Radiation detection device

Abstract

To provide a radiation detection device capable of attaching / detaching a power source and attaching / detaching the power source even when the power source is expanded.SOLUTION: A radiation imaging device (100) includes a radiation detection panel (1), a battery (8), a battery holder (20), and a housing (101). The housing (101) includes a top surface portion (2), a bottom surface portion (3b), and a side surface portion (3a). The side surface portion (3a) has an opening (9) for inserting and removing the battery (8) into and from the housing (101). The battery holder (20) has a gap (20e) at a position facing a central region on an expansion surface of the battery (8) and a holding portion (20d) for holding an end region of the battery (8), and the battery can be inserted into and removed from the battery holder (20) even when the battery (8) expands.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a radiation detection device, which is used as a medical diagnostic device or a non-destructive testing device, for example, an X-ray flat panel detector. [Background technology]

[0002] Radiation imaging devices (radiation detection devices) that detect radiation that has passed through an object to obtain a radiation image are used in industrial non-destructive testing and medical diagnosis. In recent years, radiation imaging devices that can be operated by power supply from a battery as a power source have become widespread, taking into consideration the portability of radiation imaging devices.

[0003] Patent Document 1 discloses a radiation imaging device in which the battery is replaced by inserting and removing it from the side. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2012-181238 A Summary of the Invention [Problem to be solved by the invention]

[0005] There is room for improvement in terms of maintaining the ease of insertion and removal in the type of radiation imaging device in which the battery is replaced by inserting and removing it from the side as in Patent Document 1. This is because, if the battery expands due to deterioration, it may become difficult to insert and remove the battery (power source) in the radiation imaging device.

[0006] The present invention has been made in consideration of such problems, and has an object to provide a radiation detection device in which the power supply can be attached and detached even when the power supply expands. [Means for solving the problem]

[0007] The radiation detection device of the present invention comprises a radiation detection panel that operates with power supplied from a power supply unit, and a housing capable of accommodating the power supply unit and the radiation detection panel, the housing having an incident surface portion through which radiation is incident on the radiation detection panel, a rear surface portion located opposite the incident surface portion, and a side surface portion connecting the incident surface portion and the rear surface portion, the housing having an accommodating portion that accommodates the power supply unit and that allows the power supply unit to be inserted and removed laterally through an opening provided in a partial area of ​​the side surface portion, and the accommodating portion has a holding portion that removably holds an end area of ​​the expansion surface of the power supply unit so that an area that may face a central area of ​​the expansion surface of the power supply unit when the power supply unit is inserted or removed can face the central area with a gap therebetween. Effect of the Invention

[0008] It is possible to provide a radiation detection device in which the power supply can be attached and detached even when the power supply expands. [Brief description of the drawings]

[0009] [Figure 1] Fig. 1(a) is a perspective view of the top surface side of the radiation imaging apparatus, and Fig. 1(b) is a perspective view of the bottom surface side of the radiation imaging apparatus. [Diagram 2] FIG. 2 is a diagram showing a cross section taken along line AA of the radiation imaging apparatus. [Diagram 3] FIG. 1 is a diagram showing a cross section taken along line BB of the radiation imaging apparatus. [Figure 4] FIG. 2 is a diagram showing the appearance of a battery. [Diagram 5] FIG. [Figure 6] Fig. 6(a) is a diagram showing how the battery is inserted, and Fig. 6(b) is a diagram showing how the battery is attached. [Figure 7] Fig. 7(a) is a diagram showing a radiation imaging device having an air vent, and Fig. 7(b) is a diagram showing a radiation imaging device having an air vent. [Figure 8]Fig. 8(a) is a diagram showing the battery holder as viewed from the opening side, Fig. 8(b) is a diagram showing the battery holder as viewed from the opening side with a battery inserted, and Fig. 8(c) is a diagram showing the battery holder as viewed from the opening side with an expanded battery inserted. [Figure 9] Fig. 9(a) is a diagram showing Modification 1. Fig. 9(b) is a diagram showing Modification 2. Fig. 9(c) is a diagram showing Modification 3. [Figure 10] FIG. 1 is a diagram illustrating a configuration of a radiation imaging system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, specific examples of the embodiment of the present invention will be given and will be described in detail with reference to the drawings. Note that the following examples do not limit the invention according to the claims. Although multiple components of the device are given in the examples, not all of these components are necessarily essential to the invention. For example, some components may be deleted or replaced. Also, features of multiple examples may be combined.

[0011] Example 1 <System> A radiation imaging system, which is an environment in which a radiation imaging device (radiography device, radiation detection device) is used, will be described. Fig. 10 is a diagram showing a schematic configuration of the radiation imaging system. The radiation imaging system 1000 includes a radiation imaging device 100, a control device 400, a radiation generation unit 300, a RIS 510, a PACS 520, and an HIS 530. Note that RIS is an abbreviation for Radiology Information Systems. PACS is an abbreviation for Picture Archiving and Communication Systems (image server). HIS is an abbreviation for Hospital Information Systems.

[0012] The radiation generating unit (radiation generating device, radiation irradiating device) 300 includes a radiation tube that generates radiation, and irradiates a subject 600, such as a patient, with radiation. Here, radiation includes not only X-rays, but also α-rays, β-rays, γ-rays, particle rays, cosmic rays, and the like.

[0013] The radiation imaging device 100 generates an image based on radiation irradiated from a radiation generating unit 300. The radiation imaging device 100 is, for example, a flat panel detector. The radiation imaging device 100 will be described in detail later.

[0014] The control device 400 is a device that relays between the radiation imaging device 100, the radiation generation unit 300, and each device that can be connected via a network 500. The control device 400 has an imaging control unit 410, an irradiation control unit 420, and a UI control unit 430.

[0015] The imaging control unit 410 performs various controls for radiation imaging (radiography) by communicating with the radiation imaging apparatus 100. For example, the imaging control unit 410 executes various communication processes associated with radiation imaging with respect to the radiation imaging apparatus 100. In this communication process, setting information for imaging conditions, setting information for operation control, image information, information on reaching dose, and the like are exchanged.

[0016] The irradiation control unit 420 communicates with the radiation generation unit 300 and controls the irradiation conditions of radiation.

[0017] The irradiation control unit 420 outputs information such as an irradiation control signal to the radiation generation unit 300 based on the acquired dose information.

[0018] The irradiation control signal transmitted from the irradiation control unit 420 to the radiation generating unit 300 may include two signals: a stop signal (irradiation stop signal) for stopping irradiation of radiation, and an irradiation signal (non-irradiation stop signal) for irradiating radiation. The irradiation control unit 420 can control the start and stop of irradiation of radiation from the radiation generating unit 300 by controlling the output of both the stop signal and the irradiation signal, or one of the signals.

[0019] The UI control unit 430 controls the input of information via the operation unit 431 and the output of information via the display unit 432. For example, imaging conditions for radiation imaging are input via the operation unit 431, and results of radiation imaging are output via the display unit 432. The operation unit 431 includes input devices such as a keyboard, a pointing device (e.g., a mouse, etc.), and a touch panel. The display unit 432 includes a monitor such as a liquid crystal display.

[0020] A technician inputs various information required for radiation imaging to the UI control unit 430. The input information includes a dose, an exposure time (ms), a tube current (mA), a tube voltage (kV), and an irradiation field which is an area where radiation is detected. The information is transmitted to the radiation imaging device 100 via the imaging control unit 410.

[0021] The imaging control unit 410, the irradiation control unit 420, and the UI control unit 430 can cooperate with each other by communicating with each other. In Fig. 10, the control device 400 is illustrated as one device for the sake of simplicity, but the control device 400 may be composed of multiple devices. For example, the imaging control unit 410, the irradiation control unit 420, and the UI control unit 430 may each be an independent device.

[0022] The control device 400 is connected to the radiation generating unit 300 by wire and to the radiation imaging device 100 by wired or wireless communication, and communicates with each device to control its operation. The wired communication can be performed via a LAN (Local Area Network) such as Ethernet (registered trademark), but communication may be performed by other wired communication methods. The wireless communication unit, which is a configuration for wireless communication, includes, for example, an antenna for transmitting and receiving radio waves and a communication IC. The circuit board including the communication IC performs communication processing of a protocol based on a wireless LAN via the antenna. Note that there are no particular limitations on the frequency band, standard, or method for wireless communication, and methods such as NFC, close proximity wireless such as Bluetooth, and UWB may be used, or a plurality of wireless communication methods may be provided and appropriately selected for communication.

[0023] The control device 400 is also connected to the RIS 510, PACS 520, and HIS 530 via a network 500, and can exchange radiographic images, patient information, etc. In Fig. 10, the radiation imaging system 1000 is described as including the RIS 510, PACS 520, and HIS 530, but the system may not include at least some of these.

[0024] <Radiation imaging device> A radiation imaging apparatus in a first embodiment will be described. Fig. 1(a) is a perspective view of the top surface side of the radiation imaging apparatus. Fig. 1(b) is a perspective view of the bottom surface side of the radiation imaging apparatus. Fig. 2 is a cross-sectional view of the radiation imaging apparatus taken along line AA.

[0025] The radiation imaging device 100 has a radiation detection panel 1 for converting radiation into an electric signal. The radiation detection panel 1 has a function of converting incident radiation into an electric signal. The radiation detection panel 1 is composed of a sensor substrate 1a in which a plurality of photoelectric conversion elements are arranged two-dimensionally on a glass substrate or a resin film base material, a phosphor layer 1b arranged on the sensor substrate 1a, and a phosphor protective film 1c arranged on the phosphor layer 1b. The plurality of 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 is made of a material with relatively high moisture resistance and is used to protect the phosphor layer 1b. Here, the radiation detection panel 1 has an effective imaging area in which incident radiation can be imaged as a radiation image. In the radiation detection panel 1, the entire area on a plane on which a plurality of photoelectric conversion elements are arranged, or a part of the area, is defined as the effective imaging area when viewed from the direction of incidence of radiation.

[0026] With the above-mentioned 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. 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.

[0027] The radiation detection panel 1 is electrically connected to a control board 5 via a flexible circuit board 4. The control board 5 reads out the electrical signals converted by the radiation detection panel 1 and processes the read out electrical signals. The control board 5 converts the electrical signals into digital signals to obtain radiation image data.

[0028] The above-mentioned components are supported by a support base 6. The support base 6 supports the radiation detection panel 1 on the radiation incidence surface side. The support base 6 also supports a control board 5 on a surface opposite to the surface supporting the radiation detection panel 1. A buffer material 7 for protecting the radiation detection panel 1 from external forces may be provided between the housing 101 and the radiation detection panel 1. The radiation imaging device 100 further includes a battery 8 for supplying power used for the operation of the radiation detection panel 1 and the control board 5. The battery 8 is an example of a built-in power source (power source unit) detachably provided in the radiation imaging device 100. As the built-in power source, a lithium ion battery, a lithium ion polymer battery, an all-solid-state battery, an electric double layer capacitor, or a capacitor can be used. In this embodiment, only one battery is provided, but this is not limited thereto, and multiple batteries may be provided.

[0029] The housing 101 is a structure capable of containing and housing the components described above. The housing 101 is composed of an incident surface 2 (incident surface portion, top surface portion) where radiation is incident, and a rear housing 3. The rear housing 3 has a rear portion 3b (bottom surface portion) that contacts the installation surface at a position facing (opposite side of) the incident surface 2 with the radiation detection panel 1 in between, and four side portions 3a (sidewall portions). Note that in the rear housing 3, the rear portion 3b (bottom surface) and the four side portions 3a are formed from an integrated structural material.

[0030] It is desirable for the incident surface 2 to have a relatively high radiation transmittance in order to allow radiation to be incident on the radiation detection panel 1. Furthermore, it is desirable for the incident surface 2 to be light in weight and to ensure a certain level of strength against impacts. For this reason, for example, a resin material or CFRP (carbon fiber reinforced plastic) is used for the incident surface 2.

[0031] It is desirable for rear housing 3 to have sufficient strength against drops and shocks, be lightweight to reduce the burden on the user during transportation, and ensure excellent operability for the user. For example, a metal alloy containing magnesium or aluminum or both, CFRP, fiber reinforced resin, etc. are used as the material for rear housing 3.

[0032] In this embodiment, the housing 101 has a two-part structure in which the member of the incident surface 2 and the member of the rear housing 3 are joined by fastening with screws or bonding with an adhesive. In this embodiment, the rear housing 3 and the side portion 3a are integrally formed and separated from the incident surface 2, but the housing may have a two-part structure in which the incident surface 2 and the side portion 3a are integrally formed and separated from the rear portion 3b. In the housing 101 having a two-part structure as in this embodiment, there are fewer gaps (grooves) at the joints between the members (joints) compared to the housings having a three-part structure that have been widely used in the past. Therefore, cleaning work such as chemical disinfection and ultraviolet sterilization can be performed efficiently. In addition, the rigidity of the housing can be easily improved.

[0033] <Battery mounting structure> Fig. 3 is a diagram showing a cross section of the radiation imaging device taken along line BB Fig. 4 is a diagram showing the appearance of the battery.

[0034] An opening 9 for inserting and removing the battery 8 into and from the housing is provided in a partial area of ​​at least one of the four side surface parts 3a of the rear housing 3. An openable and closable opening cover 10 (lid member) is also provided to cover the opening 9. In this embodiment, the opening 9 and the opening cover 10 are rectangular, but are not limited thereto, and may be substantially rectangular or elliptical, and the opening cover 10 may be separate from or integrated with the battery 8. In this embodiment, the battery 8 is substantially hexahedral in shape as shown in FIG. 4. However, the shape of the battery 8 is not limited thereto, and may be, for example, narrower on the terminal 8d side of the battery 8 so as to facilitate insertion into the opening 9. The battery 8 may also be asymmetric in shape so as not to be attached upside down. A seal member (not shown) is preferably provided between the opening cover 10 and the opening 9. The seal member is preferably made of rubber or a cushioning material to prevent the patient's body fluids, disinfectant, and the like from entering the inside of the radiation imaging device 100. The opening 9 is located higher than the installation surface by the thickness of the rear portion 3b. Therefore, even if the radiation imaging device 100 is placed on a dirty installation surface, it is difficult for water to enter through the opening 9. The sealant may be disposed on either the opening cover 10 side or the opening 9 side. It is preferable that the sealant provides waterproofing between the cover 10 and the battery holder 20, and it is further preferable that waterproofing between the cover 10 and the battery holder 20 makes the entire housing 101 waterproof.

[0035] Next, the battery holder 20 that functions as a storage section that holds and stores the battery 8 will be described with reference to Figs. 3, 5, 8(a), 8(b), 8(c), 9(a), 9(b), and 9(c). Fig. 5 is an external view illustrating only the battery holder 20. Fig. 8(a) is a view showing the battery holder from the opening side. Fig. 8(b) is a view showing the battery holder with a battery inserted from the opening side. Fig. 8(c) is a view showing the battery holder with an expanded battery inserted from the opening side. Fig. 9(a) is a view showing Modification 1. Fig. 9(b) is a view showing Modification 2. Fig. 9(c) is a view showing Modification 3.

[0036] Battery holder 20 includes opening 9 and is composed of holder side portions 20a, 20b and holder upper and lower surface portions 20c (one side is shown in perspective), which is a collective term for the holder upper surface portion and the holder lower surface portion. Battery holder 20 may be formed as a part of housing 101 or support base 6, or may be a component (holding member) independent of housing 101 or support base 6.

[0037] The battery 8 may expand due to repeated charging and discharging. In this embodiment, even in such a case, the battery holder 20 has a structure that allows the battery 8 to be inserted and removed from the battery holder 20. Specifically, as shown in FIG. 8(a), the battery holder 20 has a holding portion 20d that holds the battery 8 in the end region of the expanding surface of the battery 8, i.e., in a portion where the influence of the expansion is small. As shown in FIG. 8(b) and FIG. 8(c), the battery holder 20 forms a gap 20e in the center region of the expanding surface of the battery 8, i.e., in the vicinity of a portion where the influence of the expansion is significant (hereinafter referred to as the expanding portion, etc.). That is, the upper and lower surface portions 20c of the battery holder 20 that face the expanding portion of the battery 8 are arranged so as to face the battery 8 with a gap therebetween. The end region is, for example, a region within 25% of the length from both ends of the expanding surface in the width direction. The expanding surface is the surface that is most significantly influenced by the expansion among the surfaces that constitute the battery 8, for example, the surface that has the largest area among the surfaces that constitute the battery 8.

[0038] The size of the gap 20e between the battery 8 and the battery holder 20, that is, the height of the gap 20e, is preferably larger than the amount of expansion that occurs in the normal range of use of the battery 8, and is also preferably larger than the amount of expansion that occurs due to deterioration of the battery 8. The height of the gap 20e is preferably 10% or more of the width (thickness) between the surface of the battery 8 where the expansion of the battery 8 occurs and the surface opposite to that surface. The clearance between the holding portion 20d and the battery 8 is preferably the minimum size that allows the battery 8 to be inserted and removed from the battery holder 20, taking into account the tolerance (size tolerance) regarding the size of the holding portion 20d and the battery 8.

[0039] Regarding the battery 8, the expansion of the battery 8 often occurs on the wide surface 8b, but this is not limited to this. Also, the exterior of the battery 8 is often made of resin, but this is not limited to this. In Fig. 3 and Fig. 5, the gap 20e is formed on both opposing surfaces of the battery holder 20, but this is not limited to this, and it may be formed only on one surface. Also, in Fig. 3 and Fig. 5, the gap 20e is formed on the surface where the battery 8 may expand, and the holding portion 20d is formed on the part where the battery does not expand. However, the structure of the holding portion 20d is not limited to this, and the gap e and the holding portion 20d may be formed regardless of the position of the surface where the battery 8 may expand. Also, in Fig. 3, Fig. 4, and Fig. 5, the gap 20e is formed only on the battery holder 20, but this is not limited to this, and it may be formed on at least one of the battery 8 and the battery holder 20. Also, in Fig. 8(a), the holding portion 20d is formed by protruding a part of the holder side portion 20b, but the holding portion may be formed by another method. For example, as in Modification 1 shown in FIG. 9(a), the holding portion 20d may be formed by making a part of the upper and lower surface portions 20c of the battery holder 20 protrude like a protrusion. Also, as in Modification 2 shown in FIG. 9(b), the holding portion 20d may be formed by making a part of the exterior of the battery 8 protrude like a protrusion. Also, as in Modification 3 shown in FIG. 9(c), the battery 8 may be held on a surface different from the expansion surface. In this case, the protrusion may be on the holder side surface portion 20b or on the battery 8 side.

[0040] Incidentally, when inserting or removing the battery 8 into or from the battery holder 20, air may compress or expand inside the battery holder 20, causing air resistance in a direction that hinders the insertion or removal of the battery 8. The gap 20e allows air to flow between the inside and outside of the battery holder 20, and therefore also functions as an air passage that can reduce air resistance.

[0041] If an opening 9 is provided in the side surface portion 3a, it is expected that the width of the opening 9 will be narrow, making it difficult to remove the attached battery 8. Therefore, as shown in Figs. 6(a) and 6(b), it is preferable to place a biasing spring 11 at the back side of the mounting area of ​​the battery 8 (corresponding to the holder side surface portion 20a). Fig. 6(a) is a diagram showing the state in which the battery is inserted. Fig. 6(b) is a diagram showing the state in which the battery is mounted. When the battery 8 is pushed in to mount it, a biasing force is applied to the biasing spring 11. Therefore, when the mounted state is released, the biasing spring 11 causes the battery 8 to pop out, making it easier for the user to grab and remove the battery 8. Examples of mechanisms for applying a biasing force include, but are not limited to, a spring or rubber.

[0042] Next, a mechanism for holding and fixing the battery 8 to which a biasing force is applied will be described. There are various methods for the mechanism for holding the battery 8, but it is preferable to use a battery lock 12 (fixing member). A spring 13 is connected to the battery lock 12, and when the battery 8 is inserted into the battery holder 20, the battery 8 presses the slope formed on the exterior side of the battery lock 12, causing the battery lock 12 to retract to the rear side and not hinder the insertion. When the battery 8 is completely attached, the battery lock 12 is pushed back by the biasing force of the spring 13, and the battery 8 is held so as not to pop out. Conversely, when removing the battery 8, the battery lock 12 is retracted by a finger or the like, causing the battery 8 to pop out due to the biasing force of the biasing spring 11. It is preferable that the biasing spring 11 and the battery lock 12 apply the biasing force and hold the battery 8 on a surface where the battery 8 does not expand.

[0043] In conventional radiation imaging devices, the battery 8 is often inserted from the wide surface 8b side, or the wide surface 8b is exposed to the outside when the battery 8 is attached. In such a structure, an opening of a size corresponding to the wide surface 8b is required. Therefore, the amount (total length) of the groove generated when the opening is covered with an opening cover is also large.

[0044] In contrast, in this embodiment, the battery 8 is inserted into the radiation imaging device 100 from the short side surface 8a, and the other surfaces are not exposed to the outside when the battery 8 is attached. Therefore, the size of the opening 9 can be the same as the short side surface 8a. In addition, the amount of the groove (perimeter, total length) generated when the opening 9 is covered with the opening cover 10 can be small. Therefore, cleaning work such as chemical disinfection and ultraviolet sterilization can be efficiently performed. Note that the battery 8 in this embodiment is attached to the side closer to the back surface portion 3b in the Z-axis direction as shown in FIG. 3. In detail, the battery 8 is disposed on the opposite side to the radiation detection panel 1 with the support base sandwiched therebetween. The battery 8 is attached so as to overlap with the radiation detection panel 1 in the X-axis direction in FIG. 3. That is, the battery 8 can be attached without securing additional space in the X-axis direction with respect to the space defined by the size of the radiation detection panel 1, and the radiation imaging device 100 can be prevented from becoming enlarged in the X-axis direction.

[0045] Next, the location of the battery 8 will be described. As shown in FIG. 3, the battery 8 is disposed between the radiation detection panel 1 and the rear part 3b. The battery 8 is disposed between the remaining area of ​​the side part 3a in the Z-axis direction where the opening 9 is not provided and the rear part 3b. By disposing the battery 8 between the radiation detection panel 1 and the rear part 3b, it is possible to suppress an increase in size and weight of the radiation imaging device 100, and to suppress a decrease in portability and workability of the device. By disposing the battery 8 between the protruding part toward the inside of the side part 3a and the rear part 3b, it is possible to suppress a decrease in the load capacity of the radiation imaging device 100. In detail, the battery disposed between the protruding part toward the inside of the side part 3a and the rear part 3b can bear a part of the load from the side part 3a. Therefore, when a load is applied from the entrance surface 2 side, for example, when a load such as a patient standing on the radiation imaging device 100 occurs, the battery holder 20 distributes this load, so that a decrease in the load capacity can be suppressed.

[0046] <Effects> As described above, according to the radiation imaging device 100 described in the first embodiment, it is possible to insert and remove the battery 8 from the side of the housing 101. Moreover, the gap 20e enables the battery 8 to be inserted and removed from the battery holder 20 when the battery 8 expands. Furthermore, the gap 20e can be used as an air passage for reducing air resistance generated when the battery 8 is inserted and removed.

[0047] Example 2 In the first embodiment, an example was described in which the gap 20e allows the battery 8 to be inserted and removed even when the battery 8 is inflated. In the second embodiment, an example will be described in which the first ventilation hole 21a and the second ventilation hole 21b are used to reduce the air resistance generated in the battery holder 20 when the battery 8 is inserted and removed. Note that the various configurations appearing in the second embodiment are the same as those in the first embodiment, except for the portions related to the above-mentioned features. Therefore, the same reference numerals are used for the same configurations, and detailed descriptions thereof will be omitted.

[0048] FIG. 7 is a diagram showing a BB cross section of the radiation imaging device including the first ventilation opening 21a and the second ventilation opening 21b. The radiation imaging device 100 of the second embodiment is provided with the first ventilation opening 21a in a part of the battery holder 20. The first ventilation opening 21a allows air to flow in and out between the battery holder 20 and the inside of the housing 101. The first ventilation opening 21a makes it possible to reduce air resistance that hinders the insertion and removal of the battery 8 when the battery 8 is inserted and removed. The expansion of the battery 8 may reduce the gap between the battery 8 and the battery holder 20 in the gap 20e. Then, the gap 20e may not function as an air passage for reducing the air resistance that occurs when the battery 8 is inserted and removed. In such a case, it is desirable to reduce the air resistance when the battery 8 is inserted and removed by the first ventilation opening 21a.

[0049] This is particularly effective when the battery holder 20 is in a closed state. The first ventilation hole 21a preferably has dust-proof and drip-proof properties (dust-proof and waterproof properties) to prevent foreign objects and liquids from entering the inside of the housing 101 from the battery holder 20. The first ventilation hole 21a is depicted in FIG. 7 as being provided in the holder side portion 20a of the battery holder 20, but this is not a limitation and it is sufficient that the first ventilation hole 21a is provided in a part of the battery holder 20.

[0050] Further, the radiation imaging device 100 of the second embodiment may include a second ventilation port 21b in a part of the housing 101. The second ventilation port 21b allows air to flow in and out between the inside and outside of the housing 101. The first ventilation port 21a and the second ventilation port 21b allow air to flow in and out between the battery holder 20 and the outside of the housing 101. The second ventilation port 21b is preferably dust-proof and drip-proof in order to prevent foreign matter or liquid from entering the inside of the housing 101 from the outside. The second ventilation port 21b is preferably capable of allowing air to flow in and out between the inside and outside of the housing 101 in order to adjust the air pressure inside the housing 101. The second ventilation port 21b is preferably used as a member for transmitting sound generated by a speaker or the like provided inside the housing 101 to the outside of the housing 101. Further, second ventilation opening 21b is depicted in FIG. 7 as being provided in rear portion 3b of housing 101, but this is not limited thereto, and it is sufficient that second ventilation opening 21b is provided in a part of housing 101.

[0051] <Effects> As described above, according to the radiation imaging device 100 described in the second embodiment, the first ventilation hole 21a and the second ventilation hole 21b can reduce the air resistance generated when inserting and removing the battery 8. In addition, the second ventilation hole 21b can be used to adjust the air pressure in the housing 101 and to transmit sound generated inside the housing 101 to the outside of the housing 101.

[0052] Example 3 In the second embodiment, an example is described in which the first ventilation opening 21a and the second ventilation opening 21b reduce the air resistance generated when the battery 8 is inserted or removed. In the third embodiment, an example is described in which the third ventilation opening 21c reduces the air resistance generated in the battery holder 20 when the battery 8 is inserted or removed. Note that the various configurations appearing in the third embodiment are the same as those in the first and second embodiments, except for the portions related to the above-mentioned features. Therefore, the same reference numerals are used for the same configurations, and detailed descriptions thereof will be omitted.

[0053] FIG. 8 is a diagram showing a BB cross section of the radiation imaging device including the third ventilation hole 21c. In the radiation imaging device 100 of the third embodiment, the battery holder 20 is formed as a part of the housing 101, and further includes the third ventilation hole 21c in a part of the battery holder 20. The third ventilation hole 21c allows air to flow in and out between the battery holder 20 and the outside of the housing 101. The third ventilation hole 21c makes it possible to reduce air resistance that hinders the insertion and removal of the battery 8 when the battery 8 is inserted and removed. The gap between the battery 8 and the battery holder 20 in the gap 20e becomes smaller due to the expansion of the battery 8. Then, the gap 20e may not function as an air passage for reducing the air resistance that occurs when the battery 8 is inserted and removed. In such a case, it is effective to reduce the air resistance when the battery 8 is inserted and removed by the third ventilation hole 21c. Moreover, it is preferable that third ventilation hole 21c has dust-proof and drip-proof properties in order to prevent foreign objects and liquids from entering battery holder 20 from outside housing 101. Although third ventilation hole 21c is depicted in Fig. 8 as being provided in rear portion 3b of housing 101, this is not limited thereto, and third ventilation hole 21c is preferably provided in side portion 3a of housing 101 in order to realize a seamless structure of rear portion 3b.

[0054] <Effects> As described above, according to the radiation imaging apparatus 100 of the third embodiment, the air resistance generated when the battery 8 is inserted or removed can be reduced by the third ventilation hole 21c.

[0055] (Other Examples) The present invention is not limited to the above-mentioned embodiments, and various modifications (including organic combinations of the embodiments) are possible based on the spirit of the present invention, and are not excluded from the scope of the present invention. In other words, the present invention includes all configurations that combine the above-mentioned embodiments and their modifications.

[0056] (Additional Note) The present embodiment includes the following disclosure.

[0057] [Disclosure 1] a radiation detection panel that operates by power supply from a power supply unit; A housing capable of accommodating the power supply unit and the radiation detection panel, a housing having an incident surface portion through which radiation is incident on the radiation detection panel, a rear surface portion located on the opposite side of the incident surface portion, and a side surface portion connecting the incident surface portion and the rear surface portion, the housing has a housing portion that houses the power supply unit, the housing portion having an opening that allows the power supply unit to be inserted and removed laterally through the opening, the opening being provided in a partial region of the side surface portion; a holding portion that holds an end region of the expansion surface of the power supply unit in an insertable / removable manner so that an area that may face the central area of ​​the expansion surface of the power supply unit when the power supply unit is inserted or removed faces the central area with a gap therebetween.

[0058] [Disclosure 2] The radiation imaging apparatus described in Disclosure 1, wherein the power supply unit is a lithium ion polymer battery.

[0059] [Disclosure 3] The radiation detection device according to Disclosure 1 or 2, wherein the gap is larger than the deformation of the expansive surface that occurs in the normal range of use of the power supply unit.

[0060] [Disclosure 4] The radiation detection device according to Disclosure 1 or 2, wherein the gap is larger than deformation of the expansive surface caused by deterioration of the power supply unit.

[0061] [Disclosure 5] 3. The radiation detection device according to claim 1, wherein the gap is equal to or greater than 10% of the thickness of the power supply unit.

[0062] [Disclosure 6] The radiation detection device described in any one of Disclosures 1 to 5, wherein the housing further has a fixing member for fixing the power supply unit within the housing, and the fixing member fixes the power supply unit at a location where deformation of the expansive surface does not occur.

[0063] [Disclosure 7] The radiation detection device according to any one of Disclosures 1 to 6, wherein the expansive surfaces are two opposing surfaces having the largest areas in the power supply unit.

[0064] [Disclosure 8] The radiation detection device described in any one of Disclosures 1 to 7, characterized in that the clearance between the holding portion and the power supply unit is the minimum size that enables the power supply unit to be inserted and removed, taking into account size tolerances between the holding portion and the power supply unit.

[0065] [Disclosure 9] The radiation detection device according to any one of Disclosures 1 to 8, wherein a gap for providing the distance is formed in at least one location of the housing section.

[0066] [Disclosure 10] The radiation detection device according to any one of Disclosures 1 to 9, wherein the gap is defined by the shape of at least one of the power supply unit and the housing unit.

[0067] [Disclosure 11] The radiation detection device according to any one of Disclosures 1 to 10, wherein the exterior of the power supply unit is made of resin.

[0068] [Disclosure 12] The radiation detection device described in any one of Disclosures 1 to 11, wherein the gap can be used as an air passage for the purpose of reducing air resistance that occurs when the power supply unit is inserted or removed from the housing.

[0069] [Disclosure 13] The radiation detection device according to any one of Disclosures 1 to 12, wherein the container has a first ventilation port through which air can flow in and out of the container and the housing.

[0070] [Disclosure 14] The radiation detection device described in Disclosure 13, wherein the first ventilation hole has dustproof and waterproof properties.

[0071] [Disclosure 15] The radiation detection device described in Disclosure 14, wherein the housing has a second ventilation hole through which air can flow in and out of the inside and outside of the housing.

[0072] [Disclosure 16] The radiation detection device described in Disclosure 15, wherein the second ventilation hole has dustproof and waterproof properties.

[0073] [Disclosure 17] The radiation detection device described in Disclosure 15, wherein the second ventilation hole is used to adjust the air pressure inside the housing.

[0074] [Disclosure 18] The radiation detection device described in Disclosure 15, wherein the second ventilation hole is used to transmit sound generated from inside the housing to the outside of the housing.

[0075] [Disclosure 19] A radiation detection device described in any one of Disclosures 1 to 18, characterized in that the storage section is formed as part of the housing and has a third ventilation port through which air can flow in and out between the storage section and the outside of the housing.

[0076] [Disclosure 20] The radiation detection device described in Disclosure 19, wherein the third ventilation hole has dustproof and waterproof properties.

[0077] [Disclosure 21] The radiation detection device described in Disclosure 19, wherein the third ventilation hole is provided on a side surface of the housing.

[0078] [Disclosure 22] a radiation detection panel that operates by power supply from a power supply unit; A housing capable of accommodating the power supply unit and the radiation detection panel, a housing having an incident surface portion through which radiation is incident on the radiation detection panel, a rear surface portion located on the opposite side of the incident surface portion, and a side surface portion connecting the incident surface portion and the rear surface portion, the housing has a housing portion that houses the power supply unit, the housing portion having an opening that allows the power supply unit to be inserted and removed laterally through the opening, the opening being provided in a partial region of the side surface portion; a radiation detection device characterized in that the accommodating section has a holding section that holds a surface other than the expansion surface of the power supply section in an insertable and removable manner so that an area that can face the expansion surface of the power supply section when the power supply section is inserted or removed can face the expansion surface with a gap therebetween. [Explanation of symbols]

[0079] 100 Radiation imaging device 101 Case 1 Radiation detection panel 3 Rear case 3a Side part 3b Back part 6 Support base 8 Battery 9 aperture 10 Battery cover 20 Battery holder 20e void

Claims

1. a radiation detection panel that operates by power supply from a power supply unit; a housing capable of housing the power supply unit and the radiation detection panel, the housing having an incident surface unit through which radiation is incident on the radiation detection panel, a rear surface unit located on the opposite side of the incident surface unit, and a side surface unit connecting the incident surface unit and the rear surface unit; the housing has a housing portion that houses the power supply unit, the housing portion having an opening that allows the power supply unit to be inserted and removed laterally through the opening, the opening being provided in a partial region of the side surface portion; a holding portion that holds an end region of the expansion surface of the power supply unit in an insertable / removable manner so that an area that may face the central area of ​​the expansion surface of the power supply unit when the power supply unit is inserted or removed faces the central area with a gap therebetween.

2. 2. The radiation imaging apparatus according to claim 1, wherein the power supply unit is a lithium ion polymer battery.

3. 2. The radiation detection device according to claim 1, wherein the gap is larger than deformation of the expansive surface that occurs in a normal range of use of the power supply unit.

4. The radiation detection device according to claim 1 , wherein the gap is larger than deformation of the expansive surface caused by deterioration of the power supply unit.

5. 2. The radiation detection device according to claim 1, wherein the gap is equal to or greater than 10% of a thickness of the power supply unit.

6. 2. The radiation detection device according to claim 1, wherein the housing further includes a fixing member for fixing the power supply unit within the housing, the fixing member fixing the power supply unit at a location where deformation of the expansive surface does not occur.

7. 2. The radiation detection device according to claim 1, wherein the expansive surfaces are two opposing surfaces having the largest areas in the power supply unit.

8. 2. The radiation detection device according to claim 1, wherein a clearance between the holding portion and the power supply unit is the minimum size that enables the power supply unit to be inserted and removed, taking into account size tolerances between the holding portion and the power supply unit.

9. 2. The radiation detection device according to claim 1, wherein a gap for providing the distance is formed in at least one location of the housing portion.

10. The radiation detection device according to claim 1 , wherein the gap is defined by a shape of at least one of the power supply unit and the housing unit.

11. 2. The radiation detection device according to claim 1, wherein the exterior of the power supply unit is made of resin.

12. 2. The radiation detection device according to claim 1, wherein the gap can be used as an air passage for reducing air resistance that occurs when the power supply unit is inserted into or removed from the housing.

13. 2. The radiation detection device according to claim 1, wherein the container has a first ventilation hole through which air can flow in and out of the container and the housing.

14. 14. The radiation detection device according to claim 13, wherein the first ventilation hole has dust-proof and water-proof properties.

15. 15. The radiation detection device according to claim 14, wherein the housing has a second ventilation hole through which air can flow between the inside and the outside of the housing.

16. 16. The radiation detection device according to claim 15, wherein the second ventilation hole has dust-proof and water-proof properties.

17. 16. The radiation detection device according to claim 15, wherein the second ventilation hole is used to adjust the air pressure inside the housing.

18. 16. The radiation detection device according to claim 15, wherein the second ventilation hole is used to transmit sound generated from inside the housing to the outside of the housing.

19. 2. The radiation detection device according to claim 1, wherein the container is formed as a part of the housing and has a third ventilation hole through which air can flow in and out between the container and the outside of the housing.

20. 20. The radiation detection device according to claim 19, wherein the third ventilation hole has dust-proof and water-proof properties.

21. The radiation detection device according to claim 19 , wherein the third ventilation hole is provided on a side surface of the housing.

22. a radiation detection panel that operates by power supply from a power supply unit; a housing capable of housing the power supply unit and the radiation detection panel, the housing having an incident surface unit through which radiation is incident on the radiation detection panel, a rear surface unit located on the opposite side of the incident surface unit, and a side surface unit connecting the incident surface unit and the rear surface unit; the housing has a housing portion that houses the power supply unit, the housing portion having an opening that allows the power supply unit to be inserted and removed laterally through the opening, the opening being provided in a partial region of the side surface portion; a radiation detection device characterized in that the accommodating section has a holding section that holds a surface other than the expansion surface of the power supply section in an insertable and removable manner so that an area that can face the expansion surface of the power supply section when the power supply section is inserted or removed can face the expansion surface with a gap therebetween.

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