The picture difference in level which receives the influence of the lighting territory which can occur in the picture which is acquired without doing complicated image processing, is made to decrease, the image pickup device whose it is possible to prevent considerable picture quality decrease, is offered. The pixel plural being arranged in queue condition, detector 104 in order to do photographing operation and the bias illuminant the control section 106 where controls the operation of 115 and detector 104 and the operation of the bias illuminant 115 and, it relates to the image pickup device 100 which it possesses. Photographing operation includes, the 2nd photographing operation which outputs the graphics data which responds to the radiation which was irradiated with the radiation field B whose 1st the graphics data which responds to the radiation which was irradiated to the detector with the radiation field A which is suitable to the pixel of part is output is wider than photographing operational and radiation field A and. As for control section 106, from radiation field A attendant upon the modification to B, 1st photographing operation and during 2nd photographing operation, in order to irradiate bias light with the integral dose of the bias light which is decided on the basis of the information regarding the integral dose of the radiation in 1st photographing operating, operation of the bias illuminant 115 is controlled.複雑な画像処理を行うことなく、取得された画像に発生し得る照射領域の影響を受けた画像段差を低減させ、著しい画質低下を防ぐことが可能な撮像装置を提供する。画素が行列状に複数配置されて撮影動作を行うための検出器104と、バイアス光源115と、検出器104の動作とバイアス光源115の動作を制御する制御部106と、を有する撮像装置100に係る。撮影動作は、一部の画素に相当する照射野Aで検出器に照射された放射線に応じた画像データを出力する第1の撮影動作と、照射野Aより広い照射野Bで照射された放射線に応じた画像データを出力する第2の撮影動作と、を含む。制御部106は、照射野AからBへの変更に伴い、第1の撮影動作と第2の撮影動作の間に、第1の撮影動作における放射線の積分線量に関する情報に基づいて決定されたバイアス光の積分線量でバイアス光の照射を行うように、バイアス光源115の動作を制御する。
