| 摘要 |
<p>In a method and apparatus (100) for progressive correction of ring artifacts in a computed tomography system (102), multiple-channel ring artifacts are mitigated or eliminated along with single-channel ring artifacts. Detector channels (22) are iteratively (106-114) grouped (114) into various size groupings, for example, pairs, and the offset error values of each detector channel grouping are determined. The error values corresponding to each detector channel are accumulated (116) at each iteration, and the final accumulated values (118) are applied to captured projection data (100). In this manner, ring artifacts can be eliminated from the image in just a few iterations.</p> |
