IMAGE CORRECTION FOR COMPUTED TOMOGRAPHY TO REMOVE CROSSTALK ARTIFACTS

摘要

A correction method and apparatus for Computed Tomography (CT) removes ring and streak artifacts from images by correcting for data contamination by crosstalk errors. Crosstalk coupling between all adjacent detectors can be measured using an off-center phantom to provide X-ray flux having a changing gradient profile from view to view across the detector array of the CT apparatus. Correction factors are found that will remove crosstalk contamination from subsequently measured imaging data.