Patent ID: 7006599

Claim:
A radiographic apparatus having radiation emitting means for emitting radiation toward an object under examination, radiation detecting means for detecting radiation transmitted through the object under examination, and signal sampling means for taking radiation detection signals from the radiation detecting means at predetermined sampling time intervals, for obtaining radiographic images based on the radiation detection signals outputted from the radiation detecting means at the predetermined sampling time intervals as radiation is emitted to the object under examination, said apparatus comprising: temperature measuring means for measuring temperature of said radiation detecting means; and time lag removing means for removing lag-behind parts from the radiation detection signals by a recursive computation, on an assumption that a lag-behind part included in each of said radiation detection signals taken at the predetermined sampling time intervals is due to an impulse response formed of one exponential function or a plurality of exponential functions with different attenuation time constants; wherein said time lag removing means is arranged to determine said impulse response based on a result provided by said temperature measuring means, and obtain a corrected radiation detection signal by removing the lag-behind part based on said impulse response corresponding to said result.