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. 2016 Oct 13;6:35083. doi: 10.1038/srep35083

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Copyright © 2016, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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Different types of images of a normal liver and livers with mild and severe NAFLD: (a) ultrasound B-mode images, (b) texture-feature images, (c) ultrasound signal-to-noise ratio (SNR) images, and (d) ultrasound center-frequency downshift (CFDS) images. The white square and white line delineating the region of interest were manually traced by the physician. AC: autocorrelation; SA: sum average; SV: sum variance.