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. 2022 Jul 20;12:12422. doi: 10.1038/s41598-022-16798-9

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, 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 changes were made. 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/4.0/.

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Images of filtered back projection (FBP) at 10 (a), 25 (b), 50 (c), and 175 mAs (g) and True Fidelity Image (TFI) at 10 (d), 25 (e), and 50 mAs (f) of cadaveric lung (diffuse alveolar hemorrhage). We set ROI of the same size at the same location on the selected FBP and TFI images in background air. The SD values of each image are presented. The SD values of 25 mAs-TFI were almost the same as that of 17 5 mAs-FBP.