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. 2018 Nov 12;13:219. doi: 10.1186/s13014-018-1163-2

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© The Author(s). 2018

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. 2 — Each lesion is represented as a diamond for lung lesions and a square for involved lymph nodes. Th_opt, the optimal threshold to be applied for delineation is expressed as a linear regression such as Th_opt = A.[ln (1/SUV_max)] + B of the maximum standard uptake value (SUV_max). The expression of Th_opt for lung lesions and lymph nodes are presented with their respective coefficient of determination R²