Effects of powder morphology and particle size on CT number estimates

Jeffrey S. Kallman; Sabrina dePiero; Stephen Azevedo; Harry E. Martz Jr.

doi:10.1117/12.2048876

7 March 2014 Effects of powder morphology and particle size on CT number estimates

Jeffrey S. Kallman, Sabrina dePiero, Stephen Azevedo, Harry E. Martz Jr.

Proceedings Volume 9020, Computational Imaging XII; 90200K (2014) https://doi.org/10.1117/12.2048876
Event: IS&T/SPIE Electronic Imaging, 2014, San Francisco, California, United States

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.

Citation Download Citation

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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