Method for processing electric signals of radiographic image recorded in stimulable phosphor sheet

A method for processing electric signals of a radiographic image which are obtained by the steps of scanning a stimulating light beam on a stimulable phosphor sheet comprising a stimulating light-reflective or light-absorbent grid and stimulable phosphor-containing microcells surrounded by the grid and having a radiographic image recorded therein in a direction along the grid and photoelectrically collecting in sequence stimulated emissions emitting from the stimulable phosphor-containing microcells, which comprises the steps of:

• detecting a signal of a grid surrounding a microcell and a signal strength I corresponding to the microcell surrounded by the grid, so as to determine a signal strength I(x,y) in a microcell residing in a position (x,y) which is determined from a size information of the stimulable phosphor sheet and an order of the detected signal corresponding to the grid;
• determining a correcting value for the signal strength I(x,y) according to the following formula:
• correcting value=I(x,y)/I0(x,y)
• wherein I0(x,y) is a base sensitivity strength which is predetermined in the microcell residing in the position (x,y);
• and
• processing each signal strength detected in each microcell using each correcting value determined in each microcell, in consideration of a predetermined pixel size of the radiographic image, to obtain a corrected radiographic image data.