颈性眩晕患者的寰枢椎影像学特征

目的探讨颈性眩晕患者的寰枢椎影像学特征。方法对74例颈性眩晕患者摄颈椎前后位、侧位及颈椎张口位片，部分患者行寰枢椎CT三维重建和／或颈椎MRI椎动脉造影。结果本组患者的影像学异常主要有颈椎生理曲度变直、寰椎两侧块宽度不等或／和两侧块与枢椎齿状突间距离不等、侧块下关节面与枢椎上关节面不平行等；寰枢椎CT三维重建可显示寰椎侧移和旋转；颈椎MRI椎动脉造影可显示寰椎侧移和旋转对椎动脉的影响；寰椎后弓以上旋转和侧移的椎动脉商径变小。结论颈性眩晕的病变部位主要在寰枢椎，发病机制是寰椎侧移和向前或后旋转。

Features of Atlantoepistrophic Imaging Examination in Patients with Vertigo of Cervical Syndrome

Objective To investigate atlantoepistrophic imaging features of patients with vertigo of cervical syndrome. Methods 74 patients with vertigo of cervical syndrome were checked by photographs of cervical vertebrae of A-P position, lateral position and mouth open position, some patients were checked by CT three-dimensional reconstruction and/or MRI vertebral arteriography. Results Imaging examination of these patients showed that physiolgical curvature of cervical vertebrae became straightened, width of both lateral masses of atlas was inequality, space of both lateral masses of atlas to odontoid process of vertebra dentata was also inequality, and inferior articular surface of lateral mass was not parallel with superior articular surface of axis. The CT could display the side displacement and anterior or posterior rotation of lateral masses of atlas. The cervical MRI vertebral arteriography could display the effect of side displacement and rotation of lateral masses of atlas on vertebral artery. If side displacement or rotation of vertebral artery occurred, the diameter of artery decreased. Conclusion The diseased region of vertigo of the cervical syndrome is the atlas and axis, especially the side displacement and anterior or posterior rotation of the atlas.