PROBLEM TO BE SOLVED: To surely evade the situation that irradiation with radiation is not stopped even when the cumulative dose reaches a target dose.SOLUTION: An AEC unit 52 starts the output of irradiation continuation signals simultaneously with the monitoring start of an integrated value of dose detection signals from a detection pixel, and keeps outputting the irradiation continuation signals in a prescribed cycle while the integrated value does not reach a threshold. When the integrated value reaches the threshold, the output of the irradiation continuation signals is stopped. The irradiation continuation signals are wirelessly transmitted through an irradiation signal I/F 78 to the irradiation signal I/F of a source controller. The source controller makes the irradiation with X-rays by an X-ray source be stopped when the irradiation continuation signals are not received anymore in the irradiation signal I/F.COPYRIGHT: (C)2013,JPO&INPIT【課題】累積線量が目標線量に達しても放射線の照射が停止されない事態を確実に回避する。【解決手段】AEC部52は、検出画素からの線量検出信号の積算値のモニタリング開始と同時に照射継続信号の出力を開始し、積算値が閾値に達しない間、照射継続信号を所定の周期で出力し続ける。積算値が閾値に達したら照射継続信号の出力を止める。照射継続信号は照射信号I/F78を介して線源制御装置の照射信号I/Fに無線送信される。線源制御装置は、照射信号I/Fで照射継続信号が受信されなくなったらX線源によるX線の照射を停止させる。【選択図】図5
