PROBLEM TO BE SOLVED: To prevent multiple columnar crystals in a peripheral part from being in contact with each other in a configuration in which a scintillator having the columnar crystals vertically arranged on a light emission side is included and a clearance between the adjacent columnar crystals is changed when a load is applied to a top plate of a housing.SOLUTION: A scintillator 27 adapted to generate light by exposure of radiation comprises multiple columnar crystals 30 vertically arranged on one surface of a deposition substrate 26. The scintillator 27 is stored in a housing of an electronic cassette. When a load is applied to a top plate of the housing, a peripheral part 27b is significantly distorted compared to a center part 27a by receiving the load. Since a clearance L2 between the columnar crystals 30 in the peripheral part 27b is larger than a clearance L1 between the columnar crystals 30 in the center part 27a, even when the peripheral part 27b is significantly distorted, tips of the columnar crystals 30 in the peripheral part 27b are not in contact with each other and the columnar crystals 30 are not broken.COPYRIGHT: (C)2012,JPO&INPIT【課題】光射出側に柱状結晶が複数立設されたシンチレータを含み、筐体の天板に荷重が加わると隣り合う柱状結晶の間隔が変化する構成において、周辺部の柱状結晶同士が接触することを抑制する。【解決手段】放射線の照射により光を発生するシンチレータ27は、蒸着基板26の一方の面に複数立設された柱状結晶30を有する。シンチレータ27は、電子カセッテの筐体内に収められており、筐体の天板に荷重が加わったときに、その荷重を受けて周縁部27bが中央部27aよりも大きく歪むが、周縁部27bの柱状結晶30間の隙間L2は、中央部27aの柱状結晶30間の隙間L1よりも広くなっているので、周縁部27bが大きく歪んでも、周縁部27bの柱状結晶30の先端同士が接触して破損することはない。【選択図】図5
