目的　分析体部X -刀治疗过程的质量保证和质量控制。方法　采用标准电离剂量法和胶片剂量法对体部X -刀照射的剂量、摆位精度、靶点位置精度进行测量。结果　体部X -刀治疗最大误差为 3 % ,完全符合国家规定 5 %的标准。结论　QA和QC是保证体部X -刀治疗精度的极其重要的措施 Objective To analyze the quality assurance and quality control of body X-knife treatment. Methods The dose, positioning accuracy and target position accuracy of X - knife irradiation were measured by standard ionization dose method and film dose method. Results Body X - knife treatment of the maximum error of 3%, in full compliance with state regulations 5%. Conclusion QA and QC are the most important measures to ensure the accuracy of X - knife treatment