Improved visualization of X-ray phase contrast volumetric data through artifact-free integrated differential images

Lorenzo Massimi; Savvas Savvidis; Marco Endrizzi; Alessandro Olivo

doi:10.1016/j.ejmp.2021.03.024

Improved visualization of X-ray phase contrast volumetric data through artifact-free integrated differential images

Phys Med. 2021 Apr:84:80-84. doi: 10.1016/j.ejmp.2021.03.024. Epub 2021 Apr 18.

Authors

Lorenzo Massimi¹, Savvas Savvidis², Marco Endrizzi², Alessandro Olivo²

Affiliations

¹ Department of Medical Physics and Biomedical Engineering, University College London, Gower St, London WC1E 6BT, UK. Electronic address: l.massimiphd@gmail.com.
² Department of Medical Physics and Biomedical Engineering, University College London, Gower St, London WC1E 6BT, UK.

PMID: 33878654
DOI: 10.1016/j.ejmp.2021.03.024

Abstract

Artifacts arising when differential phase images are integrated is a common problem to several X-ray phase-based experimental techniques. The combination of noise and insufficient sampling of the high-frequency differential phase signal leads to the formation of streak artifacts in the projections, translating into poor image quality in the tomography slices. In this work, we apply a non-iterative integration algorithm proven to reduce streak artifacts in planar (2D) images to a differential phase tomography scan. We report on how the reduction of streak artifacts in the projections improves the quality of the tomography slices, especially in the directions different from the reconstruction plane. Importantly, the method is compatible with large tomography datasets in terms of computation time.

Keywords: Differential phase integration; Edge illumination; X-ray phase contrast tomography.

MeSH terms

Algorithms
Artifacts*
Image Processing, Computer-Assisted
Phantoms, Imaging
Tomography
Tomography, X-Ray Computed*
X-Rays