Patent ID: 6847698
Filing Date: 2005-01-25
Classification: A61B,H05G

Abstract:
1. A radiation image sensing apparatus comprising: an image sensing unit which is capable of nondestructively reading and includes a plurality of pixel portions for sensing an object image by passing radiation from a radiation source through an object; a drive circuit which drives said image sensing unit so that a first signal which is obtained by resetting said plurality of pixel portions is read out nondestructively from said image sensing unit, thereafter a signal is read out nondestructively a plurality of times from said image sensing unit without resetting, and subsequently a second signal is read out nondestructively from said image sensing unit without resetting said plurality of pixel portions; a differential circuit which effects differential operation of the first signal and the second signal; and a control circuit which effects control to stop emission of radiation from the radiation source on the basis of a signal non-destructively read out from said image sensing unit by said drive circuit.