视觉定位技术在放疗设备机械精度检测中的可行性研究  

Feasibility study of visual positioning systems in the mechanical accuracy detection of radiotherapy equipment

作　　者：郑芬 谢贤忠 杨志宇 朱亚凯 吴冰 李诺兮 何炳蔚[2] 赵益发 李小波[1,3,4] Zheng Fen;Xie Xianzhong;Yang Zhiyu;Zhu Yakai;Wu Bing;Li Nuoxi;He Bingwei;Zhao Yifa;Li Xiaobo(Department of Radiation Oncology,Fujian Medical University Union Hospital,School of Medical Imaging,Fujian Medical University,Fuzhou350001,China;School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou350108,China;Department of Radiation Oncology,Zhangpu Hospital,Zhangzhou363200,China;Department of Engineering Physics,Tsinghua University,Beijing100084,China)

机构地区：[1]福建医科大学附属协和医院放疗科、福建医科大学医学影像学院,福州350001 [2]福州大学机械工程及自动化学院,福州350108 [3]漳浦县医院放疗科,漳州363200 [4]清华大学工程物理系,北京100084

出　　处：《中华放射肿瘤学杂志》2024年第12期1152-1157,共6页Chinese Journal of Radiation Oncology

基　　金：福建省科技厅高校产学研联合创新项目(2023Y4019);福建省卫生健康科技计划项目(2022QNA027);福建医科大学启航基金(2022QH1047)。

摘　　要：目的评估视觉定位系统用于运动模体和临床质量控制的可行性。方法使用CIRS公司的Dynamic Thorax Phantom模型进行模体实验,模拟不同幅度的运动,评估摄像机记录位置与实际运动误差。通过在治疗床表面和准直器机头上贴附标记物,分别模拟治疗床和准直器的运动,实验重复3次进行,记录分析本系统测量与人工测量结果的偏差,以评估系统的准确性和可靠性。结果在运动模体测试中,模体实际运动距离与系统监测的运动距离的偏差为(0.18±0.07)mm。治疗床在x轴、y轴和z轴的直线运动测试中,系统测量结果与加速器人工测量结果的偏差分别为(0.14±0.08)mm、(0.15±0.09)mm、(0.16±0.08)mm。此外,在治疗床旋转方向的运动测试中,误差为0.18°±0.09°。在准直器机头旋转方向的运动测试中,系统的误差为0.11°±0.02°。结论视觉定位系统具有较好的准确性和稳定性,具有潜在的临床应用价值。Objective To evaluate the feasibility of using a visual positioning system for both motion phantom and clinical quality control.Methods A phantom experiment was conducted using the Dynamic Thorax Phantom from CIRS.Different ranges of motion were simulated to assess the discrepancies between camera-recorded positions and actual movements.Visual markers were also attached to the treatment bed and the collimator head,and their movements were simulated as part of the experiment.The experiment was repeated for three times.Discrepancies between system measurements and manual measurements were recorded and analyzed to assess the accuracy and reliability of the system.Results In the motion phantom test,the deviation between the actual motion distance of the phantom and the system's recorded measurement was(0.18±0.07)mm.For linear motion analysis along the X,Y,and Z axes on the treatment table,the measurement errors were(0.14±0.08)mm,(0.15±0.09)mm,and(0.16±0.08)mm,respectively.Additionally,the measurement error in the rotational direction of the treatment couch was 0.18°±0.09°.For the rotational direction of the collimator head,the measurement error was 0.11°±0.02°.Conclusion The system demonstrates good accuracy and stability,and has potential clinical application value.

关 键 词：放射疗法 视觉定位 质量控制 

分 类 号：R730.55[医药卫生—肿瘤]