X-RAY CT DEVICE, CALCURATION DEVICE, RECORDING MEDIUM FOR X-RAY CT DEVICE, AND MAINTENANCE METHOD FOR X-RAY CT DEVICE

摘要

X-ray CT equipment prevents the effect of the hardening of CT number quantitative performance X-ray beam caused by deterioration (BH). A kind of X-ray absorption characteristic (sulphur), find that preparatory target value T and (therefore) are saved by emulation, simulation value (sulphur) is modified to be to correct using the maintenance measurement BH for obtaining required basic data using data for projection, BH correction factors come calculate using after X-ray absorption characteristic (sulphur) and target value). BH accuracy improve have few actual measured value mistaken diagnosis inhomogeneities caused by CT number can be reduced, and improve diagnosis performance meet improve quantitative performance CT number can be realized.