| 摘要 |
A residual image signal, which represents a residual image remaining on a stimulable phosphor sheet having been subjected to an erasing operation, is acquired. A radiation image of an object is then recorded on the stimulable phosphor sheet, from which the residual image signal has been detected. A radiation image signal, which represents the radiation image of the object, is then acquired, the thus acquired radiation image signal containing a residual image signal, which represents the residual image. The residual image signal is subtracted from the radiation image signal, and a radiation image signal, which represents the radiation image of the object and which is free from the residual image signal, is acquired.
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