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Proceedings Paper

Dual kVp material decomposition using flat-panel detectors
Author(s): Deborah J. Walter; Xiaoye Wu; Yanfeng Du; J. Eric Tkaczyk; William R. Ross
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Paper Abstract

In addition to a conventional Computed Tomography (CT) image, dual energy (dual kVp) imaging can be used to generate an image of the same anatomy that represents the equivalent density of a particular material, for example, calcium, iodine, water, etc. This image can be used to improve the differentiation of materials as well as improve the accuracy of absolute density measurements in a cross-sectional image. It is important to understand the certainty of the estimation of the density of the material. Both simulations and measurements are used to quantify these errors. Data are acquired using a flat-panel based volumetric CT system, by taking two scans and adjusting the maximum energy of the source spectrum (kVp). Physics based simulations are used to compare with the measurements. After validating the simulation algorithms, the accuracy of the dual kVp method is determined using the simulations in a perturbation study.

Paper Details

Date Published: 6 May 2004
PDF: 11 pages
Proc. SPIE 5368, Medical Imaging 2004: Physics of Medical Imaging, (6 May 2004); doi: 10.1117/12.534372
Show Author Affiliations
Deborah J. Walter, GE Global Research Ctr. (United States)
Xiaoye Wu, GE Global Research Ctr. (United States)
Yanfeng Du, GE Global Research Ctr. (United States)
J. Eric Tkaczyk, GE Global Research Ctr. (United States)
William R. Ross, GE Global Research Ctr. (United States)

Published in SPIE Proceedings Vol. 5368:
Medical Imaging 2004: Physics of Medical Imaging
Martin J. Yaffe; Michael J. Flynn, Editor(s)

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