PROBLEM TO BE SOLVED: To provide a radiation image capturing device capable of stably performing at least two detections of the irradiation start and completion of radiation and the irradiation quantity of radiation even in a case that a change in the irradiation quantity per a unit time of the radiation emitted at the time of photographing is large, and to provide a radiation image capturing system.SOLUTION: A plurality of sensors 146 different in the sensitivity to radiation are arranged so as to be superposed on a radiation detector 60 and used properly to perform at least two detections of the irradiation start and completion of radiation and the irradiation quantity of radiation.COPYRIGHT: (C)2012,JPO&INPIT【課題】撮影時に照射される放射線の単位時間当たりの照射量の変化が大きい場合でも、放射線の照射開始、放射線の照射終了、及び放射線の照射量の少なくとも2つの検出を安定して行える放射線撮影装置及び放射線撮影システムを提供する。【解決手段】放射線検出器60と重なるように放射線に対する感度が異なる複数のセンサ部146を配置し、複数のセンサ部146を使い分けて放射線の照射開始、放射線の照射終了、及び放射線の照射量の少なくとも2つの検出を行う。【選択図】図4
