【摘 要】目的：探究体表标记辅助线在胸腹部肿瘤放疗中对摆位误差精度的影响。方法：随机选取80例需进行胸腹部放疗的患者，实验组以体表标记线辅助摆位，对照组正常摆位，之后用CBCT修正摆位误差，对摆位误差进行统计分析。结果：采用体表标记辅助线摆位的患者在X方向，Y方向上的误差减小，Z方向无明显变化。结论：体表标记辅助线明显提升胸腹部放疗病人的摆位精度。

    【关键词】胸腹部肿瘤；体表标记辅助线；摆位误差；CBCT

    Application of body surface marker auxiliary line in radiotherapy of thoracic and abdominal tumors

    Zhoujun

    Department of Oncology， Xinqiao Hospital， Military Medical University， Chongqing 400037， China

    【Abstract】Objective：To investigate the effect of body surface marker-assisted line on the accuracy of placement error in thoracic and abdominal tumor radiotherapy. Methods：Eighty patients with thoracoabdominal radiotherapy were randomly selected. The experimental group was assisted by the body surface marker line ......