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. 2021 Dec 20;12:787083. doi: 10.3389/fphys.2021.787083

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Copyright © 2021 Malik, Delhaas, Spronck, Henry, Joseph, Stehouwer, Mess and Reesink.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Fast B-mode ultrasound recording of the common carotid artery with the 17 M-lines indicated. The middle M-line (no. 9) was selected as a proxy for a single M-line device and is indicated by dashed (yellow) lines.