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. 2018 Nov 9;18(2):150–157. doi: 10.2463/mrms.mp.2018-0004

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© 2018 Japanese Society for Magnetic Resonance in Medicine

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/

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Fig. 1. — ROI-based fractional anisotropy (FA) measurement in a 33-year old male volunteer. For the assessment of nerve structure integrity FA values were measured with MITK diffusion toolkit (German Cancer Research Center, Heidelberg, Germany; www.mitk.org). In the trace image (a) an ROI, in diameter adjusted to the cross-sectional area of the nerve structure, was placed in the trunk just distally of the nerve root ganglion. The ROI was then registered to the corresponding FA map (b) in order to extract the FA value.