Suppression of ring artefacts when tomographing anisotropically attenuating samples

Sofya Titarenko, Valeriy Titarenko, Albrecht Kyrieleis, Philip J. Withers, Francesco De Carlo

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

There are many objects for which the attenuation varies significantly as they are rotated during computerized X-ray tomography, for example plate samples. This can lead to significant ring artefacts in the subsequent tomographic reconstructions. In this paper a new method is presented that can successfully suppress such ring artefacts and is applicable to both parallel and cone-beam geometries. Rapid correction is achieved via an analytical formula which involves only a matrix-vector multiplication, for which the matrix is known and depends on a regularization parameter. The efficacy of the method is demonstrated for a paleontological sample (calcified shark cartilage) and a carbon-carbon composite/Ti-SiC metal matrix composite test sample.

Original languageEnglish
Pages (from-to)427-435
Number of pages9
JournalJournal of Synchrotron Radiation
Volume18
Issue number3
Early online date2 Apr 2011
DOIs
Publication statusPublished - 1 May 2011
Externally publishedYes

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