Correction Coefficient Calculation Method For X-Ray CT Systems, Beam Hardening Post-Processing Method Therefore And X-Ray CT System

摘要

An object of the present invention is to calculate a more accurate beam- hardening correction coefficient. A phantom having an oblong section or a phantom having an annular (sector) section and a uniform thikness is positioned in an X-ray CT system, and scanned from plural directions in order to acquire a plurality of views. The results of the scan are used to calculate a correction coefficient that is used to correct projection information to be acquired from a subject.