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. 2025 Nov 11;25:459. doi: 10.1186/s12880-025-01972-y

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© The Author(s) 2025

Open Access This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits any non-commercial use, sharing, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if you modified the licensed material. You do not have permission under this licence to share adapted material derived from this article or parts of it. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by-nc-nd/4.0/.

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Fig. 5 — (a) FBP image shows the dark and bright artifact from the metal coil. (b) The NMAR method can reduces metal artifacts, but produces the most new artifacts than other methods (arrow). (c) The O-MAR method can reduce metal artifacts, but produces new artifacts (arrow). (c) The PISC method cannot reduce metal artifacts. (d) The CNN-MAR method significantly reduces metal artifacts, but produces new artifacts (arrow). (e) The DuDoNet method significantly reduces metal artifact, but produces an undesirable over-smoothing effect