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. 2015 Jun 26;12:15. doi: 10.1186/s12987-015-0010-1

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© Ishikawa et al. 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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 Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Perforating arteries within Virchow–Robin Spaces (VRS) in the basal ganglia in a control subject. a Axial plane volume rendering constructive interference in the steady state (CISS) image. b Fusion image of axial plane volume rendering CISS and magnetic resonance arteriography (MRA). In the basal ganglia (BG), VRS were seen as round or oval structures with irregular walls (light blue) on CISS image (a). On fusion image (b), perforating arteries (red) were noted in some VRS (white small arrows); observations in a normal 62-year-old man. 3V third ventricle, ACA anterior cerebral artery, SCA superior cerebellar artery, FR frontal horn of the lateral ventricle, MCA middle cerebral artery, SF Sylvian fissure, TH thalamus, TR trigone of the lateral ventricle, scale bar 5 mm.