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Proceedings Paper

Effects of powder morphology and particle size on CT number estimates
Author(s): Jeffrey S. Kallman; Sabrina dePiero; Stephen Azevedo; Harry E. Martz
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Paper Abstract

We performed experiments and data analysis to determine how powder morphology and particle size affect X-ray attenuation (CT number or CTN). These experiments were performed on a CT system with an isotropic resolution of (0.15 mm)3, and an endpoint energy of 160kV. Powders with effective atomic number (Ze) within ±0.2 of water were found to have CTN more directly related to electron density than to bulk physical density. Variations in mean particle size ranging between 2 μm and 44 μm were found to have no effect on specimen mean CTN.

Paper Details

Date Published: 7 March 2014
PDF: 13 pages
Proc. SPIE 9020, Computational Imaging XII, 90200K (7 March 2014); doi: 10.1117/12.2048876
Show Author Affiliations
Jeffrey S. Kallman, Lawrence Livermore National Lab. (United States)
Sabrina dePiero, Lawrence Livermore National Lab. (United States)
Stephen Azevedo, Lawrence Livermore National Lab. (United States)
Harry E. Martz, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 9020:
Computational Imaging XII
Charles A. Bouman; Ken D. Sauer, Editor(s)

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