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Proceedings Paper

Experimental validation of a multi-step material decomposition method for spectral CT
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Paper Abstract

Recently, we proposed a multi-step material decomposition method for spectral CT where the decomposition is solved in a series of steps each separating one new material from the original attenuation data. Until now, this method has only been tested using numerical simulations of multi-material digital phantoms. Here we present the initial results of the multistep method applied to experimental data acquired in our laboratory using a Medipix 3RX detector with a silicon senor. The decomposition of CT images of a 3-material phantom is demonstrated. The materials studied here are gadolinium (Gd), iodine (I) and acrylonitrile butadiene styrene (ABS) plastic. The results show qualitative and quantitative improvement in separation accuracy as the worst-case percent error in one selected slice is reduced by 51.7% when using our new method in comparison to a conventional single-step material decomposition.

Paper Details

Date Published: 3 April 2019
PDF: 8 pages
Proc. SPIE 10948, Medical Imaging 2019: Physics of Medical Imaging, 109482T (3 April 2019); doi: 10.1117/12.2513503
Show Author Affiliations
Nathaniel R. Fredette, Univ. of Houston (United States)
Stefano Vespucci, Univ. of Houston (United States)
Mini Das, Univ. of Houston (United States)

Published in SPIE Proceedings Vol. 10948:
Medical Imaging 2019: Physics of Medical Imaging
Taly Gilat Schmidt; Guang-Hong Chen; Hilde Bosmans, Editor(s)

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