3.0T磁敏感加权成像诊断脑梗死后脑出血的价值

目的：探讨3.0T磁敏感加权成像（SWI）对梗死后脑出血的诊断价值。方法：对50例急性脑梗死后疑有脑出血患者行CT检查,同时行MRI常规序列（T2WI、T1WI、DWI）扫描及SWI扫描,对检查结果进行统计学分析。结果：34例患者CT扫描证实为梗死后脑出血,SWI诊断脑出血34例,T2WI诊断19例,T1WI诊断21例,DWI诊断25例。SWI、T2WI、T1WI和DWI诊断梗死后脑出血的敏感度分别为100.0%、59.0%、61.4%和73.0%,特异度分别为100.0%、65.2%、68.0%和65.3%,阳性预测值分别为100.0%、68.1%、71.0%和75.4%,阴性预测值分别为100%、60.3%、57.2%和78.3%,约登指数（正确指数）分别为1.0、0.24、0.29和0.38。诊断试验秩和比法分析示SWI、T2WI、T1WI和DWI各序列的秩和比值（RSR）分别为1.0、0.3、0.5和0.7。结论：SWI诊断梗死后脑出血比MRI常规扫描序列具有更高的临床应用价值,可作为急性脑梗死及溶栓治疗后常规复查方法。

Clinical Value of 3.0T MR Susceptibility Weighted Imaging in the Diagnosis of Intracerebral Hemorrhage after Infarction

Objective:To investigate the clinical value of 3.0T susceptibility weighted imaging (SWI) in the diagnosis of post-infarct cerebral hemorrhage.Methods:50 patients with suspected cerebral hemorrhage after acute cerebral infarct underwent CT examination and conventional MR sequence (T2WI,T1WI,DWI) as well as SWI simultaneously,the results were statistically analyzed.Results:Of the 34 patients had post-infarct cerebral hemorrhage proved by CT,cerebral hemorrhage was diagnosed by SWI (34 patients),T2WI (19 pati...