X-RAY ENERGY SPECTRUM MEASURING METHOD, X-RAY ENERGY SPECTRUM MEASURING DEVICE AND X-RAY CT DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an X-ray energy spectrum measuring method capable of executing the reconfiguration of a CT image with high accuracy by reproducing attenuation path information irradiated with X-rays with high accuracy by making an energy spectrum emitted from an X-ray source device estimatable with high accuracy.;SOLUTION: An energy spectrum estimation device 92 normalizes a response function, and calculates a correction efficiency matrix from the normalized response function, a detection efficiency matrix and a measuring system correction coefficient. The calculated correction efficiency matrix, the normalized response function, and an attenuation characteristic curve supplied from a measuring circuit 30 are used to acquire a result by a Bayesian estimation expression without divergence. The energy spectrum estimation device 92 subtracts the result acquired by the Bayesian estimation expression to calculate an X-ray energy spectrum in the normalized correction efficiency matrix.;COPYRIGHT: (C)2016,JPO&INPIT