MRI血流成像技术及常春藤征在MRI诊断烟雾病中的应用价值

Clinical value of MRI blood flow imaging and ivy sign in the diagnosis of Moyamoya disease

目的探讨烟雾病MRI平扫、MRI血流成像技术的影像表现及常春藤征(柔脑膜高信号征)在诊断烟雾病中的价值。方法回顾性分析60例临床确诊为烟雾病患者的MRI平扫、MRI血流成像技术图像资料。结果MRI平扫显示脑实质出现病变占52例(86.7%),其中18例(30.0%)为脑出血,34例(56.7%)出现了脑梗塞,8例(13.3%)脑实质内未见确切病变,44例(73.3%)患者在MRI T2-FLAIR图像上出现了常春藤征(柔脑膜高信号征),即额顶叶脑沟内见连续或不连续的高信号影;MRI血流成像技术图像主要表现为单/双侧颈内动脉末端、大脑前动脉、中动脉的狭窄、闭塞及形成异常的侧支循环,60例(100%)均可见异常的侧支血管网形成,呈“烟雾状”。结论MRI平扫、MRI血流成像技术及常春藤征(柔脑膜高信号征)对于烟雾病的诊断有重要意义。

Objective To explore the manifestations of MRI and MRI blood flow imaging technique and ivy sign(leptomeningeal hypersignal sign)in the diagnosis of moyamoya disease.Methods Retrospective analysis of MRI and MRI Blood flow imaging technique data of 60 patients with clinically diagnosed moyamoya disease was performed.Results Among the 60 patients,there were 31 females and 29 males,aged from 4 to 63 years old.MRI plain scan showed 52(86.7%)cases of brain parenchyma,cerebral hemorrhage in 18(30.0%)cases,cerebral infarction in 34(56.7%)cases,no definite abnormality in cerebral parenchyma in 8(13.3%)cases,ivy sign(leptomeningeal high signal sign)in 44(73.3%)on T2-FLAIR,High Signal intensity was seen in the frontal parietal sulcus.The main manifestations of MRI Blood flow imaging technique were stenosis,occlusion and abnormal collateral circulation of single/bilateral internal carotid artery,anterior cerebral artery and middle artery,In 60 cases(100%),abnormal collateral vascular network was found,It's in the form of“smoke”.Conclusion MRI Plain Scan,MRI blood flow imaging and ivy sign are important for the diagnosis of moyamoya disease.