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URN: urn:nbn:de:swb:90-482675

Boundary value problem for phase retrieval from unidirectional X-ray differential phase images

Gasilov, S.; Mittone, A.; Horng, A.; Bravin, A.; Baumbach, T.; Geith, T.; Reiser, M.; Coan, P.

Abstract:
The phase retrieval problem can be reduced to the second order partial differential equation. In order to retrieve the absolute values of the X-ray phase and to minimize the reconstruction artifacts we defined the mixed inhomogeneous boundary condition using available a priori information about the sample. Finite element technique was used to solve the boundary value problem. The approach is validated on numerical and experimental phantoms. In order to demonstrate a possible application of the method, we have processed an entire tomographic set of differential phase images and estimated the magnitude of the refractive index decrement for some tissues inside complex biomedical samples.


Zugehörige Institution(en) am KIT ANKA - die Synchrotronstrahlungsquelle am KIT (ANKA)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator ISSN: 1094-4087
KITopen ID: 1000048267
HGF-Programm 55.51.10; LK 02
Erschienen in Optics express
Band 23
Heft 10
Seiten 13294-13308
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
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