PROBLEM TO BE SOLVED: To provide a radiation image shooting device which does not falsely detect irradiation start of a radiant ray when a disturbance, such as impact or oscillation, is applied, and capable of detecting irradiation start of a radiant ray accurately when the radiant ray is irradiated.SOLUTION: A radiation image shooting device 1 repeats detection of irradiation start of a radiant ray, by a first detection system for detecting irradiation start of the radiant ray on the basis of the data from each radiation detection element 7, or the data from a radiation detection pixel, at a prescribed period, and repeats detection of irradiation start of the radiant ray, by a second detection system for detecting irradiation start of the radiant ray on the basis of the output value from the radiation sensor 25, at the same period as detection by the first detection system, and when irradiation start of the radiant ray is detected by any one of the first and second detection systems, or by both systems, a switch element 8 is turned off, and transition is made a state where charges are accumulated in the radiation detection element 7.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2020,JPO&INPIT【課題】衝撃や振動等の外乱が加わった場合には放射線の照射開始を誤検出せず、放射線が照射された場合には放射線の照射開始を的確に検出することが可能な放射線画像撮影装置を提供する。【解決手段】放射線画像撮影装置１は、各放射線検出素子７からのデータ、又は放射線検知用画素からのデータに基づいて放射線の照射開始を検出する第１の検出方式による放射線の照射開始の検出を所定周期で繰り返し行うとともに、放射線センサー２５の出力値に基づいて放射線の照射開始を検出する第２の検出方式による放射線の照射開始の検出を第１の検出方式による検出と同一周期で繰り返し行い、第１の検出方式と第２の検出方式の何れかの方式により、又は両方の方式により放射線の照射開始を検出した場合には、スイッチ素子８をオフ状態として放射線検出素子７内に電荷が蓄積される状態に移行させる。【選択図】図６
