【摘要】 目的:通过光学定位系统(OPS)评估室内激光系统在放射治疗时对不同部位患者的摆位精度。方法:为验证室内激光系统摆位的不稳定性,本研究对象为404例常规放射治疗的头颈部、胸部、腹部和骨盆区域肿瘤患者。所有患者均采用室内激光系统方法摆位,同时记录OPS上显示的X(左右)、Y(前后)、Z(上下)3个方向的摆位误差。结果和结论:室内激光系统在放射治疗时对不同部位患者的摆位精度不同,摆位精度及稳定性较差,尤其是胸部区域,建议应用OPS直接进行放射治疗摆位。更多还原

【Abstract】 Objective To evaluate the setup accuracy of indoor laser system in radiotherapy of tumors at different sites by optical positioning system(OPS). Methods A total of 404 patients with tumors of head and neck, chest, abdomen and pelvic who were treated with conventional radiotherapy were enrolled in the study to verify the instability of indoor laser system for patient setup. The patients’ positions were adjusted by indoor laser system, and meanwhile the setup errors displaying in OPS in X(left-right), Y(anterior-posterior) and Z(superior-inferior) axes were recorded. Results and Conclusion The setup accuracy of indoor laser system is various in patients with tumors at different sites, and the results reveal that indoor laser system has a lower setup accuracy and poor stability, especially for chest tumors. It is recommended to perform radiotherapy setup directly using OPS.更多还原