Patent ID: 9417333
Filing Date: 2016-08-16
CPC Classification: G01T,H04N

Claim Text:
1. A radiation imaging apparatus comprising: a detector including a detection unit in which pixels having a conversion element that converts radiation into an electric charge are arranged in a matrix shape, a drive circuit configured to drive the detection unit to output electric signals that correspond to the electric charges from the pixels, and a read circuit configured to output the electric signals as image data; a radiation detection unit configured to detect an irradiation state of radiation at a plurality of positions in the detection unit such that the irradiation state of radiation at least at a center region in the detection unit and at a peripheral region in the detection unit that is separated from the center region is detected, the irradiation state of radiation being different from the image data; and a control unit configured to control operations of the drive circuit and the read circuit in accordance with a detection result obtained by the radiation detection unit, wherein the radiation detection unit is configured to have a plurality of sensitivities such that the sensitivity at the center region in the detection unit is greater than the sensitivity at the peripheral region in the detection unit.