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. 2017 Aug 8;18:265. doi: 10.1186/s12882-017-0679-2

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© The Author(s). 2017

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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Representative images of elasticity measurement by shear wave elastography (SWE) in one kidney. The regions of interest (ROIs) were positioned in the cortex, medulla and sinus of the mid-portion and in the cortex of the lower pole using the B-mode image. The lower and upper rows show the changes in the ROI by grey-scale ultrasound and SWE, respectively. The colour map is the distribution of elasticity values scaled from 0 to 180 kPa and calculated from shear wave velocity (SWV) values using Young’s modulus (YM)