Erasing device

摘要

A preceding erasure time stored in an IC chip embedded in a stimulable phosphor sheet is read in step S 3 . After radiation image information is read from the stimulable phosphor sheet in step S 5 , an elapsed time up to the present time is calculated in step S 6 , and a required amount of erasing light corresponding to the elapsed time is read from a required-amount-of-applied-light memory in step S 7 . An erasing light application time is calculated from the radiation image information and the read required amount of erasing light in step S 8 . Erasing light sources are energized for the calculated erasing light application time to apply erasing light to the stimulable phosphor sheet to erase remaining radiation energy therefrom in step S 10.