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. 2018 Aug 11;4(3):2055217318791196. doi: 10.1177/2055217318791196

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© The Author(s) 2018

Creative Commons Non Commercial CC BY-NC: This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 1. — Orbital magnetic resonance imaging (MRI) protocol and segmentations.

The orbital MRI findings were evaluated using 3-Tesla MRI (Philips, Ingenia). (a)–(c) Optic nerves are divided into the following five segments: intraorbital, canalicular, prechiasmal, chiasmal, and optic tract. The T2-weighted image with fat-suppression technique was used for evaluating signal intensity and diameter of the optic nerve. The optic nerves were measured at (d) mid-part of the intraorbital segment, (e) canalicular segment and (f) prechiasmatic segment, and (g) optic nerve enhancement is demonstrated on a T1-weighted image postcontrast study with fat-suppression techniques at the intraorbital part of the right optic nerve.