Department of Radiology, Chungnam National University School of Medicine, Daejeon, Korea.
Korean J Radiol. 2012 Mar-Apr;13(2):237-9. doi: 10.3348/kjr.2012.13.2.237. Epub 2012 Mar 7.
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.
一位 57 岁女性在脊柱手术后出现双侧急性缺血性视神经病变。常规磁共振成像序列 T2 加权像显示双侧视神经信号轻度增高。增强 T1 加权像显示双侧视神经鞘沿视神经强化。此外，弥散加权成像（DWI）和表观弥散系数图显示双侧视神经弥散受限明显。虽然 T2 加权和增强 T1 加权成像的磁共振表现可能无特异性，但双侧视神经细胞毒性水肿的 DWI 表现有助于诊断脊柱手术后急性缺血性视神经病变。
