Improved iterative tomographic reconstruction for x-ray imaging with edge-illumination.

Abstract:

:Iterative tomographic reconstruction has been established as a viable alternative for data analysis in phase-sensitive x-ray imaging based on the edge-illumination principle. However, previously published approaches did not account for drifts of optical elements during a scan, which can lead to artefacts. Up to now, the strategy to reduce these artefacts was to acquire additional intermediate flat field images, which were used to correct the sinograms. Here, we expand the theoretical model to take these effects into account and demonstrate a significant reduction of (ring)-artefacts in the final reconstructions, while allowing for a significant reduction of scan time and dose. We further improve the model by including the capability to reconstruct combined absorption and phase contrast slices, which we experimentally demonstrate to deliver improved contrast to noise ratios compared to previously employed single shot approaches.

journal_name

Phys Med Biol

authors

Modregger P,Meganck J,Hagen CK,Massimi L,Olivo A,Endrizzi M

doi

10.1088/1361-6560/ab439d

subject

Has Abstract

pub_date

2019-10-10 00:00:00

pages

205008

issue

20

eissn

0031-9155

issn

1361-6560

journal_volume

64

pub_type

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