6 May 2004 Dual kVp material decomposition using flat-panel detectors
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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.
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Deborah J. Walter, Deborah J. Walter, Xiaoye Wu, Xiaoye Wu, Yanfeng Du, Yanfeng Du, J. Eric Tkaczyk, J. Eric Tkaczyk, William R. Ross, William R. Ross, } "Dual kVp material decomposition using flat-panel detectors", Proc. SPIE 5368, Medical Imaging 2004: Physics of Medical Imaging, (6 May 2004); doi: 10.1117/12.534372; https://doi.org/10.1117/12.534372
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