磁共振血管造影及磁共振扩散加权成像技术在急性脑梗死缺血半暗带诊断中的应用

目的探究磁共振血管造影(magnetic resonance angiography,MRA)、磁共振扩散加权成像(diffusion weighted imaging,DWI)技术对急性脑梗死缺血半暗带(ischemic penumbra,IP)的诊断价值。方法回顾性分析2017年5月至2019年10月本院收治的45例急性脑梗死患者的临床资料,所有患者在发病6 h内均接受灌注成像(perfusionweighted imaging,PWI)、MRA、DWI检查,根据MRA显示大脑中动脉M1段闭塞情况,分为显示M1段闭塞组(n=24)与未显示M1段闭塞组(n=21)。比较两组DWI梗死体积、PWI异常体积,分析MRA-DWI梗死体积不匹配、MRA-DWI梗死部位不匹配情况。结果两组DWI梗死体积比较差异无统计学意义;MRA显示M1段闭塞组PWI异常体积大于未示M1段闭塞组,差异有统计学意义(P<0.05);45例患者中,存在PWI-DWI不匹配36例,占比80.00%;MRA-DWI梗死体积不匹配17例,占比37.78%;MRA-DWI梗死部位不匹配16例,占比为35.56%。结...

Application of MRA and DWI in the diagnosis of ischemic penumbra of acute cerebral infarction

Objective To explore the diagnostic value of magnetic resonance angiography(MRA) and magnetic resonance diffusion weighted imaging(DWI) techniques for ischemic penumbra(IP) of acute cerebral infarction. Methods The clinical data of 45 patients with acute cerebral infarction admitted in our hospital from May 2017 to October 2019 were retrospectively analyzed. All patients underwent perfusion weighted imaging(PWI), MRA, and DWI within 6 h of onset. According to the MRA occlusion of the middle cerebral artery M1 segment, they were divided into showing M1 segment occlusion group(n=24) and not showing M1 segment occlusion group(n=21).The DWI infarction volume and PWI abnormal volume were compared between the two groups, and the MRA-DWI infarct volume mismatch and MRA-DWI infarction site mismatch were analyzed.Results There was no significant difference in DWI infarction volume between the two groups;MRA showed that the abnormal volume of PWI in the showing M1 segment occlusion group was larger than that in the not showing M1 segment occlusion group, the difference was statistically significant(P<0.05);among the 45 patients, there were 36 cases of PWI-DWI mismatch, accounting for 80.00%;17 cases of MRA-DWI infarct volume mismatch, accounting for 37.78%;and 16 cases of MRA-DWI infarction site mismatch, accounting for 35.56%. Conclusion MRA and DWI technology have certain diagnostic value for the diagnosis of IP in acute cerebral infarction, and can provide help for screening patients who need thrombolytic therapy.