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Tomographic reconstruction using tilted Laue analyser-based X-ray phase-contrast imaging
journal contribution
posted on 2023-05-21, 03:25 authored by Chalmers, MC, Kitchen, MJ, Uesugi, K, Falzon, G, Peter Quin, Pavlov, KMAnalyser-based phase-contrast imaging (ABPCI) is a highly sensitive phase-contrast imaging method that produces high-contrast images of weakly absorbing materials. However, it is only sensitive to phase gradient components lying in the diffraction plane of the analyser crystal [i.e. in one dimension (1-D)]. In order to accurately account for and measure phase effects produced by the wavefield-sample interaction, ABPCI and other 1-D phase-sensitive methods must achieve 2-D phase gradient sensitivity. An inclined geometry method was applied to a Laue geometry setup for X-ray ABPCI through rotation of the detector and object about the optical axis. This allowed this traditionally 1-D phase-sensitive phase-contrast method to possess 2-D phase gradient sensitivity. Tomographic datasets were acquired over 360° of a multi-material phantom with the detector and sample tilted by 8°. The real and imaginary parts of the refractive index were reconstructed for the phantom.
History
Publication title
Journal of Synchrotron RadiationVolume
28Pagination
283-291ISSN
0909-0495Department/School
Tasmanian Institute of Agriculture (TIA)Publisher
Blackwell MunksgaardPlace of publication
35 Norre Sogade, Po Box 2148, Copenhagen, Denmark, Dk-1016Rights statement
Copyright 2021 International Union of CrystallographyRepository Status
- Restricted