摘要
目的 应用磁共振血管造影 (MRA)研究颈内动脉狭窄或闭塞的侧支循环途径。方法 经MRA确诊的颈内动脉狭窄或闭塞者 4 0例 ,MRA上脑血管无异常表现 6 0例为对照组 ,分析其MRA、MRI表现和临床资料。结果 所有患者均有颈内动脉分叉以上狭窄或闭塞 ,病变血管 5 9支。疾病组中颈内动脉狭窄或闭塞同侧后交通动脉MRA出现率明显高于对照组 (P <0 .0 1) ;显示同侧后交通动脉增粗 2 8支 (4 7.5 % )。疾病组前交通动脉MRA出现率与对照组无统计学差异 ;同侧软脑膜吻合支显示率为 4 7.5 % (2 8/ 5 9)。MRA上眼动脉、脉络膜前动脉、硬脑膜吻合支显示不良 ,对基底节区MMD血管显示好。结论 MRA无创、安全、整体性好 ,可从形态和功能上评价颈内动脉狭窄或闭塞后侧支循环的形成方式与程度 ,能为该病的诊断、治疗、预后提供较全面的评价 ,可列为首选检查方法。
Objective To evaluate the collateral pathways of internal carotid artery (ICA) severe stenosis or occlusion on MRA.Methods Forty patients with ICA stenosis or occlusion were confirmed by MRA, Sixty persons that had normal findings on MRA served as control group. We analyzed MRA, MRI findings and clinical materials in the two groups.Results Severe stenosis or occlusion of over fork of ICA were showed clearly in all patients on MRA. On MRA, the presence rate of ipsilateral posterior communicating artery (PCoA) in the study group was significantly higher than the controls (P<0.01),28 ipsilateral PCoAs were larger (47.5%). Twenty eight showed Ipsilateral leptomeningeal anastomosis 28 (47.5%) on MRA, OphA and AchA could not be shown clearly, while MMD vessles were shown well. Compared with the control group, the presence rate of ACoA had no statistical difference in the study group. Three patients with large infarction (diameter>5cm) were short of collateral circulation on MRA.Conclusion MRA is a noninvasive and safe angiographical method. It can evaluate the degree and patterns of occlusion or collateral circulation in morphology and/or function. MRA could be the perfect method for the diagnosis, therapy for the prognosis of ICA stenosis or occlusion.
出处
《中国医学影像技术》
CSCD
2003年第10期1387-1389,共3页
Chinese Journal of Medical Imaging Technology
关键词
脑血管闭塞性疾病
颈内动脉
侧支循环途径
磁共振血管造影
Cerebralvascular occlusive disease
Internal carotid artery
Collateral pathways
Magnetic resonance angiography
