Phase-contrast X-ray imaging combining free space propagation and Bragg diffraction

J Synchrotron Radiat. 2005 Mar;12(Pt 2):241-5. doi: 10.1107/S0909049504028444. Epub 2005 Feb 22.

Abstract

The combination of X-ray 'propagation-based' and 'analyzer-based' phase-contrast imaging with a perfect crystal-analyzer is investigated. The image pattern produced using this 'hybrid' imaging technique presents peculiar features that can be interpreted as a mixture of the two independent phase-contrast signals. A quantitative analysis has been performed in terms of signal-to-noise ratio for the three techniques considered in this paper. Results show that in the 'hybrid imaging' technique this parameter has a weaker dependence on the angular alignment of the crystal analyser with respect to the 'analyser-based' imaging. This pioneering experiment indicates that this hybrid imaging technique might permit simultaneous advantage of the specific features of the two imaging methods to be taken.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Absorption
  • Crystallization
  • Polymers / chemistry
  • Radiographic Image Enhancement / instrumentation*
  • Signal Processing, Computer-Assisted
  • Synchrotrons*

Substances

  • Polymers