The signal intensity ratio of the optic nerve to ipsilateral frontal white matter is of value in the diagnosis of acute optic neuritis. Onodera M, Yama N, Hashimoto M, Shonai T, Aratani K, Takashima H, Kamo K-I, Nagahama H, Ohguro H, Hatakenaka M Eur Radiol. 2015 Nov 25. Epub 2015 Nov 25. PMID: 26607576. Abstract CommentRecommendBookmarkWatch