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. 2016 Apr 15;263:71–81. doi: 10.1007/s00415-015-7930-1

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© The Author(s) 2015

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.

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Fig. 2 — Assessment of vestibular endolymph space in a right inner ear using regions of interest (ROI). The outer ROI defines the cross-sectional area of the vestibulum at the level of the horizontal semicircular canal (“vest”). The inner ROI defines the endolymphatic space inside the vestibulum (“hyd”). a The vestibular endolymph ratio in this patient is 0.35, corresponding to mild EH. b The vestibular endolymph ratio in this patient is 0.64, corresponding to significant EH (Figure reproduced from [61])