PROBLEM TO BE SOLVED: To provide a radiation image photographing device which can precisely detect irradiation start of a radiation ray with the device itself by using an existing function section in the device.SOLUTION: Control means 22 of a radiation image photographing device 1 allows repeat of: reading processing for applying ON-state voltage from a gate driver 15b to a single or a plurality of scan lines 5d which are previously designated among all scan lines 5 connected to a gate driver 5b of scan driving means 15 before a radiation image is photographed to read irradiation start detection data d and reset processing of respective radiation detection elements 7 for sequentially applying the ON-state voltage to a single or a plurality of scan lines 5 except for the plurality of scan lines 5d which are previously designated from the gate driver 15b. The control means detects that irradiation of a radiation ray is started on the basis of the irradiation start detection data d which is read.COPYRIGHT: (C)2013,JPO&INPIT【課題】装置に既設の機能部を用いて、装置自体で的確に放射線の照射開始を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の制御手段22は、放射線画像撮影前に、走査駆動手段15のゲートドライバー5bに接続されている全ての走査線5のうち予め指定された単数または複数の走査線5dに対してゲートドライバー15bからオン電圧を印加させて照射開始検出用データdを読み出す読み出し処理と、ゲートドライバー15bから予め指定された複数の走査線5d以外の単数または複数の走査線5にオン電圧を順次印加して行う各放射線検出素子7のリセット処理とを繰り返し行わせ、読み出した照射開始検出データdに基づいて放射線の照射が開始されたことを検出する。【選択図】図3
