METHOD AND DEVICE FOR OBTAINING BEAM HARDENING CORRECTION COEFFICIENT FOR PERFORMING BEAM HARDENING CORRECTION ON COMPUTER TOMOGRAPHY DATA

摘要

PROBLEM TO BE SOLVED: To provide a beam hardening correction coefficient for performing beam hardening correction on computer tomography data. ! SOLUTION: A method for obtaining beam hardening correction coefficient for performing beam hardening correction on computer tomography data comprises: obtaining an original reconstructed image of an object of a specific size and an original sinogram; processing the original reconstructed image by error reduction and then obtaining an error-reduced sinogram; sampling and calculating an average of original sinograms and an average of error-reduced sinograms; optimizing the original sinogram according to the error-reduced sinogram to determine the coefficient vector of the optimization function for the object of the specific size; and fitting the coefficient vector of the optimization function of the original sinogram to obtain the beam hardening correction coefficient for the object of the specific size. ! COPYRIGHT: (C)2015,JPO&INPIT