Varian Millennium-MLC导槽镀膜升级前后性能比较  

Comparative Analysis of Performance for Varian Millennium-MLC Before and After Carriage Lubricant Filming

作　　者：曹忠 罗广文[2] 金明信 张焜毅[2] CAO Zhong;LUO Guangwen;JIN Mingxin;ZHANG Kunyi(Department of Radiotherapy, Hainan Cancer Hospital, Haikou Hainan 570312, China;Department of Radiotherapy, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China,Collaborative Innovation Center of Cancer Medicine, Guangzhou Guangdong 510060, China)

机构地区：[1]海南省肿瘤医院放疗科,海南海口570312 [2]中山大学肿瘤防治中心华南肿瘤学国家重点实验室肿瘤医学协同创新中心放疗科,广东广州510060

出　　处：《中国医疗设备》2017年第12期106-108,123,共4页China Medical Devices

摘　　要：目的通过跟踪Varian Millennium-多页准直器(Multi-Leaf Collimator,MLC)导槽镀膜升级前后叶片驱动电机PWM值以及MLC故障次数,对比分析镀膜升级前后MLC的性能变化。方法对一台多页准直器导槽镀膜升级,分别记录和分析升级前后的各叶片驱动电机的PWM值和升级前后半年的MLC故障次数。结果 A面平均PWM值下降13%,B面平均PWM值下降9.7%,PWM最大值在8~10之间的叶片增加30%,且升级后无PWM最大值大于16的叶片;半年比较发现MLC故障次数下降61.5%。结论对多页准直器导槽镀膜升级可以有效减少叶片运动阻力,进而减少MLC故障频率,从而达到减少治疗过程中停机时间的目的。Objective To analyze the change of performance of Varian Millennium-MLC before and after lubricant filming,including the PWM of each leaf’s driving motor and failures.Methods Lubricant filming was performed on a Millennium-MLC carriage,PWM of each leaf’s motor was tested and recorded before and after lubricant filming.failure frequency of six months for multi-leaf collimator before and after lubricant filming was collected.Results The average PWM of all leaves decreased13%and9.7%for side A and side B,respectively.Number of leaves which maximum PWM between8and10increased30%,and none of them exceed16.Six months failures decreased61.5%.Conclusion Lubricant filming on Millennium-MLC reduces movement friction of leaves and MLC failures significantly.Therefore,the purpose of reducing downtime during treatment is achieved.

关 键 词：多页准直器 调强放疗 驱动电机 驱动电流 故障频率 

分 类 号：TH741.1[机械工程—光学工程]