摘要
目的测试基于Synergy加速器微光刀立体定向放射治疗系统(Dual Camera 2 mm Stereotactic Radiosurgery,D2SRS)的准确性和可靠性。方法对Synergy加速器机械性能进行测试,判断加速器现有状态是否满足D2SRS及相关放射治疗技术的使用条件。同时对D2SRS的多叶准直器系统、图像引导系统、治疗计划系统分别进行测试,确定其临床实施的可靠性和准确性。结果加速器性能测试各参数指标均符合相应标准,其中机架及小机头等中心旋转测试中,在150°机架时偏离基线最大(0.9 mm),在30°小机头角度时偏离基线最大(0.8 mm),且外挂多叶光栅(Multi-leaf Collimator,MLC)并未对其精度产生影响。D2SRS各参数精准度均在要求范围之内,MLC与加速器中心无偏差,位置精度验证中在(-5,-3)位置偏差最大为0.7 mm,具备了实施立体定向放射治疗技术的先决条件。结论对加速器现有状态及D2SRS各系统测试结果总体满足临床要求,在做好日常质量控制的基础上可用于患者治疗。
Objective To evaluate the accuracy and reliability of the Synergy accelerator-based system for stereotactic radiotherapy system of dual camera 2 mm stereotactic radiosurgery(D2SRS).Methods First,the mechanical accuracy of the Synergy accelerator was tested to determine whether the current state of the accelerator met the installation requirements of the D2SRS system and related radiotherapy techniques.Then,the multi-leaf collimator(MLC)system,the image guidance system and the treatment plan system of the D2SRS system were tested to determine the reliability and accuracy of their clinical implementation.Results The accelerator performance test parameters were in accordance with the corresponding standards.The maximum deviation from baseline was found when the rock was at 150°(0.9 mm)and the small head was at 30°(0.8 mm)in the isocentrial rotation test of the rack and small head.The external hanging MLC had no effect on its accuracy.The precision of all parameters of the D2SRS system was within the required range,and there was no deviation between the MLC and the accelerator center.The position accuracy verification test showed that the maximum deviation was 0.7 mm in the position of(-5,-3).The D2SRS system had the precondition of implementing stereotactic radiotherapy.Conclusion The test results of the current state of the accelerator and the D2SRS system generally meet the clinical requirements,and can be used for the treatment of patients on the basis of routine quality control.
作者
滑鹏
解传滨
陈高翔
戴相昆
牛保龙
申红峰
葛瑞刚
徐寿平
曲宝林
HUA Peng;XIE Chuanbin;CHEN Gaoxiang;DAI Xiangkun;NIU Baolong;SHEN Hongfeng;GE Ruigang;XU Shouping;QU Baolin(Department of Radiation Oncology,The First Medical Center of PLA General Hospital,Beijing 100853,China)
出处
《中国医疗设备》
2020年第7期45-48,共4页
China Medical Devices
基金
国家重点研发计划(2017YFC0112105)
军队项目(LB20191A060026)。
