PROBLEM TO BE SOLVED: To provide a technique for improving accuracy of detecting a radiation dose entered into a radiation imaging device.SOLUTION: A radiation imaging device comprises: an imaging region in which a plurality of conversion elements used for an imaging operation of acquiring a radiation image in accordance with incidence of a radiant ray are provided； an element for detecting the radiation dose of the radiant ray entered into the imaging region； a reading part； and a control part. The control part corrects a signal for detecting read out from the element for detecting by the reading part during the incidence of the radiant ray in a second imaging operation performed next to a first imaging operation on the basis of a correction amount acquired on the basis of a signal for correcting read out from the element for detecting by the reading part after the completion of the incidence of the radiant ray in the first imaging operation, and detects the radiation dose that is entered in the second imaging region on the basis of the signal for detecting to be corrected.SELECTED DRAWING: Figure 3【課題】放射線撮像装置に入射する放射線量を検出する精度を向上する技術を提供する。【解決手段】放射線の入射に応じた放射線画像を取得する撮像動作に用いるための複数の変換素子が配された撮像領域と、該撮像領域に入射する放射線の放射線量の検出を行う検出用素子と、読出部と、制御部と、を備える放射線撮像装置であって、制御部は、第１の撮像動作での放射線の入射の終了の後に読出部によって検出用素子から読み出された補正用信号に基づいて取得された補正量に基づいて、第１の撮像動作の次に行われる第２の撮像動作における放射線の入射中に読出部によって検出用素子から読み出された検出用信号を補正し、補正された検出用信号に基づいて、第２の撮像動作において入射する放射線量を検出する。【選択図】図３
