Patent ID: 8818068

Claim:
An imaging apparatus comprising: a detector in which a plurality of pixels each including a conversion element that converts radiation or light into an electric charge are arranged in a matrix form and which performs an image capturing operation to output image data corresponding to radiation or light that is emitted; and a control unit configured to control operations including the image capturing operation of the detector, wherein the image capturing operation includes a first image capturing operation in which the detector is scanned in a first scanning area corresponding to part of the plurality of pixels to output image data in the first scanning area and a second image capturing operation in which the detector is scanned in a second scanning area larger than the first scanning area to output image data in the second scanning area, and the second image capturing operation includes an accumulation operation in which the conversion element converts radiation or light with which the conversion element is irradiated into an electrical charge, an image output operation for outputting image data on the basis of the electric charge, and an operation to initialize the conversion element which is performed before the accumulation operation, and wherein the control unit is configured to control the detector to perform an initialization operation to initialize the conversion element which is performed during the same length of a period as the operation to initialize the conversion element during a period between the first image capturing operation and the operation to initialize the conversion element if the image capturing operation is switched from the first image capturing operation to the second image capturing operation.