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. 2018 Dec 17;8:17888. doi: 10.1038/s41598-018-36191-9

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© The Author(s) 2018

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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Multifrequency SWS compounding. (a) Raw wave images at six excitation frequencies. White lines demarcate wave fronts to illustrate the approximate lengths of half-waves. (b) Single-frequency elastograms (SWS maps) obtained after wave-gradient based inversion⁴⁴. (c) Representative B-mode image (left hand side) and final elastograms (SWS map, right hand side) which was generated from the six single-frequency SWS maps shown in (b).