磁共振弥散加权成像在急性脑梗死诊断中的应用价值研究

The Study Applied Value of Diffusion Weighted Imaging in the Diagnosis of Acute Cerebral Infarction

目的 研究磁共振弥散加权成像(DWI)诊断急性脑梗死的价值。方法 对86例临床诊断为脑梗死的病例进行DWI和常规MRI扫描,分析在脑梗死不同时期DWI的表现。结果 在起病的超急性期及急性期(>6小时,<48小时)DWI显示率为100％,病灶大小为(24.8±21.6)mm,T2/FLAIR上病灶大小为(7.9±6.8)mm,两者比较的t=12.7,P<0.05,在亚急性期(2～14天)DWI与T2W加Flair比较,DWI不如T2W加Flair,对于慢性期脑梗死(超过14天),DWI不易辨认。结论DWI对急性期脑梗死的诊断准确率高,明显优于常规MRI。

Objective To study the diagnostic value of diffusion weighted imaging in acute cerebral infarction. Methods Eighty-six patients with ischemic stroke underwent conventional MRI and DWI, and the characteristics of DWI were analyzed. Results Different signal displayed on DWI is 100% at su-peracute stage(<6 h)and acute stage(>6 h,<48 h), the sizes of focus were (24. 8±21. 6) mm and (7. 9±6. 8)mm on DWI and T2w/Flair, t =12. 7, P< 0. 05, during the time range of 2-14days, DWI is not as good as T2w/Flair, different signal could not be found on DWI(>14d). Conclusions DWI is highly accurate in diagnosing acute cerebral infarction and is superior to conventional MRI.