脑静脉性血管畸形MRI应用及价值

目的探讨MRI多种成像序列在脑静脉性畸形诊断中的应用及评价。方法回顾性分析22例CVM分布及MR征象。常规平扫后,其中18例加做增强后T1WI扫描,CE-MRA8例,3D-TOFMRA3例,SWI6例。结果 MRI平扫显示引流静脉（或导静脉）通常为长T1长T2信号影,少数为短T2信号;髓静脉为长T1、长T2或等T2信号,大部分显示不佳,增强后可清晰显示多根髓静脉呈放射状汇入粗大的引流静脉,呈典型＂水母头＂状或＂蜈蚣＂、＂树根状＂改变。SWI显示CVM更为敏感,引流静脉和髓静脉均为低信号。结论各种MRI成像方法相结合能满意显示CVM的特征性表现,在其诊断和合并症判断方面具有重要价值。

Application and value of MRIin the diagnosis of cerebral venous malformation

Objective To explore the application and evaluation of a variety of imaging sequences of magnetic resonance(MR) imaging in diagnosing cerebral venous malformation(CVM).Methods The distribution of 22 CVM cases and corresponding MR features were retrospectively analyzed.All the patients underwent conventional routine MRI scan and following examinations including 18 cases with extra enhanced T1WI,8 cases with contrast enhanced magnetic resonance angiography(CE MRA),3 cases with 3D time of flight magnetic resonance angiography(3D TOFMRA) and 6 cases with susceptibility-weighted imaging(SWI) were processed.Results he conventional routine MRI scans of draining veins were shown as long T1 and long T2 signal intensities except for few short T2 signal intensities.Most of the conventional routine MRI scans of medullary veins were unclear and shown as long T1 and long T2 or iso T2 signal intensities,and after enhancement,several radial medullary veins were clearly shown afflux into bulky drain veins,demonstrating typical "jellyfish head" appearance or "centipede" and "roots shape" changes.The SWI was rather susceptible to CVM with low intensity on draining veins and medullary veins.Conclusion The characteristic representation of CVM can be achieved by combining a variety of imaging methods,which provided significant value in the diagnosis of CVM and assessment of corresponding complications.