PHASE INFORMATION RESTORING METHOD AND PHASE INFORMATION RESTORING DEVICE, AND PHASE INFORMATION RESTORING PROGRAM

摘要

PPROBLEM TO BE SOLVED: To reduce the effects of noises without increasing the irradiation dose of X rays when a radiation image is composed for a biological state for a human body or the like by a phase contrast method. PSOLUTION: This phase information restoring method restores the phase information of radiation which has passed through a patient based on detection data acquired by detecting the intensity of the radiation which is generated from a light source of a focal size at a location of a distance R from the patient, and has passed through the patient. The phase information restoring method includes steps (a) and (b). In the step (a), a plurality of detection data are acquired by using a radiation detector which forms detection data indicating radiation image information of which the image size is z/3R or higher (z is a maximum value of zSBi/SB) by detecting the intensity of the cast radiation on a plurality of detection surfaces of which the distances zSBi/SBfrom the patient are different. In the step (b), phase data is acquired by restoring the phase information of the radiation which has passed through patient based on a plurality of the detection data. PCOPYRIGHT: (C)2004,JPO