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. 2017 Sep 11;7:11141. doi: 10.1038/s41598-017-11747-3

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© The Author(s) 2017

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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Test-retest reliability of 1.75 mm isotropic voxel diffusion kurtosis imaging. Panels a–c show the Bland-Altman plots for AK, RK, and MK from one of the participants including the 95% confidence interval for the agreement between scan 1 and scan 2. Each symbol represents a white matter region of interest from the DTI Studio parcellation. Panels d–f show the difference in coefficient of variations (CoVs) for AK, RK, and MK between controls and TBI as well as the overall mean CoV for each diffusion tensor metric. Panels g–i show the slopes of the relationship between z-axis centers and test-retest differences. Panels j–o shows the slopes and R²s including standard deviation for the linear relationships between the AK, MK, and RK and atlas-based white matter tracts in z-axis for controls and TBI separately. Abbreviations: TBI; traumatic brain injury; AK, axial kurtosis; RK, radial kurtosis; MK, mean kurtosis.