Energy subtraction processing method and apparatus, superposition processing method and apparatus, and radiation image read-out apparatus.

摘要

An energy subtraction processing method for radiation images comprises the steps of irradiating radiation, which has a predetermined energy range, to an object, and irradiating the radiation, which has passed through the object, to a recording medium capable of recording a plurality of radiation images during its exposure to radiation with different energy distributions. A plurality of radiation images of the object are thereby recorded on the recording medium. From the recording medium on which the radiation images have been recorded, a plurality of image signals are obtained which represent the radiation images of the object. An MTF correcting process is carried out on the image signals such that differences between MTF's of the radiation images of the object may be eliminated. Subtracting operations are then carried out on image signals, which are obtained from the MTF correcting process.