PROBLEM TO BE SOLVED: To provide a radiation imaging device and a radiation imaging system, which can perform output in accordance with a radiation irradiating amount.SOLUTION: A radiation imaging device includes: a plurality of pixel circuits which respectively output signals by converting radiation into electric charges and a control part which performs reset drive (R1) for resetting the electric charges of the pixel circuits and processing for reading out the signals of the plurality of pixel circuits. The control part repeatedly performs reset processing for performing the reset drive (R1) collectively performed on the plurality of pixel circuits in one of a plurality of regions into which the plurality of pixel circuits are divided in a period of time different from the reset drive (R1) collectively performed on the plurality of pixel circuits in a region different from the one region among the plurality of regions until the irradiation of the radiation is detected on the basis of the signals of the pixel circuits.COPYRIGHT: (C)2015,JPO&INPIT【課題】放射線照射量に応じた出力を行うことができる放射線撮像装置及び放射線撮像システムを提供することを課題とする。【解決手段】放射線撮像装置は、各々が放射線を電荷に変換して信号を出力する複数の画素回路と、前記画素回路の電荷をリセットするリセット駆動(R1)と、前記複数の画素回路の信号を読み出す処理と、を行う制御部と、を有する放射線撮像装置であって、前記制御部は、前記複数の画素回路が分けられた複数の領域のうち一の領域の複数の画素回路に対して一括に行う前記リセット駆動(R1)を前記複数の領域のうち前記一の領域とは別の異なる領域の複数の画素回路に対して一括に行う前記リセット駆動(R1)とは別の期間に行うリセット処理を、前記画素回路の信号を基に放射線の照射を検出するまで繰り返し行うことを特徴とする。【選択図】図7
