The radiation image pickup device of this invention to divide the case where recursive transaction of operation is done, from midst of the pixel group which consists of each detection pixel which corresponds to each position of radiation detection expedient respectively, in the place where recursive transaction of operation is done and the place where recursive transaction of operation is not done, at the place where recursive transaction of operation is done removing time late amount with recursive transaction of operation, after the revising in order to seek the radiation detection signal, because it is constituted, equal to the amount where at the place where it does not do recursive transaction of operation recursive transaction of operation was not done at least, excluded recursive transaction of operation for recursive transaction of operationMaking the computational complexity decrease, it is possible to remove time late amount from the radiation detection signal.この発明の放射線撮像装置は、再帰的演算処理を行う際には、放射線検出手段の各々の位置にそれぞれ対応した各々の検出画素からなる画素群の中から、再帰的演算処理を行う箇所と再帰的演算処理を行わない箇所とに区分し、再帰的演算処理を行う箇所では再帰的演算処理によって時間遅れ分を除去して、補正後放射線検出信号を求めるように構成されているので、再帰的演算処理を行わない箇所では少なくとも再帰的演算処理が行われず、再帰的演算処理を省いた分だけ再帰的演算処理のための計算量を低減させて、放射線検出信号から時間遅れ分を除去することができる。
