【摘要】 目的 利用磁敏感加权成像技术分析正常婴儿大脑深部静脉及其主要属支的解剖学变异,并进一步探讨其临床应用价值。方法 收集80例0～12月龄健康婴儿进行3.0T磁共振磁敏感加权成像ESWAN序列头部扫描,重建最小密度投影,对每例大脑双侧深部静脉进行观察并根据隔静脉-大脑内静脉汇合点位置和前尾状核静脉回流汇入的位置分别分为4个(ⅠA、ⅠB、ⅡA和ⅡB)和3个(Ⅰ、Ⅱ和Ⅲ)类型。结果 双侧大脑内静脉、隔静脉、丘脑纹状体静脉显示率为100%,前尾状核静脉显示率为88.1%。隔静脉-大脑内静脉汇合点位置分型中以ⅠA型最常见,前尾状核静脉回流汇入的位置分型中Ⅰ型最常见。结论 磁敏感加权成像的最小密度投影法可清晰地显示脑深部静脉及其属支的变异,可为观察婴儿脑静脉的结构和分布提供可靠的方法。更多还原

【Abstract】 Objective To describe the anatomical variants of infants’ internal cerebral veins and their tributaries with MR susceptibility weighted imaging,and to evaluate the capability in the visualization of cerebral deep veins.Methods 80 healthy infants were enrolled in this study.All the brain images were obtained by a 3D gradient-echo sequence（Enhanced T₂^* weighted angiography-ESWAN） on a 3.0T MR,which were reconstructed with minimal intensity projection.The septal vein,thalamostriate vein,internal cerebral vein and anterior caudate nucleus veins were evaluated.4 types（ⅠA,ⅠB,ⅡA,ⅡB） were classified based on their relationship with the septal vein-internal cerebral vein junction and interventricular foramen,and 3 types（Ⅰ,Ⅱ,Ⅲ） based on the drainage patterns of the anterior caudate nucleus veins.Results The septal vein,thalamostriate vein and internal cerebral vein could be clearly and continuously visualized in 100% infants,and the visualization rate of the anterior caudate nucleus veins was 88.1%.Type Ⅰ A and Type Ⅰ were most common in the two classification patterns.Conclusion Infants ’ internal cerebral veins and their tributaries are able to be clearly shown with the minimal intensity projection in susceptibility weighted imaging,which is a good method to evaluate the cerebral deep veins in infants.更多还原