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Beam tracking approach for single-shot retrieval of absorption, refraction, and dark-field signals with laboratory x-ray sources

Vittoria, FA; Kallon, GKN; Basta, D; Diemoz, PC; Robinson, IK; Olivo, A; Endrizzi, M; (2015) Beam tracking approach for single-shot retrieval of absorption, refraction, and dark-field signals with laboratory x-ray sources. APPLIED PHYSICS LETTERS , 106 (22) , Article 224102. 10.1063/1.4922189. Green open access

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Abstract

We present the translation of the beam tracking approach for x–ray phase–contrast and dark–field imaging, recently demonstrated using synchrotron radiation, to a laboratory setup. A single absorbing mask is used before the sample, and a local Gaussian interpolation of the beam at the detector is used to extract absorption, refraction, and dark–field signals from a single exposure of the sample. Multiple exposures can be acquired when high resolution is needed, as shown here. A theoretical analysis of the effect of polychromaticity on the retrieved signals, and of the artifacts this might cause when existing retrieval methods are used, is also discussed.

Type: Article
Title: Beam tracking approach for single-shot retrieval of absorption, refraction, and dark-field signals with laboratory x-ray sources
Open access status: An open access version is available from UCL Discovery
DOI: 10.1063/1.4922189
Publisher version: http://dx.doi.org/10.1063/1.4922189
Additional information: Copyright © 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.4922189]
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/1468893
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