PROBLEM TO BE SOLVED: To provide a radiographic apparatus capable of setting an appropriate radiation irradiation time even when communication is cut off during radiation irradiation.SOLUTION: A radiographic apparatus includes a radiation irradiation device (101), an input device (104) for giving an instruction to start and stop the radiation irradiation, a radiation detection device (102) for detecting the radiation, and a relay device (103). The radiation detection device includes an AEC pixel for generating a pixel value according to the radiation, and an AEC determination part for transmitting an irradiation instruction signal indicating a stop of the radiation irradiation to the radiation irradiation device through the relay device when an instruction to stop the radiation irradiation is given by the input device, or when the pixel value of the AEC pixel is larger than a threshold.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】放射線照射中に通信が切断された場合でも、適切な放射線照射時間を設定することができる放射線撮影装置を提供することを課題とする。【解決手段】放射線撮影装置は、放射線照射装置（１０１）と、放射線照射の開始及び停止を指示する入力装置（１０４）と、放射線を検出する放射線検出装置（１０２）と、中継装置（１０３）とを有し、放射線検出装置は、放射線に応じた画素値を生成するＡＥＣ画素と、入力装置の放射線照射の停止が指示された場合、又はＡＥＣ画素の画素値が閾値より大きい場合には、放射線照射停止を示す照射指示信号を、中継装置を介して放射線照射装置に送信するＡＥＣ判定部とを有する。【選択図】図２
