螺旋断层放疗系统多叶准直器叶片的性能分析  

Performance Analysis of MLC Helical Tomotherapy

作　　者：张金葆[1] 卢爱国[1] 

机构地区：[1]北京军区总医院医学工程科,北京100700

出　　处：《医疗卫生装备》2010年第10期128-129,共2页Chinese Medical Equipment Journal

摘　　要：目的:研究螺旋断层放疗系统的气动二元MLC叶片的设计和机械特性。方法:分析了气动二元多叶准直器叶片的重要参数,如叶片宽度、叶片速度、漏射和透射以及叶片运动产生的延迟效应。结果:气动二元MLC叶片的机械结构是为螺旋断层调强放疗的实施专门设计的。MLC叶片的延迟的准确建模保证了剂量计算的准确性。结论:气动二元多叶准直器是实现螺旋断层调强放疗理想的部件。Objective To study the mechanical characteristics of the pneumatic binary MLC of helical tomotherapy.Methods The important parameters including leaf width,leaf speed,transmission and delayed effect were analyzed.Results The mechanical structure of the helical tomotherapy pneumatic binary MLC was designed specially for IMRT delivery in helical tomotherapy form.The modeling of leaf delayed effect assures the accuracy of dose calculation.Conclusion Pneumatic binary MLC is ideal for IMRT using helical tomotherapy.

关 键 词：螺旋断层放疗 二元多叶准直器 调强放疗 

分 类 号：TH774[机械工程—仪器科学与技术] TP302.7[机械工程—精密仪器及机械]