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Superior techniques for eliminating ring artifacts in X-ray micro-tomography

Posted on 2018-10-17 - 19:34
Synchrotron-based X-ray micro-tomography systems often suffer severe ring artifacts in the reconstructed images. In the sinograms the artifacts appear as straight lines or stripe artifacts. These artifacts are caused by the irregular response of the detecting system giving rise to a variety of observed types of stripes: Full stripes, partial stripes, fluctuating stripes, and unresponsive stripes. The use of pre-processing techniques such as distortion correction or phase retrieval blurs and enlarges these stripes. It is impossible for a single approach to remove all types of stripe artifacts. Here, we propose three techniques for tackling all of them. The proposed techniques are easy to implement; do not generate extra stripe artifacts and void-center artifacts; and give superior quality on challenging datasets and in comparison with other techniques. The implementation in Python codes and a challenging dataset are available for download.

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AUTHORS (3)

Nghia Vo
Robert Atwood
Michael Drakopoulos
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