扩散加权磁共振成像在急性脑梗死诊断中的价值

目的：探讨扩散加权磁共振成像在急性脑梗死诊断中的价值。方法：采用Philips Gyroscan Intera 1．5T磁共振系统．对19例临床诊断为急性脑梗死的患者行扩散加权磁共振成像(MRI—DWI)，并与常规MRI结果比较，其中男11例，女8例，年龄35～70岁，平均年龄52．5岁。结果：19例患者中，MRI—DWI在发病6h以内提示急性脑梗死者17例，DWI和常规MRl的敏感性分别为100％和5．88％，其特异性均为100％，2例排除了脑梗死。结论：扩散加权磁共振成像对6h以内发病的急性脑梗死的诊断明显高于常规MRI，并对脑梗死的临床治疗有指导意义。

Evaluation of diffusion-weighted MR imaging in diagnosing acute cerebral-infarction

Objective: To evaluate the value of diffusion-weighted magnetic resonance imaging (MRI-DWI) in diagnosing acute cerebral-infarction. Methods: 19 patients (11 male and 8 female, age 35-70 years, average 52.5 years old) with acute stroke symptoms were examined by MRI-DWI (Philips Gyroscan Intera 1.5T MRI system), and the results also were compared with those by conventional MRI. Results: Of the 19 patients, 17 patients were diagnosed as acute cerebral infarction within 6 hours from the onset of symptoms, and 2 patients were ruled out. The diagnostic sensitivity of MRI-DWI and conventional MRI was 100% and 5.88% respectively, and the specificity was 100%. Conclusions: MRI-DWI is superior to conventional MRI in diagnosing acute cerebral infarction within 6 hours from the onset of symptoms. This technique has the guide meaning in the treatment of acute cerebral-infarct.