Patent ID: 7408169

Claim:
A radiation image sensing apparatus for sensing a radiation by a sensing unit and outputting an electric signal corresponding to the sensed radiation, said sensing unit comprising: an insulating substrate; a conversion section arranged over the insulating substrate and, configured to have a first semiconductor conversion element for converting the radiation into an electrical signal and a switch element connected to the first semiconductor conversion element; a second semiconductor conversion element arranged over the insulating substrate, configured to convert the radiation into an electrical signal for detecting a dose of the radiation incident on said conversion section; and a bias line which is connected to a first electrode arranged for said first semiconductor conversion element and a second electrode arranged for said second semiconductor conversion element, and at least one of the first electrode and the second electrode includes a transparent electrode layer, wherein a first pixel region, which includes the first semiconductor conversion element and the second semiconductor conversion element, and a second pixel region, which includes the first semiconductor conversion element and no second semiconductor conversion element, are arranged on the insulating substrate, the size of the first pixel region is substantially equal to that of the second pixel region, and a light-receiving area of the first semiconductor conversion element in the first pixel region is smaller than that of the first semiconductor conversion element in the second pixel region.