硬脊膜动静脉瘘8例影像学检查

The imaging examination of spinal dural arteriovenous fistulas: a report of 8 cases

目的:通过分析SDAVF的影像学特点,提高对SDAVF的认识和诊断水平。方法:回顾性分析8例SDAVF患者的影像资料。结果:8例患者脊髓MRI检查示大部分患者有脊髓水肿信号,脊髓前后有葡行的血管流空影;部分患者有脊髓软化坏死信号。全部患者均经脊髓血管造影明确诊断。结论:脊髓MRI可对SDAVF进行初步诊断,确诊及瘘口的精确定位有赖于选择性脊髓血管造影。

Objective To analyze the imaging findings and improve the level of understanding and diagnosis of spinal dural arteriovenous fistulas （SDAVF）. Methods The MRI image data of 8 patients with SDAVF were analyzed retrospectively. Spinal angiography was done in all the patients to verify the diagnosis. Results Spinal MRI examination showed that most of the patients had spinal cord edema signal in 8 patients with SDAVF. A centrally located hyperintense signal on Tl-weighted images signify the swelling of the spinal cord and the hypointense＂flow void＇phenomena dorsal to the cord. The enlarged and tortuous veins were characterized in all the cases.The signal of spinal cord necrosis was seen in some patients. Conclusion MRI was a reliable diagnostic method in diagnosis of SDAVF, but catheter angiography was required to localize the fistula as well as the angloarchitectures, on which the mode of treatment depends.