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Korean J Radiol. 2012 Mar-Apr;13(2):237-9. doi: 10.3348/kjr.2012.13.2.237. Epub 2012 Mar 7.

Diffusion MR imaging of postoperative bilateral acute ischemic optic neuropathy.

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  • 1Department of Radiology, Chungnam National University School of Medicine, Daejeon, Korea.


A 57-year-old woman experienced bilateral acute ischemic optic neuropathy after spine surgery. Routine MR imaging sequence, T2-weighted image, showed subtle high signal intensity on bilateral optic nerves. A contrast-enhanced T1 weighted image showed enhancement along the bilateral optic nerve sheath. Moreover, diffusion-weighted image (DWI) and an apparent diffusion coefficient map showed markedly restricted diffusion on bilateral optic nerves. Although MR findings of T2-weighted and contrast enhanced T1-weighted images may be nonspecific, the DWI finding of cytotoxic edema of bilateral optic nerves will be helpful for the diagnosis of acute ischemic optic neuropathy after spine surgery.


Diffusion magnetic resonance imaging; Optic neuropathy, ischemic

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