arranged along the inner surface of the second portion 112C. Therefore, the window 11C functions as a window for the wireless power receiving unit 8, a window for the LED 9, and a window for the antenna 10. As in FIG. 2, the wireless power receiving unit 8 and the LED 9 are configured to overlap each other.

In this way, by arranging the wireless power receiving unit 8, the LED 9, and the antenna 10 in one window 11C, the window for the wireless power receiving unit 8, the window for the LED 9, and the window for the antenna 10 can be made common, and the number of windows provided in the housing 7 can be reduced. This prevents the strength of the housing 7 from decreasing. In addition, since the window 11C is located across the bottom 72 and the side 73, the wireless power receiving unit 8 can receive power over a wider area than when the window 11C is formed only on the bottom 72 or the side 73, and the visibility of the LED 9 and the radiation characteristics of the antenna 10 can be improved.

In the present embodiment, the wireless power receiving unit 8 and the LED 9 are configured to overlap each other, but the present invention is not limited to this. For example, the wireless power receiving unit 8 and the antenna 10 may be configured to overlap each other, the LED 9 and the antenna 10 may be configured to overlap each other, or all of the wireless power receiving unit 8, the LED 9, and the antenna 10 may be configured to overlap each other. By configuring in this way, it is possible to save space and further reduce the sizes of the windows 11A, 11B, and 11C.
In the above-described modified example, the window portion 11C has the first portion 111C. However, this is not limited to this case, and the second portion 112C and the third portion 113C may be formed continuously without having the first portion 111C.

Here, if the wireless power receiving unit 8 and the antenna 10 are close to each other, their operations may interfere with each other, resulting in malfunction. Therefore, the following method of suppressing interference may be applied.
First, in the radiation imaging devices 100 and 110, the frequency band used when the wireless power receiving unit 8 wirelessly receives power is set to be different from the frequency band used when the antenna 10 wirelessly transfers data. In this way, by setting the frequency bands of the wireless power receiving unit 8 and the antenna 10 to be different from each other, interference with each other's operations can be suppressed.

Secondly, the control board 2 of the radiographic imaging device 100, 110 controls the wireless power receiving unit 8 and the antenna 10 so that they do not operate simultaneously, and prevents the period when power is received wirelessly from overlapping with the period when the antenna 10 transfers data. Specifically, the control board 2 controls the wireless power receiving unit 8 so that it does not receive power wirelessly during the period when data is being transferred to the outside by the antenna 10. On the other hand, the control board 2 controls the wireless power receiving unit 8 to receive power wirelessly only during the period when data is not being transferred by the antenna 10. In this way, by controlling the wireless power receiving unit 8 and the antenna 10 so that they do not operate simultaneously, it is possible to suppress interference with each other's operations. Therefore, stable data transfer is possible and the efficiency of wireless power reception can be improved.

Second Embodiment
A radiation imaging apparatus 120 according to the second embodiment will be described with reference to FIG.
Fig. 5A is a cross-sectional view showing an example of a radiation imaging apparatus 120. Fig. 5B is an enlarged view of the periphery of the LED 9 in Fig. 5A. Note that the same components as those in the first embodiment are denoted by the same reference numerals.

The radiation imaging device 120 has a light-shielding sheet 12 located between the LED 9 and the radiation detection panel 1. The light-shielding sheet 12 corresponds to an example of a light-shielding layer. The light-shielding sheet 12 is larger than the wireless power receiving unit 8, and is disposed inside the window portion 11A so as to cover the wireless power receiving unit 8 from the inside of the housing 7. Here, since the LED 9 is located between the wireless power receiving unit 8 and the inner surface of the window portion 11A, the light-shielding sheet 12 covers the LED 9 from the inside of the housing 7 via the wireless power receiving unit 8.

The light-shielding sheet 12 blocks light from the LEDs 9 so that it does not reach the radiation detection panel 1. As described above, in the radiation detection panel 1, the phosphor layer 1b emits light in response to incident radiation, and the photoelectric conversion elements on the sensor substrate 1a convert the emitted light into an electrical signal. Therefore, if the light from the LEDs 9 enters the radiation detection panel 1 from the periphery, it will have an unintended effect on the radiation image.
By disposing the light-shielding sheet 12 between the LEDs 9 and the radiation detection panel 1, it is possible to prevent the light from the LEDs 9 from reaching the radiation detection panel 1. In addition, since the light-shielding sheet 12 is disposed inside the window portion 11A, the region of the window portion 11A where the light-shielding sheet 12 is disposed does not allow light to pass through from the outside, thereby preventing light leakage.

The light-shielding sheet 12 may be a magnetic sheet having magnetism. By using a magnetic sheet, it is possible to change the direction of a part of the magnetic field generated when receiving power wirelessly to a magnetic field along the magnetic sheet, and it is possible to suppress the intrusion of the magnetic field into the radiation imaging device 100. Furthermore, if there is a metal material or the like inside the radiation imaging device 100, it is possible to suppress the influence of a repulsive magnetic field generated by the metal material that repels the magnetic field when receiving power wirelessly. Therefore, it is possible to improve the efficiency of wireless power reception. Furthermore, it is possible to suppress the influence of the magnetic field on the radiation detection panel 1 and the control board 2, and it is possible to reduce noise in the radiation image, etc.

Third Embodiment
A radiation imaging apparatus 130 according to the third embodiment will be described with reference to FIGS.
Fig. 6(a) is an external view showing an example of the radiation imaging device 130 as viewed from the radiation incidence direction. Fig. 6(b) is an external view showing an example of the radiation imaging device 130 as viewed from the opposite side of Fig. 6(a). Fig. 7(a) is a cross-sectional view of a cross section cut along line III-III in Fig. 6(a) as viewed from the direction of the arrow. Fig. 7(b) is an enlarged view of the periphery of the LED 9 in Fig. 7(a). Note that the same reference numerals are used to denote the same components as those in the first embodiment.

The housing 7 of the radiation imaging apparatus 130 of this embodiment has a first inclined portion 74 and a second inclined portion 75 .
The first inclined portion 74 is located between the bottom portion 72 and the side portion 73. The first inclined portion 74 functions as a connecting portion that continuously connects the bottom portion 72 and the side portion 73. The first inclined portion 74 is inclined with respect to the bottom portion 72 and the side portion 73. The first inclined portion 74 has a substantially flat plate-like surface (outer surface) exposed to the outside.
The second inclined portion 75 is located between the incident portion 71 and the side portion 73. The second inclined portion 75 functions as a connecting portion that continuously connects the incident portion 71 and the side portion 73. The second inclined portion 75 is inclined with respect to the incident portion 71 and the side portion 73. The second inclined portion 75 has a substantially flat plate-like surface (outer surface) exposed to the outside.
The first inclined portion 74 and the second inclined portion 75 are formed continuously over substantially the entire circumference of the housing 7 .

The housing 7 of this embodiment has one window 11D. The window 11D is located on the short side of the rectangular housing 7, approximately in the center of the length along the short side. Also, as shown in FIG. 7(a), the window 11D is formed across the entrance portion 71 and the bottom portion 72 of the housing 7. Specifically, the window 11D has a substantially plate-shaped first portion 111D that is continuous with the side portion 73 and is substantially parallel to the side portion 73. Also, the window 11D has a substantially plate-shaped second portion 112D that is continuous with the first inclined portion 74 and is substantially parallel to the first inclined portion 74, and a substantially plate-shaped third portion 113D that is continuous with the second inclined portion 75 and is substantially parallel to the second inclined portion 75. Furthermore, the window 11D has a support portion 114D.

As shown in FIG. 7A, the wireless power receiver 8, the LED 9, and the antenna 10 are arranged inside the window 11D. When viewed from either the direction of the arrow Ar1 or the direction of the arrow Ar2 shown in FIG. 7A, the wireless power receiver 8, the LED 9, and the antenna 10 are arranged to overlap with the window 11D. When viewed from a direction perpendicular to the outer surface of the first portion 111D, the wireless power receiver 8 and the LED 9 are arranged to overlap with the first portion 111D. When viewed from a direction perpendicular to the outer surface of the second portion 112D, the antenna 10 is arranged to overlap with the second portion 112D. Specifically, the wireless power receiver 8 and the LED 9 are arranged along the inner surface of the first portion 111D, and the antenna 10 is arranged along the inner surface of the second portion 112D.
Here, since the window portion 11D is located across the entrance portion 71 and the bottom portion 72, the window portion 11D can be viewed from various directions of the radiation imaging device 130. This improves the visibility of the LED 9 functioning as an indicator. In addition, the wireless power receiving unit 8 can receive power widely, and the radiation characteristics of the antenna 10 can be improved.

On the other hand, since the window portion 11D extends between the entrance portion 71 and the bottom portion 72, the window portion 11D becomes large, and there is a risk that the strength of the window portion 11D itself will decrease. In the window portion 11D of this embodiment, the support portion 114D is disposed between the inner surface of the second portion 112D and the inner surface of the third portion 113D. The support portion 114D is, for example, substantially columnar or plate-shaped. In this way, by having the support portion 114D, the rigidity of the window portion 11D can be improved, and a decrease in the strength of the window portion 11D can be suppressed.
Furthermore, the support portion 114D is disposed between the LEDs 9 and the radiation detection panel 1. Therefore, by configuring the support portion 114D to be substantially plate-shaped and have light-blocking properties, it is possible to block the light from the LEDs 9 from reaching the radiation detection panel 1.

Next, the radiation imaging system 140 will be described.
FIG. 8 is a cross-sectional view showing an example of the configuration of the radiation imaging system 140.
The radiation imaging system 140 includes a radiation imaging apparatus 130 and a wireless power transmitting unit 150. The radiation imaging apparatus 130 has the same configuration as that described above, and is denoted by the same reference numerals.
The wireless power transmitting unit 150 transmits power wirelessly to the wireless power receiving unit 8. The wireless power transmitting unit 150 has a wireless power transmitting unit 21, a control board 22, and a housing 23.

The wireless power transmitting unit 21 receives power from an external source and transmits power to the wireless power receiving unit 8. The control board 22 controls the wireless power transmitting unit 21. The housing 23 houses the components of the wireless power transmitting unit 150.
When wireless charging is performed, the wireless power transmitting unit 150 is disposed close to the window 11D of the housing 7 of the radiation imaging device 130 so that the wireless power transmitting unit 21 and the wireless power receiving unit 8 face each other. In this case, the window 11D of the radiation imaging device 130 is covered by the wireless power transmitting unit 150, and there is a risk that the user will not be able to see the light of the LED 9.

The housing 23 of the wireless power transmitting unit 150 of this embodiment has a light transmitting portion 24 in at least a portion that covers the window portion 11D of the housing 7 of the radiation imaging device 130. The light transmitting portion 24 is substantially plate-shaped and made of a light-transmitting material. Here, the light transmitting portion 24 has a first transmitting portion 241, a second transmitting portion 242, and a third transmitting portion 243. The wireless power transmitting unit 21 is disposed inside the first transmitting portion 241. The second transmitting portion 242 and the third transmitting portion 243 are each continuous with the first transmitting portion 241 and substantially perpendicular to the first transmitting portion 241.
Therefore, even if the wireless power transmission unit 150 is placed close to the window portion 11D of the housing 7 of the radiation imaging device 130 to perform wireless charging, the user can see the light of the LED 9 through the light-transmitting portion 24.

If the window portion 11D of the housing 7 is covered by the wireless power transmitting unit 150 when wireless charging is performed, the following method may be applied.
First, when the wireless power receiving unit 8 receives power wirelessly, the control board 2 of the radiation imaging device 130 controls the LED 9 not to emit light. In this manner, by not causing the LED 9 to emit light, it is possible to save power.
Secondly, the radiation imaging device 130 is configured to have a plurality of LEDs 9. When the wireless power receiving unit 8 receives power wirelessly, the control board 2 of the radiation imaging device 130 controls the LEDs 9 that are visible to the user to emit light, without emitting light from the LEDs 9 that are covered by the wireless power transmitting unit 150. By controlling the LEDs 9 in this way, the user can check the status of the radiation imaging device 130 and power saving can be achieved.

In this embodiment, the window portion 11D is described as being formed across the incident portion 71 and the bottom portion 72 of the housing 7, but this is not limited to this case, and the window portion 11D may be formed across the side portion 73 and the incident portion 71.
In addition, in this embodiment, a case has been described in which the second portion 112D is continuous with the first inclined portion 74 and is approximately parallel to the first inclined portion 74, but this is not limited to this case, and the second portion 112D may be continuous with the bottom portion 72 and approximately parallel to the bottom portion 72.
In addition, in this embodiment, a case has been described in which the third portion 113D is continuous with the second inclined portion 75 and is approximately parallel to the second inclined portion 75, but this is not limited to this case, and the third portion 113D may be continuous with the incident portion 71 and approximately parallel to the incident portion 71.

Although the present invention has been described in detail based on each embodiment, the present invention is not limited to the above-mentioned embodiment, and various forms within the scope of the gist of the present invention are also included in the scope of the present invention. Furthermore, each of the above-mentioned embodiments merely shows one embodiment of the present invention, and each embodiment and each modified example of each embodiment can be appropriately combined.
The wireless charging method described in this embodiment is not particularly limited, and an electromagnetic induction method, an electric field method, a resonance method, or the like can be appropriately selected and applied.
The wireless data transfer method described in this embodiment is not particularly limited, and standards and methods related to each wireless transfer, including short distance to long distance and transfer speed, can be appropriately selected and applied. Also, a transfer method using visible light or infrared light may be used.
In the present embodiment, the housing 7 is generally rectangular having long and short sides, but may be square.

1: Radiation detection panel 2: Control board 3: Flexible circuit board 4: Secondary battery 5: Support base 7: Housing 71: Incident part 72: Bottom part 3: Side part 74: Inclined part (first inclined part) 75: Inclined part (second inclined part) 8: Wireless power receiving part 9: LED 10: Antenna 11A-11D: Window part 12: Light shielding sheet 24: Light transmitting part 100, 110, 120, 130: Radiation imaging device 140: Radiation imaging system 150: Wireless power transmission unit

Claims (26)

A radiation source that emits radiation;
A radiation detection sensor for detecting radiation;
A first wireless communication unit;
A wireless power receiving unit;
a housing that houses the radiation detection sensor, the first wireless communication unit, and the wireless power receiving unit, the housing including a non-opening portion made of a conductive member and an opening portion in which the conductive member is not provided;
a second wireless communication unit that wirelessly communicates with the first wireless communication unit through the opening;
a wireless power supply unit that wirelessly supplies power to the wireless power receiving unit through the opening;
having
The radiation imaging system according to claim 1, wherein the first wireless communication unit is disposed at a position not overlapping with the wireless power receiving unit when viewed from the opening side . The radiation imaging system according to claim 1 , wherein the non-opening portion shields the radiation detection sensor from surrounding electromagnetic waves. 3. The radiation imaging system according to claim 1, wherein the opening is provided on a side of the housing opposite to a side on which the radiation is incident. 4. The radiation imaging system according to claim 1, further comprising a non-conductive member covering the opening. The radiation imaging system according to any one of claims 1 to 4, characterized in that the conductive member is a metal member containing at least one of magnesium, aluminum, and SUS, or a CFRP member. a secondary battery that supplies power to the radiation detection sensor and is supported by the housing ;
6. The radiation imaging system according to claim 1, wherein the secondary battery is charged by power supplied from the wireless power receiving unit. 7. The radiation imaging system according to claim 6, wherein the secondary battery is any one of a lithium ion battery, an electric double layer capacitor, and an all-solid-state battery. 8. The radiation imaging system according to claim 1, further comprising a magnetic sheet for changing a direction of a magnetic field related to the wireless power supply. The radiation imaging system according to any one of claims 1 to 8, characterized in that the frequency band used by the wireless power receiving unit when receiving power is different from the frequency band used by the first wireless communication unit when communicating. The radiation imaging system according to any one of claims 1 to 9, characterized in that, during power reception by the wireless power receiving unit, predetermined communication by the first wireless communication unit and the second wireless communication unit is stopped. The radiation imaging system according to any one of claims 1 to 9, characterized in that during a predetermined communication by the first wireless communication unit and the second wireless communication unit, power reception by the wireless power receiving unit is stopped. The radiation imaging system according to any one of claims 1 to 11, characterized in that the first wireless communication unit and the second wireless communication unit communicate using either visible light or infrared light. The radiation imaging system according to any one of claims 1 to 12, characterized in that the radiation detection sensor is a sensor equipped with an element that directly converts radiation into an electrical signal. The radiation imaging system according to any one of claims 1 to 12, characterized in that the radiation detection sensor is a sensor equipped with a phosphor that converts radiation into light and a photoelectric conversion element that converts the light into an electrical signal. A radiation detection sensor for detecting radiation;
A wireless communication unit;
A wireless power receiving unit;
a housing that houses the radiation detection sensor, the wireless communication unit, and the wireless power receiving unit, the housing having a non-opening portion made of a conductive member and an opening portion in which the conductive member is not provided;
The wireless communication unit communicates with an external device through the opening,
the wireless power receiving unit receives wireless power fed from a wireless power feeding device through the opening ,
The radiographic imaging apparatus according to claim 1, wherein the wireless communication unit is disposed at a position not overlapping with the wireless power receiving unit when viewed from the opening side . A radiation source that emits radiation;
A radiation detection sensor for detecting radiation;
A light source that outputs light;
A wireless power receiving unit;
a housing that houses the radiation detection sensor, the light source, and the wireless power receiving unit, the housing including a non-opening portion made of a conductive member and an opening portion in which the conductive member is not provided;
a wireless power supply unit that wirelessly supplies power to the wireless power receiving unit through the opening,
the light source is disposed at a position overlapping the wireless power receiving unit when viewed from the opening side,
The radiation imaging system according to claim 1, wherein the light source outputs light to the outside of the housing through the opening. The radiation imaging system according to claim 16 , wherein the non-opening portion shields the radiation detection sensor from ambient electromagnetic waves. 18. The radiation imaging system according to claim 16, wherein the opening is provided on a side of the housing opposite to a side on which the radiation is incident. 19. The radiation imaging system according to claim 16, further comprising a light- transmitting member covering the opening. The radiation imaging system according to any one of claims 16 to 19, characterized in that the conductive member is made of a metal member containing at least one of magnesium, aluminum, and SUS, or a CFRP member. a secondary battery that supplies power to the radiation detection sensor and is supported by the housing ;
21. The radiation imaging system according to claim 16, wherein the secondary battery is charged by power supplied from the wireless power receiving unit. 22. The radiation imaging system according to claim 21, wherein the secondary battery is any one of a lithium ion battery, an electric double layer capacitor, and an all-solid-state battery. 23. The radiation imaging system according to claim 16, further comprising a magnetic sheet for changing a direction of a magnetic field related to the wireless power supply. The radiation imaging system according to any one of claims 16 to 23, characterized in that the radiation detection sensor is a sensor equipped with an element that directly converts radiation into an electrical signal. The radiation imaging system according to any one of claims 16 to 23, characterized in that the radiation detection sensor is a sensor equipped with a phosphor that converts radiation into light and a photoelectric conversion element that converts the light into an electrical signal. A radiation detection sensor for detecting radiation;
A light source;
A wireless power receiving unit;
a housing that houses the radiation detection sensor, the light source, and the wireless power receiving unit, the housing having a non-opening portion made of a conductive member and an opening portion in which the conductive member is not provided;
the light source is disposed at a position overlapping the wireless power receiving unit when viewed from the opening side,
The light source outputs light to the outside of the housing through the opening,
The radiographic imaging device, wherein the wireless power receiving unit receives wireless power from a wireless power supply device through the opening.

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