Service de neurologie, faculté de médecine, CHU de Reims, URCA, 45, rue Cognacq-Jay, 51100 Reims, France.
Rev Neurol (Paris). 2012 Oct;168(10):702-5. doi: 10.1016/j.neurol.2012.07.012. Epub 2012 Sep 13.
Magnetic resonance imaging is the modality of choice to investigate patients with central nervous system diseases. In patients with optic neuritis, early MRI allows positive and differential diagnosis, and gives arguments for prognosis. The technique should be adapted for the exploration of visual pathways. Inflammatory optic neuritis is characterized by an early signal abnormality within the optic nerve, whereas optic nerve MRI is normal in the early phase of ischemic optic neuropathy. MRI also detects compressive and infiltrative lesions. Meningiomas are characterized by abnormalities within the peri-optical spaces, whereas a global increase in the size of the optic nerve is in favor of a glioma.
磁共振成像是研究中枢神经系统疾病患者的首选方式。在视神经炎患者中，早期 MRI 可进行阳性和鉴别诊断，并为预后提供依据。该技术应适应于视觉通路的探查。炎症性视神经炎的特征是视神经内早期信号异常，而缺血性视神经病变的早期阶段视神经 MRI 正常。MRI 还可检测压迫性和浸润性病变。脑膜瘤的特征是视周间隙异常，而视神经整体增大则提示为胶质瘤。
