optimal tube potential setting can vary depending on the Purpose: To determine the appropriate tube potential diagnostic task and can also be limited by patient size. A settings for dual-source, dual-energy data acquisition useful visualization technique for DECT is the creation across a range of phantom sizes, and to determine the of virtual mono-energetic images, which allows opti- optimal photon energies for virtual mono-energetic mization of image contrast for high atomic number imaging. materials that can be tailored to speciﬁc applications. Methods: Water phantoms (15–50-cm wide) containing Virtual mono-energetic imaging is a non-material-speci- an iodine test object were scanned on a third-generation ﬁc visualization technique that can be used to generate dual-source CT scanner using all available tube potential images having optimal contrast, optimal noise, or opti- pairs. Virtual mono-energetic images at 40, 50, 60, and mal CNR . In principle, virtual mono-energetic 70 keV were produced using Mono-energetic Plus. To imaging can reduce the beam hardening artifacts and determine the practical operating parameters for the achieve more accurate CT numbers across different pa- evaluated CT system, data exclusions were made based tient sizes . It has been shown empirically to be useful on water CT number accuracy, artifacts,
Abdominal Radiology – Springer Journals
Published: Apr 1, 2017
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