目的 分析磁敏感加权成像 (SWI)在缺血性脑血管疾病中的应用价 值。方法 以本院2014年1月-2016年5月 确诊的180例缺血性脑血管疾病(脑梗死) 患者为研究对象，均接受常规MRI、SWI 检查，比较不同序列对脑梗死出血性转 化(HT)的检出情况。结果 180例患者中 HT30例，占16.67%，其中HI型25例， PH型5例；常规MRI检出HT18例，其中 HI型14例，而SWI检出HT30例，其中HI 型25例，SWI对HT检出率明显高于常规 MRI检查(P＜0.05)。SWI对梗塞伴急性 期、梗塞伴亚急性期、小梗死及大面积 脑梗死检出率明显高于常规MRI检查(P ＜0.05)。SWI显示梗死周围微小血管18 例，而常规MRI检查无显示。结论 SWI相 比常规MRI检查在脑梗死出血性转化检测 中有明显优势，对继发出血发现时间更 早，对病灶周边微小血管可清晰显示。

Objective To analyze the application value of susceptibility weighted imaging (SWI) in ischemic cerebrovascular diseases. Methods A total of 180 patients diagnosed with ischemic cerebrovascular diseases (cerebral infarction) in our hospital between January 2014 and May 2016 were studied. All patients underwent routine MRI and SWI examination. The detection of hemorrhagic transformation (HT) in patients with cerebral infarction was compared between different sequences. Results Among the 180 cases, there were 30 cases with HT, accounting for 16.67%, of which 25 cases were HI type and 5 cases were PH type. Conventional MRI detected HT in 18 cases, of which 14 cases were HI type, while SWI detected HT in 30 cases, of which 25 cases were HT type. The detection rate of SWI for HI was significantly higher than conventional MRI (P<0.05). The detection rates of SWI in patients with infarction complicated with acute phase, subacute phase, small infarction and large area cerebral infarction were significantly higher than those of conventional MRI (P<0.05). SWI showed 18 cases of small blood vessels around the infarction, while routine MRI examination showed none. Conclusion Compared with conventional MRI examination, SWI has obvious advantages in the detection of hemorrhagic transformation of cerebral infarction, and the detection time of secondary hemorrhage is earlier. It can also clearly show small blood vessels around the lesions.