三维对比增强MR静脉造影在正常腰椎静脉系的应用

Three-dimensional contrast enhancement MR venography of the lumbar vertebral venous plexus in normal persons

目的:探讨三维对比增强MR静脉造影(3DCEMRV)技术对正常腰椎静脉的显示情况。方法:应用3D-FFE序列对62例不同年龄组自愿者行三维对比增强MR静脉造影扫描,观察腰椎各节段椎管内、外静脉的显示率,获取最佳腰椎静脉显示的扫描时相。结果:42例腰椎管内各静脉和36例椎管外各静脉均得到良好显示,且上位腰椎静脉系显示明显优于下位腰椎,除了L1～2水平左右吻合静脉外,40岁以下组静脉显示率优于41岁以上组,注入造影剂后50～150s扫描显示腰椎静脉系最佳。结论:3DCEMRV成像能比较清晰的显示正常腰椎静脉的各主要分支,使得无创地深入研究腰椎静脉系统成为可能。

Objective: To evaluate the detectability of the lumbar vertebral venous plexus in normal persons with three-dimensional contrast enhancement MR venography(3D CE MRV). Materials and Methods: 3D FFE protocol was applied for 3D CE MRV. The detectability of the lumbar venous plexuses on the coronal MRI from 62 volunteers was evaluated. Results: The detectability of vein in groups younger than 40 years old was better than that of groups older than 41 years old except for the retrocorporeal anastomasis. Similarly, the supperior parts of the lumbar vertebral venous plexuses were displayed better than the inferior ones. The internal vertebral venous plexuses of 42 cases and the external ones of 36 cases were showed completely. Conclusion: 3D CE MRV can show the whole lumbar vertebral venous plexus clearly and will play an important role on further study in the future.