Crépin-Leblond T, Majdalani A, Gautier J C
Service d'Urgences Cérébrovasculaires, La Salpêtrière, Paris.
Rev Neurol (Paris). 1991;147(11):737-9.
We studied 18 patients with transient ischemic accidents (TIA) and normal CT scan during the first 24 hours. MRI was performed 9 days later on average. MRI revealed abnormalities in 10 patients (56 p. 100), but only 5 of them (27 p. 100) had lesions corresponding to TIAs, and in every case these were in the carotid territory. In the 7 patients with clinical signs of TIA in the vertebro-basilar territory, MRI was always negative. In 5 patients (27 p. 100), MRI showed abnormalities that were unrelated to TIA. This study suggests that MRI is of limited value in detecting brain tissue abnormalities and is perhaps not more sensitive than CT in vertebro-basilar TIA. However, in view of the small number of patients these results must be interpreted with caution.
我们研究了18例在最初24小时内发生短暂性脑缺血发作（TIA）且CT扫描正常的患者。平均9天后进行了MRI检查。MRI显示10例患者（56%）存在异常，但其中只有5例（27%）有与TIA相对应的病变，且每例均位于颈动脉供血区域。在7例有椎基底动脉供血区域TIA临床体征的患者中，MRI检查结果均为阴性。5例患者（27%）的MRI显示有与TIA无关的异常。本研究提示，MRI在检测脑组织异常方面价值有限，在椎基底动脉TIA中可能并不比CT更敏感。然而，鉴于患者数量较少，这些结果必须谨慎解读。
