Two-shot X-ray dark-field imaging

In this article, we report on a novel acquisition scheme for time- and dose-saving retrieval of dark-field data in grating-based phase-contrast imaging. In comparison to currently available techniques, the proposed approach only requires two phase steps. More importantly, our method is capable of ac...

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Bibliographic Details
Published in:Optics express 2016-11, Vol.24 (23), p.27032-27045
Main Authors: Marschner, M, Birnbacher, L, Mechlem, K, Noichl, W, Fehringer, A, Willner, M, Scherer, K, Herzen, J, Noël, P B, Pfeiffer, F
Format: Article
Language:English
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Summary:In this article, we report on a novel acquisition scheme for time- and dose-saving retrieval of dark-field data in grating-based phase-contrast imaging. In comparison to currently available techniques, the proposed approach only requires two phase steps. More importantly, our method is capable of accurately retrieving the dark-field signal where conventional approaches fail, for instance in the case of very low photon statistics. Finally, we successfully extend two-shot dark-field imaging to tomographic investigations, by implementing an iterative reconstruction with appropriate weights. Our results indicate an important progression towards the clinical feasibility of dark-field tomography.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.24.027032