Method and device for obtaining beam hardening correction factor for performing beam hardening correction on computed tomography data

摘要

The invention provides a method and device for acquiring beam hardening correction parameters for performing beam hardening correction on computer tomography data. The method includes firstly according to an object of the specific size, acquiring original reconstructed images and original sinograms; acquiring error-reduced sinograms by reducing the errors of the original reconstructed images; sampling and calculating the average value of the original sinograms and the average value of the error-reduced sinograms; optimizing the original sinograms according to the original sinograms to determine the parameter vectors of the optimization function of the object of the specific size; finally fitting the parameter vectors of the optimization function of the original sinograms, and acquiring the beam hardening correction parameters of the object of the specific size.