Radiation detector, method for manufacturing radiation detector, and scintillator panel unit

Abstract

To provide a radiation detector which can achieve both increased area of a radiation detection area and enhanced resolution of radiographic images, and to provide a manufacturing method of a radiation detector, and a scintillator panel unit.SOLUTION: A radiation detector 1 comprises: a sensor panel 2 with a light reception surface 2a; and first and second scintillator panels 10, 20 arranged next to each other along the light reception surface 2a on the light reception surface 2a. The first scintillator panel 10 comprises: a first substrate 11; and a first scintillator layer 12 having a plurality of columnar crystals and extending to a first portion 11b of the first substrate 11. The second scintillator panel 20 comprises: a second substrate 21; and a second scintillator layer 22 having a plurality of columnar crystals and extending to a second portion 21b of the second substrate 21. The first scintillator panel 10 has a first angle θ1 of 90 degrees or less. The second scintillator panel 20 has a second angle θ2 of 90 degrees or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a radiation detector, a method for manufacturing a radiation detector, and a scintillator panel unit. [Background technology]

[0002] A radiation detector is known that includes a sensor panel having a light receiving surface and a scintillator panel arranged on the light receiving surface, in which the scintillator layer in the scintillator panel is made of a plurality of columnar crystals, and the angle between the surface of the scintillator panel facing the sensor panel and the side surface of the scintillator panel exceeds 90 degrees (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-060757 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned radiation detector, as the area of ​​the sensor panel increases, there is a demand for a larger radiation detection region. However, when the scintillator layer of the scintillator panel is made of a plurality of columnar crystals, it is easy to obtain a high-resolution radiation image, but it is difficult to increase the area of ​​the scintillator panel in order to increase the area of ​​the radiation detection region without taking into consideration the shape of the scintillator panel.

[0005] An object of the present invention is to provide a radiation detector that can achieve both an increased area of ​​a radiation detection region and increased resolution of a radiation image, a method for manufacturing such a radiation detector, and a scintillator panel unit suitable for them. [Means for solving the problem]

[0006] The radiation detector of the present invention comprises a sensor panel having a light-receiving surface, and a first scintillator panel and a second scintillator panel arranged on the light-receiving surface adjacent to each other along the light-receiving surface, the first scintillator panel having a first substrate and a first scintillator layer including a plurality of columnar crystals formed on the first substrate, the second scintillator panel having a second substrate and a second scintillator layer including a plurality of columnar crystals formed on the second substrate, the first scintillator panel being arranged on the light-receiving surface with the first scintillator layer located on the light-receiving surface side with respect to the first substrate, the second scintillator panel being arranged on the light-receiving surface with the second scintillator layer located on the light-receiving surface side with respect to the second substrate, The outer edge of the first substrate when viewed from the sensor layer side includes a first portion extending along the second scintillator panel, and the first scintillator layer extends to at least the first portion, the outer edge of the second substrate when viewed from the second scintillator layer side includes a second portion extending along the first scintillator panel, and the second scintillator layer extends to at least the second portion, a first angle formed between the surface of the first scintillator panel facing the sensor panel and the side of the first scintillator panel facing the second scintillator panel is 90 degrees or less, and a second angle formed between the surface of the second scintillator panel facing the sensor panel and the side of the second scintillator panel facing the first scintillator panel is 90 degrees or less.

[0007] In the radiation detector of the present invention, the first scintillator panel and the second scintillator panel are arranged on the light receiving surface of the sensor panel in a state adjacent to each other along the light receiving surface of the sensor panel. In the first scintillator panel and the second scintillator panel, the first scintillator layer reaches a first portion of the outer edge of the first substrate that extends along the second scintillator panel, and the second scintillator layer reaches a second portion of the outer edge of the second substrate that extends along the first scintillator panel. Therefore, one radiation detection region can be obtained by the first scintillator panel and the second scintillator panel while each of the first scintillator panel and the second scintillator panel is configured to a size that can reliably form a plurality of columnar crystals. Moreover, a first angle formed between the surface of the first scintillator panel facing the sensor panel and the side surface of the second scintillator panel facing the second scintillator panel is 90 degrees or less, and a second angle formed between the surface of the second scintillator panel facing the sensor panel and the side surface of the second scintillator panel facing the first scintillator panel is 90 degrees or less. This makes it possible to prevent the joint between the first and second scintillator panels from peeling off from the light receiving surface of the sensor panel due to thermal expansion of air at the joint. Furthermore, since the first scintillator layer and the second scintillator layer are brought closer to each other, it is possible to suppress deterioration in image quality of the radiation image at the joint between the first and second scintillator panels. As described above, the radiation detector of the present invention can achieve both an increased area of ​​the radiation detection region and high resolution of the radiation image.

[0008] In the radiation detector of the present invention, the first angle and the second angle may each be equal to or greater than 45 degrees and less than 90 degrees. This makes it possible to more reliably prevent the joint between the first scintillator panel and the second scintillator panel from peeling off from the light receiving surface of the sensor panel due to thermal expansion of air at the joint.

[0009] In the radiation detector of the present invention, the first substrate and the second substrate may each be flexible, which can improve workability when bonding the first scintillator panel and the second scintillator panel to the light receiving surface of the sensor panel.

[0010] In the radiation detector of the present invention, the first angle and the second angle are each less than 90 degrees, and the sensor panel may be flexible. This allows the entire radiation detector to bend in accordance with the installation environment of the radiation detector, etc. Furthermore, when the entire radiation detector is bent so that the sensor panel is on the outer side relative to the first scintillator panel and the second scintillator panel, physical interference between the first scintillator panel and the second scintillator panel can be prevented.

[0011] The radiation detector of the present invention may further include adhesive layers disposed between the light receiving surface and the first scintillator panel and between the light receiving surface and the second scintillator panel, and each of the first scintillator panel and the second scintillator panel may be adhered to the light receiving surface by the adhesive layer. This allows each of the first scintillator panel and the second scintillator panel to be reliably disposed on the light receiving surface of the sensor panel.

[0012] In the radiation detector of the present invention, the adhesive layer may include a pressure sensitive adhesive or a bonding agent, which allows the first scintillator panel and the second scintillator panel to be reliably attached to the light receiving surface of the sensor panel.

[0013] In the radiation detector of the present invention, the first scintillator panel may further have a first protective layer covering the first substrate and the first scintillator layer, and the second scintillator panel may further have a second protective layer covering the second substrate and the second scintillator layer, thereby more reliably protecting the multiple deliquescent columnar crystals.

[0014] The radiation detector of the present invention may further include a granular phosphor disposed between the first scintillator panel and the second scintillator panel, thereby making it possible to suppress deterioration of the image quality of a radiation image at the joint between the first scintillator panel and the second scintillator panel.

[0015] The radiation detector of the present invention may further include a moisture-proof layer disposed on the first scintillator panel and the second scintillator panel on the side opposite to the sensor panel, and the moisture-proof layer may be continuous across the first scintillator panel and the second scintillator panel. This can prevent moisture from entering the joint between the first scintillator panel and the second scintillator panel, and can reliably protect the multiple columnar crystals having deliquescent properties. Furthermore, even if a difference in expansion and contraction occurs between the sensor panel and the first scintillator panel and between the sensor panel and the second scintillator panel due to temperature change, the joint between the first scintillator panel and the second scintillator panel can be prevented from peeling off from the light receiving surface of the sensor panel.

[0016] In the radiation detector of the present invention, the moisture-proof layer may have a flexible main body layer and an inorganic layer disposed on the main body layer, and the moisture-proof layer may be disposed on the first scintillator panel and the second scintillator panel with the inorganic layer positioned on the first and second scintillator panel sides with respect to the main body layer. This allows the inorganic layer to function as the moisture-proof layer and the main body layer to function as the protective layer.

[0017] The radiation detector of the present invention may further include a sealing member, an outer edge of the moisture proof layer reaching the surface of the sensor panel around the light receiving surface, and the sealing member may seal the outer edge of the moisture proof layer on the surface of the sensor panel in a state in which the area defined by the sensor panel and the moisture proof layer is depressurized. This allows the moisture proof layer to be adhered to the first scintillator panel and the second scintillator panel without using an adhesive layer.

[0018] The radiation detector of the present invention may further include a first moisture-proof layer disposed on the first scintillator panel on the opposite side to the sensor panel, a second moisture-proof layer disposed on the second scintillator panel on the opposite side to the sensor panel, a first protective layer covering the first scintillator panel and the first moisture-proof layer, and a second protective layer covering the second scintillator panel and the second moisture-proof layer, which makes it possible to protect the multiple columnar crystals having deliquescent properties.

[0019] The method for manufacturing a radiation detector of the present invention is a method for manufacturing the radiation detector described above, and includes the steps of preparing a sensor panel, preparing a first scintillator panel and a second scintillator panel, and arranging the first scintillator panel and the second scintillator panel, respectively, on a light receiving surface, wherein in the step of preparing the first scintillator panel and the second scintillator panel, a first angle formed between the surface of the first scintillator panel facing the sensor panel and the side of the first scintillator panel facing the second scintillator panel is 90 degrees or less, and a second angle formed between the surface of the second scintillator panel facing the sensor panel and the side of the second scintillator panel facing the first scintillator panel is 90 degrees or less.

[0020] According to the method for manufacturing a radiation detector of the present invention, the above-mentioned radiation detector can be obtained easily and reliably.

[0021] The scintillator panel unit of the present invention comprises a support layer, and a first scintillator panel and a second scintillator panel arranged on the support layer adjacent to each other along the support layer, the first scintillator panel having a first substrate and a first scintillator layer including a plurality of columnar crystals formed on the first substrate, the second scintillator panel having a second substrate and a second scintillator layer including a plurality of columnar crystals formed on the second substrate, the outer edge of the first substrate when viewed from the first scintillator layer side includes a first portion extending along the second scintillator panel, extends to at least the first portion, the outer edge of the second substrate when viewed from the second scintillator layer side includes a second portion extending along the first scintillator panel, the second scintillator layer extends to at least the second portion, a first angle formed between the surface of the first scintillator panel facing the first scintillator layer and the side of the first scintillator panel facing the second scintillator panel is 90 degrees or less, and a second angle formed between the surface of the second scintillator panel facing the second scintillator layer and the side of the second scintillator panel facing the first scintillator panel is 90 degrees or less.

[0022] According to the scintillator panel unit of the present invention, the first scintillator panel, the second scintillator panel, and the support layer can be handled in an integrated state.

[0023] In the scintillator panel unit of the present invention, the support layer is an adhesive layer, the first scintillator panel is disposed on the adhesive layer with the first scintillator layer positioned on the adhesive layer side relative to the first substrate, the second scintillator panel is disposed on the adhesive layer with the second scintillator layer positioned on the adhesive layer side relative to the second substrate, and the adhesive layer may be continuous across the first and second scintillator panels. This allows the first and second scintillator panels and the adhesive layer to be handled in an integrated state.

[0024] In the scintillator panel unit of the present invention, the support layer is a moisture-proof layer, the first scintillator panel is disposed on the moisture-proof layer with the first substrate positioned on the moisture-proof layer side relative to the first scintillator layer, the second scintillator panel is disposed on the moisture-proof layer with the second substrate positioned on the moisture-proof layer side relative to the second scintillator layer, and the moisture-proof layer may be continuous across the first scintillator panel and the second scintillator panel. This allows the first scintillator panel, the second scintillator panel, and the moisture-proof layer to be handled in an integrated state.

[0025] In the scintillator panel unit of the present invention, the first scintillator panel may further have a first protective layer covering the first substrate and the first scintillator layer, and the second scintillator panel may further have a second protective layer covering the second substrate and the second scintillator layer, thereby protecting the multiple columnar crystals having deliquescent properties.

[0026] The scintillator panel unit of the present invention may further include a first moisture-proof layer disposed on the first scintillator panel on the opposite side to the adhesive layer, a second moisture-proof layer disposed on the second scintillator panel on the opposite side to the adhesive layer, a first protective layer covering the first scintillator panel and the first moisture-proof layer, and a second protective layer covering the second scintillator panel and the second moisture-proof layer, which can protect the multiple columnar crystals having deliquescent properties. Effect of the Invention

[0027] According to the present invention, it is possible to provide a radiation detector that can achieve both an enlarged radiation detection region and high resolution of a radiation image, a method for manufacturing such a radiation detector, and a scintillator panel unit suitable for them. [Brief description of the drawings]

[0028] [Figure 1] 1 is a cross-sectional view of a radiation detector according to an embodiment. [Diagram 2]FIG. 2 is a cross-sectional view of a scintillator panel unit according to one embodiment. [Diagram 3] 4 is a cross-sectional view of a radiation detector during a step of a method for manufacturing a radiation detector according to an embodiment. FIG. [Figure 4] FIG. 11 is a cross-sectional view of a radiation detector according to a modified example. [Diagram 5] FIG. 11 is a cross-sectional view of a portion of a radiation detector according to a modified example. [Figure 6] FIG. 11 is a cross-sectional view of a modified scintillator panel unit. [Figure 7] FIG. 11 is a cross-sectional view of a radiation detector according to a modified example. [Figure 8] FIG. 11 is a cross-sectional view of a radiation detector according to a modified example. [Figure 9] FIG. 11 is a cross-sectional view of a modified scintillator panel unit. [Figure 10] FIG. 11 is a cross-sectional view of a modified scintillator panel unit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals, and duplicated explanations will be omitted. [Radiation detector configuration]

[0030] 1, the radiation detector 1 includes a sensor panel 2, a first scintillator panel 10, a second scintillator panel 20, an adhesive layer 3, a granular phosphor 4, a moisture-proof layer 5, an adhesive layer 6, and a sealing member 7. In the radiation detector 1, when radiation (e.g., X-rays) is incident on the first scintillator panel 10 and the second scintillator panel 20, scintillation light is generated in the first scintillator panel 10 and the second scintillator panel 20, and the scintillation light is detected by the sensor panel. The radiation detector 1 is used as a radiation imaging device, for example, in a medical radiation image diagnostic device or a non-destructive testing device.

[0031] The sensor panel 2 includes a plurality of photoelectric conversion elements (not shown) arranged along the light receiving surface 2a. Each photoelectric conversion element constitutes a pixel, and outputs an electrical signal according to the incident scintillation light. The light receiving surface 2a is provided on one of the main surfaces of the sensor panel 2. The main surface is provided with a surface 2b, which is a frame-shaped area surrounding the light receiving surface 2a. The sensor panel 2 is flexible. The material of the substrate on which the plurality of photoelectric conversion elements are provided in the sensor panel 2 is, for example, PI (polyimide), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PP (polypropylene), PE (polyester), or PMMA (polymethyl methacrylate).

[0032] The first scintillator panel 10 and the second scintillator panel 20 are disposed on the light receiving surface 2a in a state adjacent to each other along the light receiving surface 2a. The first scintillator panel 10 has a first substrate 11, a first scintillator layer 12, and a first protective layer 13. The second scintillator panel 20 has a second substrate 21, a second scintillator layer 22, and a second protective layer 23.

[0033] The first substrate 11 and the second substrate 21 each have flexibility. The material of the first substrate 11 and the second substrate 21 is, for example, PET, PEN, PI, PP, PE, or PMMA. The thickness of the first substrate 11 and the second substrate 21 is, for example, 50 μm or more and 250 μm or less. A functional film may be formed on the front and back surfaces of the first substrate 11 and the second substrate 21. The functional film may be, for example, an easy-adhesion coat, an antistatic coat, or a moisture-proof film (polyparaxylylene film). The functional film may be a laminated film including a plurality of films each having different functions.

[0034] The first scintillator layer 12 includes a plurality of columnar crystals formed on the first substrate 11. The second scintillator layer 22 includes a plurality of columnar crystals formed on the second substrate 21. The plurality of columnar crystals are formed on the first substrate 11 or the second substrate 21, for example, by evaporating a scintillator material on the first substrate 11 or the second substrate 21. The material of each of the first scintillator layer 12 and the second scintillator layer 22 is, for example, CsI:Tl (cesium iodide containing thallium as an activator), CsI:Na (cesium iodide containing sodium as an activator), CsI:Ce (cesium iodide containing cerium as an activator), or CsI:Tl,Eu (cesium iodide containing thallium and europium as activators). The thickness of each of the first scintillator layer 12 and the second scintillator layer 22 is, for example, not less than 100 μm and not more than 1000 μm (preferably not less than 400 μm and not more than 800 μm).

[0035] The first protective layer 13 covers the first substrate 11 and the first scintillator layer 12. The second protective layer 23 covers the second substrate 21 and the second scintillator layer 22. The material of each of the first protective layer 13 and the second protective layer 23 is, for example, parylene (polyparaxylylene). The thickness of each of the first protective layer 13 and the second protective layer 23 is, for example, 0.5 μm or more and 20 μm or less.

[0036] The first scintillator panel 10 is disposed on the light receiving surface 2a with the first scintillator layer 12 located on the light receiving surface 2a side relative to the first substrate 11. The first scintillator panel 10 has a rectangular shape with one side having a length of 300 mm or more when viewed from the thickness direction of the first substrate 11. The second scintillator panel 20 is disposed on the light receiving surface 2a with the second scintillator layer 22 located on the light receiving surface 2a side relative to the second substrate 21. The second scintillator panel 20 has a rectangular shape with one side having a length of 300 mm or more when viewed from the thickness direction of the second substrate 21.

[0037] The outer edge 11a of the first substrate 11 when viewed from the first scintillator layer 12 side includes a first portion 11b extending along the second scintillator panel 20. The first scintillator layer 12 reaches the first portion 11b. In this embodiment, the first scintillator layer 12 reaches the entire outer edge 11a. The outer edge 21a of the second substrate 21 when viewed from the second scintillator layer 22 side includes a second portion 21b extending along the first scintillator panel 10. The second scintillator layer 22 reaches the second portion 21b. In this embodiment, the second scintillator layer 22 reaches the entire outer edge 21a. The first portion 11b of the outer edge 11a of the first substrate 11 and the second portion 21b of the outer edge 21a of the second substrate 21 face each other.

[0038] The first substrate 11 and the first scintillator layer 12 are obtained by forming a scintillator layer including a portion corresponding to the first scintillator layers 12 on a substrate including a portion corresponding to the first substrates 11, and then cutting the substrate and the scintillator layer. The second substrate 21 and the second scintillator layer 22 are obtained by forming a scintillator layer including a portion corresponding to the second scintillator layers 22 on a substrate including a portion corresponding to the second substrates 21, and then cutting the substrate and the scintillator layer. The first substrate 11 and the first scintillator layer 12 may be obtained by forming a scintillator layer including a portion corresponding to one first scintillator layer 12 on a substrate including a portion corresponding to one first substrate 11, and then cutting the substrate and the scintillator layer. The second substrate 21 and the second scintillator layer 22 may be obtained by forming a scintillator layer including a portion corresponding to one second scintillator layer 22 on a substrate including a portion corresponding to one second substrate 21, and then cutting out the substrate and the scintillator layer.

[0039] A first angle θ1 between a surface 10a on the sensor panel 2 side (the first scintillator layer 12 side with respect to the first substrate 11) of the first scintillator panel 10 and a side surface 10b on the second scintillator panel 20 side of the first scintillator panel 10 is 45 degrees or more and less than 90 degrees. In this embodiment, the surface 10a and all side surfaces of the first scintillator panel 10 form an angle of 45 degrees or more and less than 90 degrees. A second angle θ2 between a surface 20a on the sensor panel 2 side (the second scintillator layer 22 side with respect to the second substrate 21) of the second scintillator panel 20 and a side surface 20b on the first scintillator panel 10 side of the second scintillator panel 20 is 45 degrees or more and less than 90 degrees. In this embodiment, the surface 20a and all side surfaces of the second scintillator panel 20 form an angle of 45 degrees or more and less than 90 degrees. A corner of the first scintillator panel 10 formed by the front surface 10a and the side surface 10b contacts a corner of the second scintillator panel 20 formed by the front surface 20a and the side surface 20b.

[0040] The adhesive layer 3 is disposed between the light receiving surface 2a and the first scintillator panel 10 and between the light receiving surface 2a and the second scintillator panel 20. The first scintillator panel 10 is adhered to the light receiving surface 2a by the adhesive layer 3 with the first scintillator layer 12 positioned on the light receiving surface 2a side with respect to the first substrate 11. The second scintillator panel 20 is adhered to the light receiving surface 2a by the adhesive layer 3 with the second scintillator layer 22 positioned on the light receiving surface 2a side with respect to the second substrate 21. The adhesive layer 3 is continuous across the first scintillator panel 10 and the second scintillator panel 20. That is, the adhesive layer 3 is not separated for each of the first scintillator panel 10 and the second scintillator panel 20, but is formed integrally.

[0041] The adhesive layer 3 is a pressure-sensitive adhesive or an adhesive. The pressure-sensitive adhesive means a material that does not harden after adhesion. The adhesive means a material that hardens after adhesion. The material of the adhesive layer 3 is, for example, a light-transmitting organic material (for example, OCA (Optical Clear Adhesive)). The thickness of the adhesive layer 3 is, for example, 0.1 μm or more and 100 μm or less (preferably 25 μm or less).

[0042] The granular phosphor 4 is disposed between the first scintillator panel 10 and the second scintillator panel 20. More specifically, the granular phosphor 4 is disposed in a groove having a V-shaped cross section formed by the side surface 10b of the first scintillator panel 10 and the side surface 20b of the second scintillator panel 20. The material of the granular phosphor 4 is, for example, GOS (gadolinium oxysulfide).

[0043] The moisture-proof layer 5 covers the first scintillator panel 10 and the second scintillator panel 20 on the sensor panel 2. The moisture-proof layer 5 is disposed on the first scintillator panel 10 and the second scintillator panel 20 on the side opposite to the sensor panel 2, and is continuous across the first scintillator panel 10 and the second scintillator panel 20. An outer edge 5a of the moisture-proof layer 5 reaches the surface 2b of the sensor panel 2 (the surface surrounding the light-receiving surface 2a).

[0044] The moisture-proof layer 5 has a main body layer 51 and an inorganic layer 52. The main body layer 51 is flexible. The inorganic layer 52 is disposed on the main body layer 51. The inorganic layer 52 is integrated with the main body layer 51, for example, by being adhered to the main body layer 51. The moisture-proof layer 5 is disposed on the first scintillator panel 10 and the second scintillator panel 20 with the inorganic layer 52 positioned on the first scintillator panel 10 and the second scintillator panel 20 side with respect to the main body layer 51.

[0045] The material of the main body layer 51 is, for example, PET, PEN, PI, PP, PE, or PMMA. The thickness of the main body layer 51 is, for example, 50 μm or more and 250 μm or less. The material of the inorganic layer 52 is, for example, Al (aluminum), Cu (copper), Ti (titanium), Fe (iron), or SUS (stainless steel). The thickness of the inorganic layer 52 is, for example, 10 μm or more and 100 μm or less.

[0046] The adhesive layer 6 is disposed between the first scintillator panel 10 and the moisture-proof layer 5, between the second scintillator panel 20 and the moisture-proof layer 5, and between the surface 2b of the sensor panel 2 and the moisture-proof layer 5. The moisture-proof layer 5 is adhered to the first scintillator panel 10, the second scintillator panel 20, and the surface 2b of the sensor panel 2. The adhesive layer 6 is a pressure-sensitive adhesive or adhesive. The thickness of the adhesive layer 6 is, for example, 0.1 μm or more and 100 μm or less (preferably 25 μm or less).

[0047] The sealing member 7 seals the outer edge 5a of the moisture-proof layer 5 on the surface 2b of the sensor panel 2. The sealing member 7 extends in a frame shape along the outer edge 5a. The material of the sealing member 7 is, for example, epoxy, silicone, fluorine, urethane, or acrylic. The material of the sealing member 7 may contain a filler material made of an inorganic material such as glass. The material of the filler material may have a moisture-proof property higher than that of the main material of the sealing member 7, and is, for example, SiO2 (silicon dioxide), Al2O3 (aluminum oxide), or TiO2 (titanium oxide).

[0048] As described above, in the radiation detector 1, the first scintillator panel 10 and the second scintillator panel 20 are disposed on the light receiving surface 2a of the sensor panel 2 in a state adjacent to each other along the light receiving surface 2a of the sensor panel 2. In the first scintillator panel 10 and the second scintillator panel 20, the first scintillator layer 12 reaches a first portion 11b of the outer edge 11a of the first substrate 11 that extends along the second scintillator panel 20, and the second scintillator layer 22 reaches a second portion 21b of the outer edge 21a of the second substrate 21 that extends along the first scintillator panel 10. Therefore, while each of the first scintillator panel 10 and the second scintillator panel 20 is configured to have a size that can reliably form a plurality of columnar crystals, one radiation detection region can be obtained by the first scintillator panel 10 and the second scintillator panel 20. Moreover, the first angle θ1 between the surface 10a of the first scintillator panel 10 facing the sensor panel 2 and the side surface 10b of the first scintillator panel 10 facing the second scintillator panel 20 is 90 degrees or less, and the second angle θ2 between the surface 20a of the second scintillator panel 20 facing the sensor panel 2 and the side surface 20b of the second scintillator panel 20 facing the first scintillator panel 10 is 90 degrees or less. This makes it possible to prevent the joint portion between the first scintillator panel 10 and the second scintillator panel 20 from peeling off from the light receiving surface 2a due to thermal expansion of air at the joint portion. Furthermore, since the first scintillator layer 12 and the second scintillator layer 22 are brought closer to each other, it is possible to suppress deterioration of the image quality of the radiation image at the joint portion between the first scintillator panel 10 and the second scintillator panel 20. As described above, the radiation detector 1 can achieve both a large radiation detection region and high resolution of the radiation image.

[0049] In the radiation detector 1, the first angle θ1 and the second angle θ2 are each equal to or greater than 45 degrees and less than 90 degrees. This makes it possible to more reliably prevent the joint portion between the first scintillator panel 10 and the second scintillator panel 20 from peeling off from the light receiving surface 2a due to thermal expansion of air at the joint portion.

[0050] In the radiation detector 1, the first substrate 11 and the second substrate 21 are each flexible. This can improve the workability when bonding the first scintillator panel 10 and the second scintillator panel 20 to the light receiving surface 2a.

[0051] In the radiation detector 1, the first angle θ1 and the second angle θ2 are each less than 90 degrees, and the sensor panel 2 is flexible. This allows the entire radiation detector 1 to bend in accordance with the installation environment of the radiation detector 1, etc. Furthermore, when the entire radiation detector 1 is bent so that the sensor panel 2 is on the outer side relative to the first scintillator panel 10 and the second scintillator panel 20, physical interference between the first scintillator panel 10 and the second scintillator panel 20 can be prevented.

[0052] As an example, as shown in Fig. 4, the entire radiation detector 1 can be bent so that the first scintillator panel 10 and the second scintillator panel 20 are arranged along the cylindrical surface S. At this time, since the first angle θ1 and the second angle θ2 are each less than 90 degrees, it is possible to prevent physical interference between the first scintillator panel 10 and the second scintillator panel 20. Note that although the radiation detector 1 shown in Fig. 4 does not include the granular phosphor 4, the moisture-proof layer 5, the adhesive layer 6, and the sealing member 7, they may be included as necessary.

[0053] In the radiation detector 1, an adhesive layer 3 is disposed between the light receiving surface 2a and the first scintillator panel 10 and between the light receiving surface 2a and the second scintillator panel 20, and each of the first scintillator panel 10 and the second scintillator panel 20 is adhered to the light receiving surface 2a by the adhesive layer 3. This allows each of the first scintillator panel 10 and the second scintillator panel 20 to be reliably disposed on the light receiving surface 2a.

[0054] In the radiation detector 1, the adhesive layer 3 contains a pressure sensitive adhesive or a bonding agent, which allows the first scintillator panel 10 and the second scintillator panel 20 to be reliably bonded to the light receiving surface 2a.

[0055] In the radiation detector 1, the first scintillator panel 10 has a first protective layer 13 that covers the first substrate 11 and the first scintillator layer 12, and the second scintillator panel 20 has a second protective layer 23 that covers the second substrate 21 and the second scintillator layer 22. This makes it possible to more reliably protect the multiple columnar crystals having deliquescent properties.

[0056] In the radiation detector 1, the granular phosphor 4 is disposed between the first scintillator panel 10 and the second scintillator panel 20. This makes it possible to suppress deterioration of the image quality of a radiation image at the joint between the first scintillator panel 10 and the second scintillator panel 20.

[0057] In the radiation detector 1, a moisture-proof layer 5 is disposed on the first scintillator panel 10 and the second scintillator panel 20 on the side opposite to the sensor panel 2, and the moisture-proof layer 5 is continuous across the first scintillator panel 10 and the second scintillator panel 20. This makes it possible to prevent moisture from penetrating into the joint portion between the first scintillator panel 10 and the second scintillator panel 20, and to reliably protect a plurality of deliquescent columnar crystals. Furthermore, even if a difference in expansion and contraction occurs between the sensor panel 2 and the first scintillator panel 10 and between the sensor panel 2 and the second scintillator panel 20 due to a temperature change, it is possible to prevent the joint portion between the first scintillator panel 10 and the second scintillator panel 20 from peeling off from the light-receiving surface 2a.

[0058] In the radiation detector 1, the moisture-proof layer 5 has a flexible main body layer 51 and an inorganic layer 52 disposed on the main body layer 51, and the moisture-proof layer 5 is disposed on the first scintillator panel 10 and the second scintillator panel 20 with the inorganic layer 52 positioned on the first scintillator panel 10 and the second scintillator panel 20 side with respect to the main body layer 51. This allows the inorganic layer 52 to function as the moisture-proof layer 5 and the main body layer 51 to function as a protective layer.

[0059] In the radiation detector 1, the adhesive layer 3 disposed between the light receiving surface 2a and the first scintillator panel 10 and between the light receiving surface 2a and the second scintillator panel 20 is continuous across the first scintillator panel 10 and the second scintillator panel 20. This makes it possible to prevent each of the first scintillator panel 10 and the second scintillator panel 20 from peeling off from the light receiving surface 2a.

[0060] In the radiation detector 1, the first scintillator panel 10 has a rectangular shape with one side measuring 300 mm or more when viewed in the thickness direction of the first substrate 11, and the second scintillator panel 20 has a rectangular shape with one side measuring 300 mm or more when viewed in the thickness direction of the second substrate 21. This makes it possible to easily and reliably increase the area of ​​the radiation detection region. [Scintillator panel unit configuration]

[0061] 2, the scintillator panel unit 100 includes a first scintillator panel 10, a second scintillator panel 20, an adhesive layer 3, and a release sheet 8. The scintillator panel unit 100 is used, for example, when manufacturing the radiation detector 1 described above.

[0062] The first scintillator panel 10 and the second scintillator panel 20 are disposed on an adhesive layer 3 serving as a support layer, adjacent to each other along the adhesive layer 3. The adhesive layer 3 is continuous across the first scintillator panel 10 and the second scintillator panel 20. A release sheet 8 covers the adhesive layer 3 from the side opposite the first scintillator panel 10 and the second scintillator panel 20. The adhesive strength of the adhesive layer 3 to a surface 8a of the release sheet 8 is lower than the adhesive strength of the adhesive layer 3 to the first scintillator panel 10 and the second scintillator panel 20. In the scintillator panel unit 100, the adhesive layer 3 is an adhesive layer.

[0063] The first scintillator panel 10 is disposed on the adhesive layer 3 with the first scintillator layer 12 positioned on the adhesive layer 3 side with respect to the first substrate 11. The second scintillator panel 20 is disposed on the adhesive layer 3 with the second scintillator layer 22 positioned on the adhesive layer 3 side with respect to the second substrate 21. In other words, the manner in which the first scintillator panel 10 and the second scintillator panel 20 are disposed on the adhesive layer 3 of the scintillator panel unit 100 is similar to the manner in which the first scintillator panel 10 and the second scintillator panel 20 are disposed on the adhesive layer 3 of the radiation detector 1 described above.

[0064] According to the above-described scintillator panel unit 100, the first scintillator panel 10, the second scintillator panel 20, and the adhesive layer 3 can be handled in an integrated state.

[0065] In the scintillator panel unit 100, the first scintillator panel 10 has a first protective layer 13 that covers the first substrate 11 and the first scintillator layer 12, and the second scintillator panel 20 has a second protective layer 23 that covers the second substrate 21 and the second scintillator layer 22. This makes it possible to protect the multiple columnar crystals having deliquescent properties. [Radiation detector manufacturing method]

[0066] A description will now be given of a method for manufacturing the above-mentioned radiation detector 1. In this embodiment, the above-mentioned scintillator panel unit 100 is used.

[0067] First, the sensor panel 2 is prepared (a step of preparing the sensor panel 2). Next, in the state of the scintillator panel unit 100 shown in Fig. 2, the first scintillator panel 10 and the second scintillator panel 20 are prepared (a step of preparing the first scintillator panel 10 and the second scintillator panel 20). In the step of preparing the first scintillator panel 10 and the second scintillator panel 20, the first angle θ1 and the second angle θ2 are each equal to or greater than 45 degrees and less than 90 degrees (see Fig. 1). Note that, regarding the step of preparing the sensor panel 2 and the step of preparing the first scintillator panel 10 and the second scintillator panel 20, either step may be performed first, or both steps may be performed simultaneously.

[0068] Next, the release sheet 8 is peeled off from the adhesive layer 3 of the scintillator panel unit 100, and as shown in Fig. 3, the first scintillator panel 10 and the second scintillator panel 20 are each adhered to the light receiving surface 2a by the adhesive layer 3 (adhering step). That is, the first scintillator panel 10 and the second scintillator panel 20 are each arranged on the light receiving surface 2a (arranging the first scintillator panel 10 and the second scintillator panel 20). In the adhering step, the adhesive layer 3 is continuous across the first scintillator panel 10 and the second scintillator panel 20. In the adhering step, the adhesive layer 3 is arranged on each of the first scintillator panel 10 and the second scintillator panel 20 before each of the first scintillator panel 10 and the second scintillator panel 20 is adhered to the light receiving surface 2a.

[0069] In the bonding step, because the first substrate 11 and the second substrate 21 are each flexible, the first scintillator panel 10 and the second scintillator panel 20 can each be gradually bonded to the light-receiving surface 2a from one side while bending the first scintillator panel 10 and the second scintillator panel 20. At this time, the corners of the first scintillator panel 10 formed by the surface 10a and the side surface 10b can be reliably brought into contact with the corners of the second scintillator panel 20 formed by the surface 20a and the side surface 20b.

[0070] 1, the first scintillator panel 10 and the second scintillator panel 20 are covered with a moisture-proof layer 5 on the sensor panel 2. That is, the moisture-proof layer 5 is disposed on the first scintillator panel 10 and the second scintillator panel 20 on the side opposite to the sensor panel 2 (step of disposing the moisture-proof layer 5). In the step of disposing the moisture-proof layer 5, the moisture-proof layer 5 is continuous across the first scintillator panel 10 and the second scintillator panel 20. Next, on the surface 2b of the sensor panel 2, the outer edge 5a of the moisture-proof layer 5 is sealed with the sealing member 7, and the radiation detector 1 is obtained. In this embodiment, the step of disposing each of the first scintillator panel 10 and the second scintillator panel 20 is performed before the step of disposing the moisture-proof layer 5.

[0071] According to the above method for manufacturing the radiation detector 1, the above-mentioned radiation detector 1 can be obtained easily and reliably.

[0072] In the manufacturing method of the radiation detector 1, in the bonding step, before each of the first scintillator panel 10 and the second scintillator panel 20 is bonded to the light receiving surface 2a, the adhesive layer 3 is disposed on each of the first scintillator panel 10 and the second scintillator panel 20. This allows the first scintillator panel 10, the second scintillator panel 20, and the adhesive layer 3 to be handled in an integrated state.

[0073] In the method for manufacturing the radiation detector 1, the steps of arranging the first scintillator panel 10 and the second scintillator panel 20 are performed before the step of arranging the moisture-proof layer 5. This allows the sensor panel 2 and the first and second scintillator panels 10 and 20 to be handled in an integrated state when the moisture-proof layer 5 is arranged on the first and second scintillator panels 10 and 20 on the side opposite the sensor panel 2. [Variations]

[0074] The present invention is not limited to the above-described embodiment. In the radiation detector 1, the first angle θ1 and the second angle θ2 may each be 90 degrees as shown in Fig. 5. That is, in the radiation detector 1, it is sufficient that the first angle θ1 and the second angle θ2 are each 90 degrees or less. This also applies to the above-described scintillator panel unit 100 and the method for manufacturing the radiation detector 1.

[0075] As shown in Fig. 6, the scintillator panel unit 100 may include a moisture-proof layer 5 as a support layer, and a first scintillator panel 10 and a second scintillator panel 20 arranged on the moisture-proof layer 5 in a state adjacent to each other along the moisture-proof layer 5. The configuration of the scintillator panel unit 100 shown in Fig. 6 is as follows. That is, the moisture-proof layer 5 is continuous across the first scintillator panel 10 and the second scintillator panel 20. The first scintillator panel 10 is arranged on the moisture-proof layer 5 in a state in which the first substrate 11 is located on the moisture-proof layer 5 side with respect to the first scintillator layer 12. The second scintillator panel 20 is arranged on the moisture-proof layer 5 in a state in which the second substrate 21 is located on the moisture-proof layer 5 side with respect to the second scintillator layer 22.

[0076] In the scintillator panel unit 100 shown in FIG. 6, the moisture-proof layer 5 covers the first scintillator panel 10 and the second scintillator panel 20, and an adhesive layer 6 is disposed between the first scintillator panel 10 and the moisture-proof layer 5 and between the second scintillator panel 20 and the moisture-proof layer 5. Furthermore, an adhesive layer 3 is disposed between the first scintillator panel 10 and the release sheet 8 and between the second scintillator panel 20 and the release sheet 8, and an adhesive layer 6 is disposed between the outer edge 5a of the moisture-proof layer 5 and the release sheet 8. The adhesive layer 3 and the adhesive layer 6 are each a pressure-sensitive adhesive layer. The adhesive strength of the adhesive layer 3 to the surface 8a of the release sheet 8 is lower than the adhesive strength of the adhesive layer 3 to the first scintillator panel 10 and the second scintillator panel 20. The adhesive strength of the adhesive layer 6 to the surface 8a of the release sheet 8 is lower than the adhesive strength of the adhesive layer 6 to the outer edge 5a of the moisture-proof layer 5. 6, the first scintillator panel 10, the second scintillator panel 20, and the moisture-proof layer 5 can be handled in an integrated state. Note that the scintillator panel unit 100 shown in FIG 6 does not necessarily have to include the adhesive layer 3, the portion of the adhesive layer 6 that is disposed on the outer edge 5a, and the release sheet 8.

[0077] As shown in Figure 7, in the radiation detector 1, the outer edge of the moisture-proof layer 5 may be located on the first scintillator panel 10 and the second scintillator panel 20, and the sealing member 7 may seal the outer side surfaces of the first scintillator panel 10 and the second scintillator panel 20, as well as the outer side surface of the moisture-proof layer 5, on the surface 2b of the sensor panel 2.

[0078] As shown in FIG. 8, in the radiation detector 1, the first moisture-proof layer 5A may be disposed on the first scintillator panel 10 on the side opposite to the sensor panel 2, and the second moisture-proof layer 5B may be disposed on the second scintillator panel 20 on the side opposite to the sensor panel 2. In that case, the first protective layer 13 may cover the first scintillator panel 10 and the first moisture-proof layer 5A, and the second protective layer 23 may cover the second scintillator panel 20 and the second moisture-proof layer 5B. The configurations of the first moisture-proof layer 5A and the second moisture-proof layer 5B are the same as the configuration of the moisture-proof layer 5 described above. In the radiation detector 1 shown in FIG. 8, the sealing member 7 seals the outer side surfaces of the first scintillator panel 10 and the second scintillator panel 20, and the outer side surfaces of the first moisture-proof layer 5A and the second moisture-proof layer 5B on the surface 2b of the sensor panel 2. According to the radiation detector 1 shown in FIG. 8, a plurality of columnar crystals having deliquescent properties can be protected.

[0079] 9, in the scintillator panel unit 100, the outer edge of the moisture-proof layer 5 may be located on the first scintillator panel 10 and the second scintillator panel 20. It is noted that the scintillator panel unit 100 shown in FIG. 9 does not necessarily have to include the adhesive layer 3 and the release sheet 8.

[0080] As shown in Fig. 10, in the scintillator panel unit 100, the first moisture-proof layer 5A may be disposed on the first scintillator panel 10 on the side opposite to the adhesive layer 3, and the second moisture-proof layer 5B may be disposed on the second scintillator panel 20 on the side opposite to the adhesive layer 3. In that case, the first protective layer 13 may cover the first scintillator panel 10 and the first moisture-proof layer 5A, and the second protective layer 23 may cover the second scintillator panel 20 and the second moisture-proof layer 5B. The configurations of the first moisture-proof layer 5A and the second moisture-proof layer 5B are the same as the configuration of the moisture-proof layer 5 described above. According to the scintillator panel unit 100 shown in Fig. 10, a plurality of columnar crystals having deliquescent properties can be protected.

[0081] In the radiation detector 1 and the scintillator panel unit 100, the first substrate 11 and the second substrate 21 may not be flexible. In that case, the material of each of the first substrate 11 and the second substrate 21 may be, for example, CFRP (carbon fiber reinforced plastic), aC (amorphous carbon), Al, Cu, or glass. When the material of each of the first substrate 11 and the second substrate 21 is metal, a functional film (such as a polyparaxylylene film) may be formed on the front and back surfaces of each of the first substrate 11 and the second substrate 21 as, for example, a corrosion-resistant coating. The functional film may be a laminated film including a plurality of films each having different functions. As an example, when the material of each of the first substrate 11 and the second substrate 21 is Al, an alumite (anodic alumina) film and a polyparaxylylene film may be formed on the front and back surfaces of each of the first substrate 11 and the second substrate 21. In the radiation detector 1 and the scintillator panel unit 100, the first substrate 11 and the second substrate 21 may each be a laminated substrate including a plurality of substrates (for example, a CFRP substrate and a PET substrate).

[0082] In the radiation detector 1 and the scintillator panel unit 100, the first scintillator layer 12 may extend to at least a first portion 11b of the outer edge 11a of the first substrate 11. Similarly, the second scintillator layer 22 may extend to at least a second portion 21b of the outer edge 11a of the second substrate 21. In the radiation detector 1 and the scintillator panel unit 100, the first substrate 11 and the first scintillator layer 12 are not limited to those obtained by cutting or cutting out, and the first scintillator layer 12 may extend to the side surface of the first substrate 11. Similarly, the second substrate 21 and the second scintillator layer 22 are not limited to those obtained by cutting or cutting out, and the second scintillator layer 22 may extend to the side surface of the second substrate 21.

[0083] In the radiation detector 1, the sensor panel 2 may not be flexible. In that case, the material of the substrate on which the multiple photoelectric conversion elements are provided in the sensor panel 2 may be, for example, a-Si (amorphous silicon), Si (silicon), or glass (for example, non-alkali glass). In the radiation detector 1, the outer edge 5a of the moisture-proof layer 5 may reach the surface 2b of the sensor panel 2 around the light-receiving surface 2a, and the sealing member 7 may seal the outer edge 5a of the moisture-proof layer 5 on the surface 2b of the sensor panel 2 in a state in which the area defined by the sensor panel 2 and the moisture-proof layer 5 is depressurized. In that case, the moisture-proof layer 5 can be adhered to the first scintillator panel 10 and the second scintillator panel 20 without using the adhesive layer 3. In the radiation detector 1, the moisture-proof layer 5 formed in a hat shape may cover the first scintillator panel 10 and the second scintillator panel 20 in the sensor panel 2, and the sealing member 7 may seal the outer edge 5a of the moisture-proof layer 5 on the surface 2b of the sensor panel 2.

[0084] The radiation detector 1 and the scintillator panel unit 100 may not include the moisture-proof layers 5, 5A, 5B. The radiation detector 1 and the scintillator panel unit 100 may not include the first protective layer 13 and the second protective layer .

[0085] In the manufacturing method of the radiation detector 1, in the bonding step, the adhesive layer 3 may be disposed on the light-receiving surface 2a before each of the first scintillator panel 10 and the second scintillator panel 20 is bonded to the light-receiving surface 2a. In that case, each of the first scintillator panel 10 and the second scintillator panel 20 can be handled individually. In the manufacturing method of the radiation detector 1, the step of disposing the moisture-proof layer 5 may be performed before the step of disposing each of the first scintillator panel 10 and the second scintillator panel 20. In that case, when disposing each of the first scintillator panel 10 and the second scintillator panel 20 on the light-receiving surface 2a, the first scintillator panel 10 and the second scintillator panel 20 and the moisture-proof layer 5 can be handled in an integrated state.

[0086] All of the embodiments and modifications of the radiation detector 1, the scintillator panel unit 100, and the manufacturing method for the radiation detector 1 described above may include a first scintillator panel 10 and a second scintillator panel 20 as a plurality of scintillator panels arranged one-dimensionally or two-dimensionally. For example, when three scintillator panels are arranged one-dimensionally, any "two adjacent scintillator panels" can be regarded as the first scintillator panel 10 and the second scintillator panel 20. Also, when four scintillator panels are arranged two-dimensionally, any "two adjacent scintillator panels" can be regarded as the first scintillator panel 10 and the second scintillator panel 20. [Explanation of symbols]

[0087] 1...radiation detector, 2...sensor panel, 2a...light-receiving surface, 2b...surface, 3...adhesive layer, 4...granular phosphor, 5...moisture-proof layer, 5a...outer edge, 5A...first moisture-proof layer, 5B...second moisture-proof layer, 7...sealing member, 10...first scintillator panel, 10a...surface, 10b...side, 11...first substrate, 11a...outer edge, 11b...first portion, 12...first scintillator layer, 13...first protective layer, 20...second scintillator panel, 20a...surface, 20b...side, 21...second substrate, 21a...outer edge, 21b...second portion, 22...second scintillator layer, 23...second protective layer, 51...main body layer, 52...inorganic layer, 100...scintillator panel unit, θ1...first angle, θ2...second angle.

Claims

1. a sensor panel having a light receiving surface; a first scintillator panel and a second scintillator panel arranged adjacent to each other along the light receiving surface, the first scintillator panel has a first substrate and a first scintillator layer including a plurality of columnar crystals formed on the first substrate; the second scintillator panel has a second substrate and a second scintillator layer including a plurality of columnar crystals formed on the second substrate; the first scintillator panel is disposed on the light receiving surface with the first scintillator layer positioned on the light receiving surface side with respect to the first substrate, the second scintillator panel is disposed on the light receiving surface with the second scintillator layer positioned on the light receiving surface side with respect to the second substrate, an outer edge of the first substrate when viewed from the first scintillator layer side includes a first portion extending along the second scintillator panel, and the first scintillator layer reaches at least the first portion; an outer edge of the second substrate when viewed from the second scintillator layer side includes a second portion extending along the first scintillator panel, and the second scintillator layer reaches at least the second portion; a first angle between a surface of the first scintillator panel facing the sensor panel and a side surface of the first scintillator panel facing the second scintillator panel is equal to or greater than 45 degrees and smaller than 90 degrees; a second angle formed between a surface of the second scintillator panel facing the sensor panel and a side surface of the second scintillator panel facing the first scintillator panel is equal to or greater than 45 degrees and smaller than 90 degrees.

2. A sensor panel having a light receiving surface; a first scintillator panel and a second scintillator panel arranged adjacent to each other along the light receiving surface, the first scintillator panel has a first substrate and a first scintillator layer including a plurality of columnar crystals formed on the first substrate; the second scintillator panel has a second substrate and a second scintillator layer including a plurality of columnar crystals formed on the second substrate; the first scintillator panel is disposed on the light receiving surface with the first scintillator layer positioned on the light receiving surface side with respect to the first substrate, the second scintillator panel is disposed on the light receiving surface with the second scintillator layer positioned on the light receiving surface side with respect to the second substrate, an outer edge of the first substrate when viewed from the first scintillator layer side includes a first portion extending along the second scintillator panel, and the first scintillator layer reaches at least the first portion; an outer edge of the second substrate when viewed from the second scintillator layer side includes a second portion extending along the first scintillator panel, and the second scintillator layer reaches at least the second portion; a first angle formed between a surface of the first scintillator panel facing the sensor panel and a side surface of the first scintillator panel facing the second scintillator panel is less than 90 degrees; a second angle formed between a surface of the second scintillator panel facing the sensor panel and a side surface of the second scintillator panel facing the first scintillator panel is less than 90 degrees; The radiation detector, wherein the first substrate, the second substrate, and the sensor panel are each flexible.

3. The radiation detector of claim 2 , wherein the first angle and the second angle are each greater than or equal to 45 degrees.

4. The radiation detector according to claim 1 , wherein the first substrate and the second substrate are each flexible.

5. The radiation detector according to claim 1 , wherein the sensor panel is flexible.

6. an adhesive layer disposed between the light receiving surface and the first scintillator panel and between the light receiving surface and the second scintillator panel; 6. The radiation detector according to claim 1, wherein each of the first scintillator panel and the second scintillator panel is adhered to the light receiving surface by the adhesive layer.

7. The radiation detector of claim 6 , wherein the adhesive layer comprises a pressure sensitive adhesive or a bonding agent.

8. the first scintillator panel further includes a first protective layer covering the first substrate and the first scintillator layer; The radiation detector according to claim 1 , wherein the second scintillator panel further comprises a second protective layer covering the second substrate and the second scintillator layer.

9. 9. The radiation detector according to claim 1, further comprising a granular phosphor disposed between the first scintillator panel and the second scintillator panel.

10. a moisture-proof layer disposed on the first scintillator panel and the second scintillator panel on a side opposite to the sensor panel; 10. The radiation detector according to claim 1, wherein the moisture-proof layer is continuous across the first scintillator panel and the second scintillator panel.

11. The moisture-proof layer is A flexible body layer; an inorganic layer disposed on the body layer; The radiation detector according to claim 10 , wherein the moisture-proof layer is disposed on the first scintillator panel and the second scintillator panel with the inorganic layer positioned on the first scintillator panel and the second scintillator panel side relative to the main body layer.

12. Further comprising a sealing member, an outer edge of the moisture-proof layer extends to a surface of the sensor panel around the light-receiving surface; 12. The radiation detector according to claim 10, wherein the sealing member seals the outer edge of the moisture-proof layer on the surface of the sensor panel when an area defined by the sensor panel and the moisture-proof layer is depressurized.

13. a first moisture-proof layer disposed on the first scintillator panel on a side opposite to the sensor panel; a second moisture-proof layer disposed on the second scintillator panel on a side opposite to the sensor panel; a first protective layer covering the first scintillator panel and the first moisture-proof layer; The radiation detector according to claim 1 , further comprising: a second protective layer covering the second scintillator panel and the second moisture-proof layer.

14. A method for manufacturing a radiation detector according to any one of claims 1 to 13, comprising the steps of: providing the sensor panel; providing the first scintillator panel and the second scintillator panel; and disposing the first scintillator panel and the second scintillator panel on the light receiving surface.

15. The support base and a first scintillator panel and a second scintillator panel disposed adjacent to each other along the support layer, the first scintillator panel has a first substrate and a first scintillator layer including a plurality of columnar crystals formed on the first substrate; the second scintillator panel has a second substrate and a second scintillator layer including a plurality of columnar crystals formed on the second substrate; an outer edge of the first substrate when viewed from the first scintillator layer side includes a first portion extending along the second scintillator panel, and the first scintillator layer reaches at least the first portion; an outer edge of the second substrate when viewed from the second scintillator layer side includes a second portion extending along the first scintillator panel, and the second scintillator layer reaches at least the second portion; a first angle formed between a surface of the first scintillator panel facing the first scintillator layer and a side surface of the first scintillator panel facing the second scintillator panel is equal to or greater than 45 degrees and smaller than 90 degrees; A scintillator panel unit, wherein a second angle formed between a surface of the second scintillator panel facing the second scintillator layer and a side surface of the second scintillator panel facing the first scintillator panel is equal to or greater than 45 degrees and less than 90 degrees.

16. The support layer is an adhesive layer, the first scintillator panel is disposed on the adhesive layer with the first scintillator layer positioned on the adhesive layer side with respect to the first substrate; the second scintillator panel is disposed on the adhesive layer with the second scintillator layer positioned on the adhesive layer side with respect to the second substrate, The scintillator panel unit of claim 15 , wherein the adhesive layer is continuous across the first scintillator panel and the second scintillator panel.

17. The support layer is a moisture-proof layer, the first scintillator panel is disposed on the moisture-proof layer in a state in which the first substrate is positioned on the moisture-proof layer side with respect to the first scintillator layer, the second scintillator panel is disposed on the moisture-proof layer in a state in which the second substrate is positioned on the moisture-proof layer side with respect to the second scintillator layer, The scintillator panel unit according to claim 15 , wherein the moisture-proof layer is continuous across the first scintillator panel and the second scintillator panel.

18. the first scintillator panel further includes a first protective layer covering the first substrate and the first scintillator layer; 18. The scintillator panel unit according to claim 15, wherein the second scintillator panel further comprises a second protective layer covering the second substrate and the second scintillator layer.

19. a first moisture-proof layer disposed on the first scintillator panel on a side opposite to the adhesive layer; a second moisture barrier layer disposed on the second scintillator panel on the side opposite the adhesive layer; a first protective layer covering the first scintillator panel and the first moisture-proof layer; The scintillator panel unit according to claim 16 , further comprising: a second protective layer covering the second scintillator panel and the second moisture-proof layer.

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