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. 2019 Dec 21;19:89. doi: 10.1186/s40644-019-0276-7

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© The Author(s). 2019

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 — Segmentation of volume of interest and differences in processing: (a) Example illustrating the VOI in a single slice of tumor delineated by the radiologists (indicated in yellow); (b) Corresponding drawing of partial enlargement under diverse operations (indicated in blue). Erosion represents erosion operation on VOIs while Smoothing represents smoothing operation. Dilation, Dilation5, and Dilation7 indicate dilation operation, for which the size of structural elements is set as 3, 5, and 7, respectively. Application of various operations to VOIs slice-by-slice corresponds to diverse delineations