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. 2020 Jul 16;15(9):1445–1455. doi: 10.1007/s11548-020-02222-y

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© The Author(s) 2020

Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — Relative NASA TLX spread data. The ImFusion score was subtracted from the ITK-SNAP score for each participant and combined for each index to show spread of data across participants. Positive values represent a greater score for ITK-SNAP, while negative values were greater for ImFusion. The scores at the top indicate the median value, while the colours represent the software which the mean value favoured. Blue indicates a mean which favoured ImFusion labels, while red indicates a mean value which favoured ITK-SNAP