Radiation image read-out method

摘要

In a radiation image read-out method for a radiation image recording and read-out system in which a stimulable phosphor sheet is used for storing radiation image information therein and the stimulable phosphor sheet is exposed to stimulating rays to emit light in proportion to the stored radiation energy and then the emitted light is detected and converted to electric image signals for displaying or reproducing a visible radiation image, there occurs a so-called flare phenomenon so that the stimulating light beam impinging upon the sheet is reflected by the surface of the sheet and the reflected stimulating light or scattering light is re-reflected by various parts of the read-out apparatus and impinges upon the sheet once more causing light emitted again therefrom. The noise caused by the flare phenomenon is eliminated by calculation, subtracting a part of the light emitted caused by the scattering light from the detected amount of light emitted from the sheet. The ratio of the amount of the scattering light to the amount of the stimulating light beam which impinges upon the sheet at the desired scanning point is obtained in advance by calculation or experiment, and the detected amount of light emitted from the sheet is corrected by use of the said ratio.