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Publication Detail
Beam tracking approach for single-shot retrieval of absorption, refraction and dark-field signals with laboratory x-ray sources
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.
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Dept of Med Phys & Biomedical Eng
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Dept of Med Phys & Biomedical Eng
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London Centre for Nanotechnology
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