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

Journal Article · Mon Jun 01 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4922189· OSTI ID:22413628

Diemoz, Paul C.; Olivo, Alessandro ^[1]; Kallon, Gibril K. N.; Basta, Dario; Endrizzi, Marco ^[1]; Robinson, Ian K. ^[2]

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1. Department of Medical Physics and Biomedical Engineering, University College London, Malet Place, Gower Street, London WC1E 6BT (United Kingdom)
2. Research Complex at Harwell, Harwell Oxford Campus, OX11 0FA Didcot (United Kingdom)

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.

• OSTI ID: 22413628
• Journal Information: Applied Physics Letters, Vol. 106, Issue 22; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BIOMEDICAL RADIOGRAPHY
INTERPOLATION
PHOTON BEAMS
REFRACTION
SYNCHROTRON RADIATION
X RADIATION
X-RAY SOURCES