Patent ID: 7436444

Claim:
A radiation image pick-up apparatus comprising: a plurality of pixels being arranged two dimensionally along rows and columns, and each including a conversion element for converting a radiation into an electrical signal and a reading element for transferring the electrical signal from the conversion element; a drive circuit for driving the plurality of pixels sequentially row by row of the pixels; a detection element for detecting a start and an end of emission of the radiation; and a control circuit for controlling the drive circuit, wherein the control circuit controls the drive circuit such that the radiation image pickup apparatus performs a first operation of driving the reading elements of the plurality of pixels by driving the reading elements of the plurality of pixels row by row for stabilizing the conversion element, performs a second operation for converting the radiation into the electric signal by the conversion element after the first operation and for accumulating the electric signal, and performs a third operation of driving the reading elements of the plurality of pixels by driving the reading elements of the plurality of pixels row by row for reading out the electric signal of the conversion element by the reading element, wherein the first operation is performed repeatedly until a transition into the second operation, wherein the control circuit controls the drive circuit such that, when the detection element detects the start of emission of the radiation, the radiation image pickup apparatus performs a transition from the first operation, performed repeatedly, into the second operation, and wherein the control circuit controls the drive circuit such that, when the detection element detects the end of emission of the radiation, the radiation image pickup apparatus performs a transition from the second operation into the third operation.