硬脊膜动静脉瘘的MRI表现

The MRI features of spinal dural arteriovenous fistula

目的:对硬脊膜动静脉瘘(SDAVF)的MRI征象进行分析,以期对其临床诊断和鉴别诊断提供帮助。材料和方法:对6例经手术或DSA证实的硬脊膜动静脉瘘的患者的MRI影像资料进行复习。结果:所有病例均见胸段髓外硬膜下串珠状或虫蚀状流空信号,增强扫描见明显串珠状强化,脊髓内有不同程度长T1长T2信号。结论:MRI可根据脊髓外硬膜下流空信号明确诊断硬脊膜动静脉瘘,增强扫描对显示畸形血管有帮助。

Objective To analyze MRI features of spinal dural arteriovenous fistulaSDAVF and get the identification imaging findings for the diagnosis and differential diagnosis of SDAVF. Materials and Methods To review the MR imagings in 6 cases of SDAVF which were proved by angiography or operation. Results All cases were found vessel-like flow void signal abnormalities in the subarachnoid space on MRI and marked vessel-like enhancement on Gd-DTPA enhanced MRI. Long T1 and long T2 signal also were found within the spinal cord. Conclusion The SDAVF diagnosis can be given by MRI according to the findings of abnormal vessel-like flow void signal abnormalities in the subarachnoid space. And contrast MRI study is helpful for the demonstration of abnormal blood vessels.