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

摘要

PPROBLEM TO BE SOLVED: To increase the estimation precision of a phase by correcting a blur quantity resulting from a focal size of a radiation source for the intensity of X rays used for solutions such as a finite element method. PSOLUTION: This phase information restoring method includes four steps (a), (b), (c) and (d). In the step (a), the blur quantity is corrected regarding at least one from among a plurality of detected data obtained by detecting the intensity of a radiation on a plurality of detection surfaces of which the distances from a patient are different. In the step (b), differential data indicating a differential between first detection data and second detection data from among a plurality of detection data wherein the blur quantity has been corrected regarding at least one of them. In the step (c), the Laplacian of the phase is determined based on a plurality of detection data, either one from among the detection data of which the blur quantity has been corrected, and the differential data. In the step (d), phase data is obtained by applying a reverse Laplacian operation to the Laplacian of the phase. PCOPYRIGHT: (C)2004,JPO