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Diffraction tomography and Rietveld refinement of a hydroxyapatite bone phantom
Author(s) -
Frølich S.,
Leemreize H.,
Jakus A.,
Xiao X.,
Shah R.,
Birkedal H.,
Almer J. D.,
Stock S. R.
Publication year - 2016
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576715022633
Subject(s) - materials science , crystallite , diffraction , rietveld refinement , imaging phantom , lattice constant , monochromatic color , x ray crystallography , powder diffraction , diffraction tomography , beamline , optics , tomography , crystallography , beam (structure) , physics , chemistry , metallurgy
A model sample consisting of two different hydroxyapatite (hAp) powders was used as a bone phantom to investigate the extent to which X‐ray diffraction tomography could map differences in hAp lattice constants and crystallite size. The diffraction data were collected at beamline 1‐ID, the Advanced Photon Source, using monochromatic 65 keV X‐radiation, a 25 × 25 µm pinhole beam and translation/rotation data collection. The diffraction pattern was reconstructed for each volume element (voxel) in the sample, and Rietveld refinement was used to determine the hAp lattice constants. The crystallite size for each voxel was also determined from the 00.2 hAp diffraction peak width. The results clearly show that differences between hAp powders could be measured with diffraction tomography.