Iterative CT reconstruction method using multi-modal edge information

摘要

A computed tomography (CT) reconstruction method includes implementing an iterative image reconstruction process for CT metrology of an object, wherein the iterative reconstruction process (300) utilizes accurate forward projection (302). During each of a plurality of iterations, a reconstructed image (206) is constrained by utilizing prior outer edge information obtained from a modality in addition to CT, and then transformed to a projection domain so as to generate a calculated sinogram (202). A correction image (210) is determined based on the calculated sinogram (202) and a measured sinogram.