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. 2019 Oct 23;16(159):20190572. doi: 10.1098/rsif.2019.0572

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© 2019 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 3. — Examples of the cross-sections of PVSs (green) around arteries (red), observed in vivo. (a) Pial artery (from [21]). (b) Penetrating artery (adapted from [40]). The white lines show fits to a simple, adjustable geometric model of the cross-section of the PVS, consisting of an elliptical outer wall and a circular artery (from Tithof et al. [25]). (Online version in colour.)