结果CT平扫诊断颈椎间盘膨或突出症阳性率仅为8%（6/75），诊断骨质增生45.33%（34/75）。
Results Positive findings of CT for diagnosing cervical disc herniation were 8 % (6/75), those for diagnosing hyperosteogeny were 45.33 % (34/75).
目的探讨CT平扫诊断颈椎间盘膨或突出症的限度。
Objective To assess the limitation of computed tomography(CT) in the diagnosis of cervical disc herniation.
方法总结CT三维导航系统辅助下置入的159枚颈椎（C2-7）椎弓根螺钉，术后进行经椎弓根螺钉水平的CT平扫，观察椎弓根螺钉置入的精确性。
Methods 159 pedicle screws inserted by CT-based navigation system and 145 cervical (C2-C7) pedicle screws inserted by X-ray fluoroscopy were observed by postoperative CT scan.
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