Patent ID: 7810997

Claim:
A radiographic apparatus for obtaining radiographic images based on radiation detection signals, comprising: a radiation emitting device for emitting radiation toward an object under examination; a radiation detecting device for detecting radiation transmitted through the object; an offset image storage device for storing offset images corresponding to a plurality of storage times for accumulating information on signals, the offset images being used to perform offset correction for removing offset values superimposed on the signals; a non-irradiation signal acquiring device for acquiring a plurality of radiation detection signals detected from the radiation detecting device in time of non-irradiation before irradiation of the radiation in an imaging event; a lag image acquiring device for acquiring a lag image based on the plurality of radiation detection signals acquired by the non-irradiation signal acquiring device, and the offset images stored in said offset image storage device and corresponding to storage times for the non-irradiation signal acquiring device; an irradiation signal acquiring device for acquiring radiation detection signals detected from the radiation detecting device in time of irradiation of the radiation in the imaging event; a radiographic image acquiring device for acquiring a radiographic image based on the radiation detection signals acquired by the irradiation signal acquiring device, and the offset images stored in said offset image storage device and corresponding to the storage times for the irradiation signal acquiring device; and a lag correcting device for removing lags, using the lag image acquired by said lag image acquiring device, from the radiographic image acquired by the radiographic image acquiring device, thereby performing a lag correction of lag-behind parts by removing the lag-behind parts from the radiation detection signals.