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Title:

Anisotropic X-Ray Dark-Field Tomography: A Continuous Model and its Discretization

Document type:
Zeitschriftenaufsatz
Author(s):
Wieczorek, M.; Schaff, F.; Pfeiffer, F.; Lasser, T.
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 resu...     »
Keywords:
CAMP,MedicalImaging,Reconstruction,XTT,AXDT
Journal title:
Phys. Rev. Lett.
Year:
2016
Journal volume:
117
Pages contribution:
158101
Publisher:
American Physical Society
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