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. 2017 Nov 25;9(4):417–425. doi: 10.1007/s12975-017-0590-y

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© The Author(s) 2017

Open Access This 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.

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Fig. 4 — Filament visualization on MRI during MCAO: the examples of incorrect filament position with persistent blood flow in the right MCA. a The filament tip inserted insufficiently deep and visualized as elongated hypointense zone inside the distal part of ICA below the origin of MCA on hrT1wi and as the absence of blood flow in the distal part of the ICA on MIP hrT1wi (blue line on scheme). The right MCA is hypertensive on hrT1wi due to the of retrograde blood flow from ACA. b Excessively deep filament insertion into ACA is visualized as elongated hypointense zone inside the A1 segment of ACA on hrT1wi and as the absence of blood flow in the A1 segment of ACA on MIP hrT1wi (blue line on scheme). The right MCA is also hypertensive on hrT1wi due to direct blood supply from the ICA