ACQURING METHOD OF ENERGY SUBTRACTION IMAGE, RADIATION PHOTOGRAPHING READER, IMAGE PROCESSOR, RADIATION IMAGE CONVERTING PANEL WITH FILTER AND RADIATION FILTER

摘要

PROBLEM TO BE SOLVED: To easily acquire an energy subtraction image without increasing cost in a radiation photographing reader. SOLUTION: The radiation transmitted through a subject is allowed to enter though two kinds of filters mutually different in energy absorbing characteristics with respect to the radiation to read the radiation image Z1 expressing the subject recorded on a radiation image converting panel to obtain an image signal G. The partial image signal Ga in the image signal G showing the corresponding regions 1A corresponding to the filters and the interpolation image signal Fa expressing the region 2A other than the corresponding region 1A obtained from the partial image signal Ga by interpolation are combined at every kind of the filters to form a combined image signal So1 and the energy subtraction processing is performed between the combined image signals So1 and So2 formed at every kind of the filters to form the energy subtraction image. COPYRIGHT: (C)2006,JPO&NCIPI