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. 2016 Jul 13;17:48. doi: 10.1186/s12868-016-0282-7

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© The Author(s) 2016

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 — A 3D view of segmented bulbs in a subject with open eyes. x/y/z coordinates appear in NIFTI format; the black thick line in each bulb is the maximum length vector. The horizontal (β, between length vector and the x-axis) and vertical (α, between length vector and the y-axis) angles are shown