Patent ID: 8155410

Claim:
An image processing device processing image data obtained from a radiographic image detector that is provided with signal lines extending along a predetermined direction, converts irradiated radiation into charge, and accumulates and holds the converted charge, the image data being obtained by sequentially reading out, as a current through the signal lines, the charge from each of unit regions to be read out from the radiographic image detector, the device comprising: a correction section that corrects the image data for each unit region, the correction section estimating the respective leakage current superimposed on the read-out current when the charge is read out from a target unit region using a leakage current estimation equation, formed from a single exponential function or from a sum of a plurality of exponential functions, for respective leakage currents I j of unit regions j (j=1, 2, . . . ) that are positioned along the predetermined direction on the same signal line as that of the target unit region and whose charges are in an unread state when the charge of the target unit region is being read out, and the correction section correcting the image data corresponding to the target unit region on the basis of the leakage current estimate result; wherein the exponential function(s) has as a variable one of: (a) elapsed time from the time of leakage current generation of the unit region j up to when charge is read out therefrom, (b) elapsed time from starting to read out charge of the radiographic image detector up to when charge is read out from the unit region j, or (c) position along the predetermined direction of the target unit region when charge is read out therefrom by scanning the target unit regions to be readout along the predetermined direction.