Comparative Analysis of Performance for Varian Millennium-MLC
Before and After Carriage Lubricant Filming
CAO Zhong1, LUO Guangwen2, JIN Mingxin1, ZHANG Kunyi2
1.Department of Radiotherapy, Hainan Cancer Hospital, Haikou Hainan 570312, China;
2.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
Abstract：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 decreased 13% and 9.7% for side
A and side B, respectively. Number of leaves which maximum PWM between 8 and 10 increased 30%, and none of them exceed 16.
Six months failures decreased 61.5%. 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.
曹忠1，罗广文2，金明信1，张焜毅2. Varian Millennium-MLC导槽镀膜升级前后性能比较[J]. 中国医疗设备, 2017, 32(12): 106-108.
CAO Zhong1, LUO Guangwen2, JIN Mingxin1, ZHANG Kunyi2. Comparative Analysis of Performance for Varian Millennium-MLC
Before and After Carriage Lubricant Filming. China Medical Devices, 2017, 32(12): 106-108.
