Radiation image read-out apparatus, radiation image recording method and apparatus, stimulable phosphor sheet, and cassette

摘要

In a radiation image read-out apparatus, a phosphor sheet (70), represented by the formula Gd2O2S:Tb3+, is located facing a stimulable phosphor sheet (10) in such a manner that when it is exposed to x-rays (44) it produces fluorescence (71) having a wavelength that fall within the stimulation wavelength range of the stimulable phosphor. When the stimulable phosphor sheet (10) is exposed to the fluorescence (71), part of the energy stored on the layer of stimulable phosphor during its exposure to the x-rays (44) is released. In this manner, the stimulable phosphor sheet (10) is approximately simultaneously subjected to the operation for recording the radiation image and the operation for slightly erasing the energy store thereon during its exposure to the x-rays (44).