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Letter

Nature Physics 2, 258–261 (1 April 2006) | doi:10.1038/nphys265

Phase retrieval and differential phase-contrast imaging with low-brilliance X-ray sources

Franz Pfeiffer , Timm Weitkamp , Oliver Bunk & Christian David

X-ray radiographic absorption imaging is an invaluable tool in medical diagnostics and materials science. For biological tissue samples, polymers or fibre composites, however, the use of conventional X-ray radiography is limited due to their weak absorption.