PROBLEM TO BE SOLVED: To provide a radiographic image photographing device capable of accurately detecting that radiation is irradiated by the radiographic image photographing device itself and accurately preventing a step from occurring in true image data D*.SOLUTION: Control means 22 of a radiographic image photographing device 1 allows a read-out processing of leakage data dleak and a reset processing of each radiation detecting element 7 to be alternately performed before photographing a radiographic image. When irradiation start of radiation is detected at a point where the leakage data dleak exceeds a threshold value dleak_th, a read-out processing of image data D is allowed to be performed after charge storage, and after the read-out processing of the image data D, a read-out processing L of the leakage data dleak and a reset processing R of each radiation detecting element 7 are allowed to be alternately performed at the same cycle τ as the read-out processing or the like of the leakage data dleak before detecting the irradiation start of radiation. After shifting to a charge storage state, a read-out processing of offset data O is allowed to be performed at the same cycle as the read-out processing of the image data D.COPYRIGHT: (C)2013,JPO&INPIT【課題】放射線画像撮影装置自体で放射線が照射されたことを的確に検出することが可能で、真の画像データD*に段差が生じることを的確に防止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の制御手段22は、放射線画像撮影前に、リークデータdleakの読み出し処理と各放射線検出素子7のリセット処理とを交互に行わせ、リークデータdleakが閾値dleak_thを越えた時点で放射線の照射開始を検出すると、電荷蓄積後、画像データDの読み出し処理を行わせるとともに、画像データDの読み出し処理後、放射線の照射開始検出前のリークデータdleakの読み出し処理等と同じ周期τでリークデータdleakの読み出し処理Lと各放射線検出素子7のリセット処理Rとを交互に行わせ、電荷蓄積状態に移行した後、画像データDの読み出し処理と同じ周期でオフセットデータOの読み出し処理を行わせる。【選択図】図19
