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7 March 2014 Effects of powder morphology and particle size on CT number estimates
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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.
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Jeffrey S. Kallman, Sabrina dePiero, Stephen Azevedo, and Harry E. Martz Jr. "Effects of powder morphology and particle size on CT number estimates", Proc. SPIE 9020, Computational Imaging XII, 90200K (7 March 2014); https://doi.org/10.1117/12.2048876
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