PHANTOM, AND PERFORMANCE DECISION METHOD AND SYSTEM FOR RADIATION IMAGE INFORMATION GENERATOR

摘要

PROBLEM TO BE SOLVED: To decide performance of energy subtraction processing of a radiation image information generator by making a phantom in imitation of an organism tissue wherein a plurality of substances are combined and photographing the phantom by the radiation image information generator. SOLUTION: This phantom 50 comprises a first constituting material 52 of aluminum material equal to an effective atomic number of a bone part, and a second constituting material 54 of an acrylic resin equal to an effective atomic number of a soft part. The first constituting material 52 and the second constituting material 54 each have three thick parts, and are disposed such that the first constituting material 52 and the second constituting material 54 are crossed in a lattice state. By photographing the phantom 50 by the radiation image information generator 14 and examining a gradation of a photographed image by a processor 12, the performance of the energy subtraction processing of the radiation image information generator 14 can be decided.