烟雾病MRI和MRA诊断价值(附16例报告)

目的；评价MRI和MRA对烟雾病的诊断价值。方法：分析16例烟雾病患者的MRI、MRA表现和临床资料。MRA采用三维时间飞跃法。结果：16例患者MRA检查均显示不同程度的颈内动脉分叉以上狭窄或闭塞，其中17支后交通动脉增粗，4支眼动脉增粗；16例显示基底节区异常血管网，其中6例同时显示后部异常血管网；10例显示软脑膜吻合支增多；MRI显示脑出血或脑梗塞等脑实质改变，并能显示基底节区异常血管点状流空。结论：MRI和MRA是诊断烟雾病的有效非创伤性检查方法。对该病的诊断、筛选、随访和外科5一的评价有较大价值。

Moyamoya disease:the values of MR imaging and MR angiography(a report of 16 cases)

Objective:To evaluate MRI and MRA in the diagnosis of moyamoya disease.Methods:MRI and MRA findings and clinical materials of 16 patients with moyamoya disease were retrospectively analyzed.All patients were performed with three dimensional time of flight MRA.Results:The stenosis or/and occlusion of the branches distal from the internal carotid bifurcation in varying degrees were shown on MRA in all cases.MRA also documented the dilated posterior communicating arteries in 17,the dilated ophthalmic arteries in 4 and the anastomoic network in basal ganglia region in 16,of which 6 patients were accompanied by the anastomoic network in posterior basal ganglia area.In addition,MRA showed the increase of leptomeningeal anastomotic branches in 10 patients.MRI demonstrated cerebral hemorrhage or infarction,and numerous spotty flow void effect in basal ganglia region.Conclusion:MRI and MRA are effective and noninvasive methods for the diagnosis of moyamoya disease.They are of great value for the diagnosis,screening,follow up study and postoperative evaluation of moyamoya disease.