1.
Opt Express
; 21(24): 29101-8, 2013 Dec 02.
Article
in English
| MEDLINE
| ID: mdl-24514461
ABSTRACT
We present a spectral phase unwrapping approach for grating-based differential phase-contrast data where the unwrapped interferometer phase shift is estimated from energy discriminated measurements using maximum likelihood principles. We demonstrate the method on tomographic data sets of a test specimen taken at different x-ray energies using synchrotron radiation. The proposed unwrapping technique was demonstrated to successfully correct the data set for phase wrapping.