Abstract
Dual-energy CT represents a great leap in CT technology, with a potential for improvement of the diagnostic performance of CT in ocncologic imaging. A dual-energy CT scan entails splitting the radiation dose between two simultaneous CT acquisitions with different energies. Multiple additional series of images may be generated from a dual-energy CT scan providing new and important imaging data. Applications of dual-energy CT in head and neck tumor imaging are based on either image blending or material characterization. Image blending applications are used to improve image quality, increase lesion detectability, and decrease dental artifacts. Applications based on material characterization (iodine mapping) enable the quantitative calculation of the degree of lesion enhancement and may help in lesion characterization.
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