Objective: To evaluate the accuracy of cervical pedicle screw pilot holes placement by bilateral oblique X-ray films with the spiral wires as the guide pin.

目的：探讨螺旋形导针配合双侧斜位X线片判断颈椎椎弓根螺钉置入孔道准确性的可行性。

Methods X-ray posteroanterior, lateral, double-oblique and dynamic lateral overflexional and overextensive views were performed on 21 patients.

方法对下颈椎不稳症21例均采用正侧双斜位及摄X线动态颈椎侧位过曲过伸片。

Methods To analyse X-ray images of lumbar vertebrae positive side and left-right oblique position plain films and CT images (only 24 cases) of 82 patients.

方法对82例椎弓完整性腰椎滑脱症的正侧位、双斜位X线平片及CT图像(24例加作CT扫描)进行分析。