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目的:评价数字减影血管造影(DSA)与磁共振血管成像(MRA)在大脑中动脉(MCA)狭窄诊断中的应用价值。方法:对62例脑缺血疾病患者1周内进行DSA和MRA检查,并且比较其影像学结果。结果:62例病人共124条MCA中,MRA及DSA均显示无狭窄的78条,狭窄<10%的5条,狭窄10%～50%的5条,狭窄51%～99%的6条,闭塞的10条。MRA对无狭窄的敏感性、特异性分别为92.86%、86.96%,狭窄<10%的敏感性、特异性分别为85.00%、97.79%,狭窄10%～50%的敏感性、特异性分别为87.56%、95.83%,狭窄51%～99%的敏感性、特异性分别为88.56%、96.58%,闭塞的敏感性、特异性分别为100.00%、100.00%。结论:MRA能较为准确地反映MCA狭窄情况,可以在结合临床症状的前提下作为筛查MCA狭窄的首选手段。
Objective: To evaluate the value of digital subtraction angiography (DSA) and magnetic resonance angiography (MRA) in the diagnosis of middle cerebral artery (MCA) stenosis. Methods: Sixty-two patients with cerebral ischemic disease underwent DSA and MRA within one week and their imaging findings were compared. Results: There were 78 cases without stenosis, 5 cases with stenosis <10%, 5 cases stenosis 10% ~ 50%, 6 cases stenosis 51% ~ 99% with MRA and DSA in 62 patients. Blocked 10. The sensitivity and specificity of MRA for stenosis were 92.86% and 86.96% respectively. The sensitivity and specificity of MRA were 85.00%, 97.79% and 10% ~ 50% respectively. The specificity of MRA was 87.56%, 95.83%, stenosis of 51% to 99%, the specificity was 88.56%, 96.58% respectively. The sensitivity and specificity of occlusion were 100.00% and 100.00% respectively. Conclusion: MRA can more accurately reflect the stenosis of MCA, and can be the first choice of screening MCA stenosis on the premise of clinical symptoms.