Radiation image detecting device and radiation imaging system

A radiation imaging system for carrying out imaging by using a scattered radiation removing grid having radiation absorbing portions for absorbing radiation and radiation transmitting portions for transmitting said radiation alternately and periodically arranged in a first direction, said radiation imaging system comprising:

• (A) a radiation generating device including a radiation source for emitting radiation;
• and
• (B) a radiation image detecting device for detecting a radiographic image, including:
• a detection panel having an imaging surface provided with a plurality of pixels for converting said radiation emitted from said radiation source into an electric signal, for detecting said radiographic image of an object;
• a plurality of dose detection sensors provided for performing exposure control of said radiographic image, said plurality of dose detection sensors being disposed in said imaging surface periodically with leaving space in said first direction, for detecting a dose of said radiation passed through said object and outputting a signal in accordance with said dose;
• and
• an arrangement period of said radiation absorbing portions being different from an arrangement period of said plurality of dose detection sensors in said first direction in said imaging surface.