PROBLEM TO BE SOLVED: To accurately perform synchronization control processing and irradiation control processing.SOLUTION: A radiation detector comprises: a light-emitting layer 13 for emitting light by being irradiated with radiation a substrate 22 that is laminated to the light-emitting layer 13 and that is formed with a plurality of pixels including sensor units where electric charges are generated by receiving light emitted from the light-emitting layer 13 and switching elements for reading out the electric charges generated in the sensor unit and a light guide plate 26 that is laminated on the side opposite to the side on which the substrate 22 of the light-emitting layer 13 is laminated or on the side opposite to the side on which the light-emitting layer 13 of the substrate 22 is laminated, that is optically separated into a respective plurality of areas, and where a light guide amount in some areas of the plurality of areas is made larger than a light guide amount in other areas other than the some areas.COPYRIGHT: (C)2013,JPO&INPIT【課題】同期制御処理および照射制御処理を的確に行うことができる。【解決手段】放射線が照射されることにより光を発生する発光層13と、発光層13に積層され、発光層13で発生した光を受光することにより電荷が発生するセンサ部および当該センサ部で発生された電荷を読み出すためのスイッチング素子を含む画素が複数個形成された基板22と、発光層13の基板22が積層された側と反対側、または基板22の発光層13が積層された側と反対側に積層され、各々複数の領域に光学的に分離され、複数の領域の一部の領域における導光量が一部の領域以外の他部の領域における導光量より多くされた導光板26と、を備えた。【選択図】図5
