PROBLEM TO BE SOLVED: To provide a radiographic imaging apparatus capable of accurately detecting irradiation start of radiation by the apparatus itself and accurately performing radiographic imaging even when the dose rate of the radiation irradiated to the apparatus is low.SOLUTION: The control means 22 of the radiographic imaging apparatus 1 makes read processing of image data d for irradiation start detection be repeatedly performed by applying an ON voltage to all scanning lines 5 or some scanning lines 5 connected to a gate driver 15b before radiographic imaging, performs processing of calculating a difference Δd between the read image data d for the irradiation start detection and the image data d for the irradiation start detection read in the read processing immediately before for each read processing, adds the calculated difference Δd to the integrated value ΣΔd of the differences by every time the difference Δd is calculated, and detects that the irradiation of the radiation is started at the point of time when the integrated value ΣΔd of the differences to which the difference Δd is added exceeds a set threshold Σth.COPYRIGHT: (C)2013,JPO&INPIT【課題】装置に照射される放射線の線量率が小さい場合でも、装置自体で的確に放射線の照射開始を検出して放射線画像撮影を的確に行う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、ゲートドライバー15bに接続されている全走査線5または一部の複数の走査線5にオン電圧を印加させて照射開始検出用の画像データdの読み出し処理を繰り返し行わせるとともに、読み出した照射開始検出用の画像データdと、その直前の読み出し処理で読み出された照射開始検出用の画像データdとの差分Δdを算出する処理を読み出し処理ごとに行い、差分Δdを算出するごとに、算出した差分Δdを、それまでの差分の積算値ΣΔdに加算し、当該差分Δdを加算した差分の積算値ΣΔdが、設定された閾値Σthを越えた時点で放射線の照射が開始されたことを検出する。【選択図】図3
