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research article

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

Pfeiffer, F.  
•
Weitkamp, T.
•
Bunk, O.
Show more
2006
Nature Physics

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. This is resolved at highly brilliant X-ray synchrotron or micro-focus sources by using phase-sensitive imaging methods to improve the contrast. However, the requirements of the illuminating radiation mean that hard-X-ray phase-sensitive imaging has until now been impractical with more readily available X-ray sources, such as X-ray tubes. In this letter, we report how a setup consisting of three transmission gratings can efficiently yield quantitative differential phase-contrast images with conventional X-ray tubes. In contrast with existing techniques, the method requires no spatial or temporal coherence, is mechanically robust, and can be scaled up to large fields of view. Our method provides all the benefits of contrast-enhanced phase-sensitive imaging, but is also fully compatible with conventional absorption radiography. It is applicable to X-ray medical imaging, industrial non-destructive testing, and to other low-brilliance radiation, such as neutrons or atoms

  • Details
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Type
research article
DOI
10.1038/nphys265
Author(s)
Pfeiffer, F.  
Weitkamp, T.
Bunk, O.
David, C.
Date Issued

2006

Published in
Nature Physics
Volume

2

Issue

4

Start page

258

End page

261

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSXC  
Available on Infoscience
October 11, 2007
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/12841
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