[目的 ]评价各种投射位的X线平片对椎弓根螺钉位置的准确性判定 .[方法 ]对 4例病人的 16枚椎弓根螺钉均在术中、术后拍X线侧位及双斜位片 ,术后做CT扫描 .[结果 ]侧位片无错位钉检出率 ,双斜位的为 6 % ,CT的为 12 % .[结论 ]侧位加双斜位是目前条件下最可靠的术中钉位判定手段 [Objective] To evaluate the accuracy of X-ray plain radiographs on pedicle screw position. [Methods] Sixteen pedicle screws in 4 patients were treated intraoperatively and postoperatively. [Results] The detection rate of misdiagnosis pins in lateral radiographs was 6% for double oblique and 12% for CT. [Conclusions] Lateral plus double oblique Under the conditions of the most reliable intraoperative nail determination means