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. 2017 Nov 15;7:15622. doi: 10.1038/s41598-017-15617-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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Coronal view of a temporal maximum intensity projection visualizing part of the middle cerebral artery including the M1, M2 and M3 segments. Intensity differences from proximal to distal in a nonaffected vessel can reach up to 450 HU and higher. Vessel occlusions, vessel wall calcifications, collateral flow, clip and stent artifacts have a large influence on the continuity of intensity values along the vessel.