PROBLEM TO BE SOLVED: To provide a technique for improving the accuracy of radiation detection by correcting a change in a signal caused by crosstalk and improving the accuracy of the correction.SOLUTION: A radiation imaging apparatus includes: a first detection pixel including a first switch element, and a second detection pixel including a second switch element and having a different sensitivity for detecting radiation from that of the first detection pixel； a first signal line to which a signal is output via the first switch element in a conduction state and a second signal line to which a signal is output via the second switch element in a conduction state； a reading circuit that performs a first operation for reading the first and second signals appearing in the first and second signal lines while the first and second switch elements are not made conductive, and a second operation for reading third and fourth signals appearing in the first and second signal lines by the conduction of the first and second switch elements, in a time period when a radiation imaging apparatus is irradiated with radiation； and an information processing circuit that performs processing for generating information on radiation irradiation on the basis of the first to fourth signals.SELECTED DRAWING: Figure 10【課題】 クロストークに起因する信号の変化を補正し、その補正の精度を向上させることにより放射線の検出の正確性を向上する技術を提供する。【解決手段】 第１スイッチ素子を含む第１検出用画素及び第２スイッチ素子を含み第１検出用画素とは放射線を検出する感度が異なる第２検出用画素と、導通状態の第１スイッチ素子を介して信号が出力される第１信号線及び導通状態の第２スイッチ素子を介して信号が出力される第２信号線と、放射線撮像装置に放射線が照射されている期間に、第１及び第２スイッチ素子を導通しない状態で第１及び第２信号線に現れる第１及び第２信号を読み出す第１動作と、第１及び第２スイッチ素子が導通することによって第１及び第２信号線に現れる第３及び第４信号を読み出す第２動作と、を行う読出し回路と、第１乃至第４信号に基づいて放射線照射に関する情報を生成する処理を行う情報処理回路と、を含む。【選択図】 図１０
