PROBLEM TO BE SOLVED: To provide a technique advantageous for reduction of artifacts.SOLUTION: A radiation imaging apparatus comprises: a pixel array having a plurality of imaging pixels for capturing a radiation image； and a drive circuit for driving the pixel array. The plurality of imaging pixels include a plurality of first pixels and a plurality of second pixels. The drive circuit drives the pixel array such that a storage period, during which signals are stored by at least one of the plurality of imaging pixels, begins in response to a start of projection of radiation, and after the end of the storage period, signals corresponding to the radiation projected in a first period included in the storage period is output from the plurality of first pixels, and signals corresponding to the radiation projected in a second period, different from the first period, included in the storage period are output from the plurality of second pixels.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2020,JPO&INPIT【課題】アーチファクトを低減するために有利な技術を提供する。【解決手段】放射線撮像装置は、放射線画像を撮像するための複数の撮像画素を有する画素アレイと、前記画素アレイを駆動する駆動回路とを備える。前記複数の撮像画素は、複数の第１画素と、複数の第２画素とを含む。前記駆動回路は、放射線の照射の開始に応じて前記複数の撮像画素の少なくとも１つによる信号の蓄積がなされる蓄積期間が開始され、前記蓄積期間の終了後に、前記蓄積期間に含まれる第１期間に照射された放射線に応じた信号が前記複数の第１画素から出力され、前記蓄積期間に含まれ、前記第１期間とは異なる第２期間に照射された放射線に応じた信号が前記複数の第２画素から出力されるように、前記画素アレイを駆動する。【選択図】図４
