Removing ring artefacts from synchrotron radiation-based hard x-ray tomography data

Peter Thalmann; Christos Bikis; Georg Schulz; Pierre Paleo; Alessandro Mirone; Alexander Rack; Stefan Siegrist; Emre Cörek; Jörg Huwyler; Bert Müller

doi:10.1117/12.2274236

26 September 2017 Removing ring artefacts from synchrotron radiation-based hard x-ray tomography data

Peter Thalmann, Christos Bikis, Georg Schulz, Pierre Paleo, Alessandro Mirone, Alexander Rack, Stefan Siegrist, Emre Cörek, Jörg Huwyler, Bert Müller

Author Affiliations +

Proceedings Volume 10391, Developments in X-Ray Tomography XI; 1039114 (2017) https://doi.org/10.1117/12.2274236
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

In hard X-ray microtomography, ring artefacts regularly originate from incorrectly functioning pixel elements on the detector or from particles and scratches on the scintillator. We show that due to the high sensitivity of contemporary beamline setups further causes inducing inhomogeneities in the impinging wavefronts have to be considered. We propose in this study a method to correct the thereby induced failure of simple flatfield approaches. The main steps of the pipeline are (i) registration of the reference images with the radiographs (projections), (ii) integration of the flat-field corrected projection over the acquisition angle, (iii) high-pass filtering of the integrated projection, (iv) subtraction of filtered data from the flat-field corrected projections. The performance of the protocol is tested on data sets acquired at the beamline ID19 at ESRF using single distance phase tomography.

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Peter Thalmann, Christos Bikis, Georg Schulz, Pierre Paleo, Alessandro Mirone, Alexander Rack, Stefan Siegrist, Emre Cörek, Jörg Huwyler, and Bert Müller "Removing ring artefacts from synchrotron radiation-based hard x-ray tomography data", Proc. SPIE 10391, Developments in X-Ray Tomography XI, 1039114 (26 September 2017); https://doi.org/10.1117/12.2274236

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KEYWORDS

Digital filtering

Linear filtering

Tomography

Hard x-rays

Image filtering

Image quality

Image registration

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