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• W2514633178 abstract "In X-ray computed tomography (CT), the presence of metallic parts in patients causes serious artifacts and degrades image quality. Many algorithms were published for metal artifact reduction (MAR) over the past decades with various degrees of success but without a perfect solution. Some MAR algorithms are based on the assumption that metal artifacts are due only to strong beam hardening and may fail in the case of serious photon starvation. Iterative methods handle photon starvation by discarding or underweighting corrupted data, but the results are not always stable and they come with high computational cost. In this paper, we propose a high-kVp-assisted CT scan mode combining a standard CT scan with a few projection views at a high-kVp value to obtain critical projection information near the metal parts. This method only requires minor hardware modifications on a modern CT scanner. Two MAR algorithms are proposed: dual-energy normalized MAR (DNMAR) and high-energy embedded MAR (HEMAR), aiming at situations without and with photon starvation respectively. Simulation results obtained with the CT simulator CatSim demonstrate that the proposed DNMAR and HEMAR methods can eliminate metal artifacts effectively." @default.
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• W2514633178 date "2016-01-01" @default.
• W2514633178 modified "2023-10-14" @default.
• W2514633178 title "High-kVp Assisted Metal Artifact Reduction for X-Ray Computed Tomography" @default.
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• W2514633178 doi "https://doi.org/10.1109/access.2016.2602854" @default.
• W2514633178 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5119548" @default.
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