Patent Document ID: 20160225169
Application ID: 14917611
Patent Flag: 0

Claim One:
1. A CT image processing method, including the following steps of: receiving projection data acquired of a volume along a scan direction, one or more image points of said volume reconstructable, in an iterative reconstruction operation, from at least a part of said projection data; as a function of a position in a volume reconstructed in a previous iteration or otherwise reconstructed, computing a regularization parameter for an image point at said position for a next iteration in said iterative reconstruction operation; as a function of a scan position along the scan direction, normalizing the regularization parameter relative to a region of interest, ROI, of an object in a plane across the volume at said scan position, the ROI defined by a mask m, wherein the normalizing is via a mean or a weighted mean of the regularization parameter; when iteratively reconstructing, in said next iteration, said image point from the projection data, applying said normalized regularization parameter.