摘要
目的 评价磁共振扩散加权成像 (DWI)对超急性期脑梗死诊断的准确性。方法 对卒中样起病且发病时间在 6h以内、临床高度怀疑脑梗死的 2 1例患者进行DWI和常规MRI扫描。结果DWI诊断脑梗死 16例 ,其最终临床诊断均为急性脑梗死 ,DWI阴性 5例 ,其最终临床诊断为短暂性脑缺血发作 ;DWI所见高信号区域的同一部位在以后的CT和 (或 )MRI随访中均有脑梗死病灶 ;DWI诊断超急性期脑梗死的敏感度和特异度均为 10 0 % ,常规MRI诊断超急性期脑梗死的敏感度为 2 5 % ,特异度为 10 0 %。结论 DWI对超急性期脑梗死的诊断高度准确 ,其敏感度明显高于常规MRI。
Objective To evaluate the accuracy of MR diffusion weighted imaging (DWI) in the diagnosis of hyperacute cerebral infarction. Methods Twenty one patients with onset of strokelike symptoms underwent conventional MRI and DWI within 6 hours. Results DWI indicated cerebral infarction in 16 patients, all of whom had a final diagnosis of acute stroke. DWI was negative in 5 patients, all of whom had a final diagnosis of TIA. The abnormality seen at DWI was confirmed with follow up study. DWI had a sensitivity of 100% and a specificity of 100% in the diagnosis of hyperacute cerebral infarction, and conventional MRI interpretation yielded a sensitivity and specificity of 25% and 100%, respectively. Conclusion DWI is highly accurate in diagnosing hyperacute cerebral infarction and is superior to conventional MRI.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2002年第3期215-218,共4页
Chinese Journal of Radiology
关键词
磁共振成像
回波平面成像
诊断
超急性期脑梗死
Cerebral ischemia
Magnetic resonance imaging
Echo planar imaging
Evaluation studies
