Phase-contrast X-ray imaging combining free space propagation and Bragg diffraction.
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.
Coan
Paola
P
European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP 220, 38043 Grenoble Cedex, France. coan@esrf.fr
Pagot
Elodie
E
Fiedler
Stefan
S
Cloetens
Peter
P
Baruchel
José
J
Bravin
Alberto
A
D000042:Absorption; D003460:Crystallization; D011108:Polymers / Q000737:chemistry; D011856:Radiographic Image Enhancement / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted; D017356:Synchrotrons
D011108:Polymers