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. 2016 Mar 15;5:328. doi: 10.1186/s40064-016-1977-z

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© Park et al. 2016

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.

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Fig. 2 — Diagram shows measurement of the carotid artery using a slanted gel pad to decrease beam-flow angle. a Diagram shows a slanted gel pad placed between the ultrasound transducer and skin which is decreasing the beam-flow angle. b As the skin and soft tissue is slightly elastic the probe and slanted gel pad can be tilted and compressed against the neck during measurement to further decrease beam-flow angle. This technique was left to the radiologists to perform according to personal preferences