超低场磁共振成象诊断老年人缺血性脑梗塞(273例分析)

ULF-RI Diagnosis of Aged Cerebral Ischemic Infarction (Report of 273 Cases)

回顾分析60岁以上缺血性脑梗塞273例(含792个病灶),剖析病灶的超低场(ULF)磁共振成象(MRI)表现。在T_2权重图象上显示的病灶在T_1权重图象上有36.24％未能显示,强调检查应从T_2权重图象开始。MRI发现病变较CT早,对脑中线及后颅窝病变的显示较CT敏感和清晰。

This article reports the result of analysis for 792 lesions in 273 cases of cerebral ischemic infarction on ULF-MRI(Ultralow field magnetic resonance imaging The value and limitation of ULF - MRI in the diagnosis of cerebral ischemic infraction were discussed. T2 weighted image was more sensitive than T1 weighted image in demonstrating lesion. Comparision of diagnosis between ULF - MRI and CT in patients with cerebral ischemic infarction had been proved that MRI may be more early, accurate and distinct than CT, especially for the lesion located at the midline and posterior fossa of brain.