早期脑梗死的MRI和MRA诊断

MRI and MRA diagnosis of early cerebral infarction

目的:评价磁共振成像(MRI)和磁共振血管成像(MRA)对早期脑梗死的诊断价值。方法:对经临床证实的120例早期脑梗死的MRI和MRA资料进行回顾性分析。全部患者均有脑MRISE序列和3D-TOFMRA。发病后2h～6hMRI检查者26例,7h～72hMRI检查者94例。结果:120例早期脑梗死中,SE序列发现病变109例,呈长T1和长T2信号,其中大面积梗死41例,腔隙性梗死68例。MRA发现血管异常106例,表现为动脉闭塞、狭窄和硬化。结论:MRI和MRA联合使用能提高早期脑梗死的检出率。SE序列扫描可漏检部分早期脑梗死。

Objective: To investigate diagnostic value of MRI and MRA for early cerebral infarction. Methods: MRI and 3D-TOF MRA of 120 patients with early cerebral infarction verified by clinic manifestation were retrospectively analyzed. 26 patients performed MRI and MRA in 2h^6h, 94 patients in 7h^72h after clinical findings occurred. All patients had brain MRI SE sequence and 3D-TOF MRA. Results: 109 of 120 cases with early cerebral infarction were found on MRI SE sequence, which demonstrated long T 1 and long T 2 signal intensity. Among them, large-area and lunular infarctions were 4 and 68 cases respectively. 106 of 120 cases were revealed arterial abnormalities, including arterial occlusion, stenosis as well as sclerosis. Conclusion: MRI SE sequence combined with MRA can enhance the rate of detecting early cerebral infarction. SE sequence alone may omit some early cerebral infarction.