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. 2017 Oct 16;7:12741. doi: 10.1038/s41598-017-13077-w

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© The Author(s) 2017

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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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(a) 40-year-old man with pulmonary embolism. The CTPA performed with 120 kVp/40 ml 350 mg I/ml. Severe iodine contrast agent beam hardening artifacts in the superior vena cava (a, axial thin slice image) were observed, and 5–6 pulmonary arterial branches (b, coronal MIP image with 800 Hu-window width and 80 Hu-window center) were displayed.