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Suppression of ring artefacts when tomographing anisotropically attenuating samples

DOI: 10.1107/S0909049511006005 DOI Help
PMID: 21525651 PMID Help

Authors: Sofya Titarenko (University of Manchester/UMIST) , Valeriy Titarenko (University of Manchester/UMIST) , Albrecht Kyrieleis (University of Manchester/UMIST) , Philip Withers (University of Manchester) , Francesco De Carlo (Argonne National Laboratory)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Synchrotron Radiation , VOL 18 (3) , PAGES 427-435

State: Published (Approved)
Published: April 2011

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.

Subject Areas: Technique Development


Instruments: B16-Test Beamline

Other Facilities: Advanced Photon Source