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. 2020 Apr 16;10:6544. doi: 10.1038/s41598-020-63529-z

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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In vivo ultrasound imaging of the wrist of a human volunteer, obtained with the MEMS-US-HH (handheld) system. Cross-sectional B-mode images of the human wrist (a) in relaxation and (b) in compression. M-mode images of (c) the radial artery, (d) the vein, and (e) the line A-A’. (f) The power spectrum of the line B-B’. All scale bars are 3 mm. Red and blue lines in (c,d) indicate compression and relaxation, respectively.