SCATTERED RADIATION CORRECTION METHOD IN X-RAY COMPUTED TOMOGRAPH AND X-RAY COMPUTED TOMOGRAPH

摘要

PROBLEM TO BE SOLVED: To correct scattering in an X-ray computed tomography sufficiently taking account of individual proportion of an examination object while dispensing with an additional test scanning. SOLUTION: This scattered radiation correction method in the X-ray computed tomograph wherein the scattered radiation is determined based on a sinogram actually acquired from a scanning object 7 for correcting the scattered radiation in the X-ray computed tomograph having at least two X-ray sources, determines a latent scatter position Z on each measurement beam SMfrom the radiation tangent STbeing determined by the sinogram in the examination object 7, and calculates the intensity of the scattered radiation based on angular relationship among the scatter beam SS(=primary radiation) incident on the scatter position Z, the scatter beam SS, and the radiation tangent STand the measurement beam SMin the examination object 7. COPYRIGHT: (C)2008,JPO&INPIT