Boundary value problem for phase retrieval from unidirectional X-ray differential phase images
| Autor: | Gasilov, S., Mittone, A., Horng, A., Bravin, A., Baumbach, T., Geith, T., Reiser, M., Coan, P. |
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| Přispěvatelé: | Karlsruhe Intitute Technol, ANKA Synchrotron Radiat Facil, D-76344 Eggenstein, Germany, Univ Munich, Dept Phys, D-85748 Garching, Germany, Univ Munich, Inst Clin Radiol, D-81377 Munich, Germany, European Synchrotron Radiation Facility (ESRF), Gasilov, S, Mittone, A, Horng, A, Bravin, A, Baumbach, T, Geith, T, Reiser, M, Coan, P |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Optics express, 23 (10), 13294-13308 Optics Express Optics Express, Optical Society of America-OSA Publishing, 2015, 23 (10), pp.13294-13308. ⟨10.1364/OE.23.013294⟩ 'Optics Express ', vol: 23, pages: 13294-13308 (2015) |
| ISSN: | 1094-4087 |
| Popis: | International audience; 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. (C) 2015 Optical Society of America |
| Databáze: | OpenAIRE |
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