Anisotropic X-Ray Dark-Field Tomography: A Continuous Model and its Discretization
Wieczorek M, Schaff F, Pfeiffer F, Lasser T (2016)
Publication Type: Journal article
Publication year: 2016
Journal
Book Volume: 117
Article Number: 158101
Journal Issue: 15
DOI: 10.1103/PhysRevLett.117.158101
Abstract
The x-ray dark-field signal measured in grating interferometers is anisotropic, depending on both the beam direction and the grating orientation with respect to the sample. We present a novel general closed-form, continuous forward model of the anisotropic dark-field signal. Furthermore, we derive a discretization using spherical harmonics, leading to a large-scale linear inverse problem. We present first experimental results of a wooden sample, demonstrating marked advantages over previous results, in particular, the resolution of multiple scattering directions in one volume element.
Involved external institutions
Germany (DE)How to cite
APA:
Wieczorek, M., Schaff, F., Pfeiffer, F., & Lasser, T. (2016). Anisotropic X-Ray Dark-Field Tomography: A Continuous Model and its Discretization. Physical Review Letters, 117(15). https://doi.org/10.1103/PhysRevLett.117.158101
MLA:
Wieczorek, M., et al. "Anisotropic X-Ray Dark-Field Tomography: A Continuous Model and its Discretization." Physical Review Letters 117.15 (2016).
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