期刊
JOURNAL OF SYNCHROTRON RADIATION
卷 12, 期 -, 页码 241-245出版社
BLACKWELL MUNKSGAARD
DOI: 10.1107/S0909049504028444
关键词
phase contrast; X-ray imaging; Fresnel diffraction; analyzers; X-ray source coherence
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.
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