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

Christos Bikis , Georg Schulz , Pierre Paleo (1) , Alessandro Mirone (1) , Alexander Rack (1) , Bert Müller , Peter Thalmann , Stefan Siegrist , Emre Cörek , Jörg Huwyler

1 ESRF - European Synchrotron Radiation Facility

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. © (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only

Domaines: Instrumentations et Détecteurs [physics.ins-det]

Christos Bikis, Georg Schulz, Pierre Paleo, Alessandro Mirone, Alexander Rack, et al.. Removing ring artefacts from synchrotron radiation-based hard x-ray tomography data. SPIE Conference on Optics and Photonics, Aug 2017, San Diego, United States. pp.1039114, ⟨10.1117/12.2274236⟩. ⟨hal-01815229⟩