动态多叶光栅叶片端面结构设计及半影分析  

Structural Design and Penumbra Analysis of Dynamic Multi-leaf Collimator Leaf End

作　　者：吕军 陈刘利[3,4] 温瑞军 龙鹏程 尚雷明 胡丽琴 LYU Jun;CHEN Liuli;WEN Ruijun;LONG Pengcheng;SHANG Leiming;HU Liqin(Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei,230031;University of Science and Technology of China,Hefei,230026;SuperAccuracy Science&Technology Co.Ltd.,Nanjing,210044;Institute of SuperAccuracy Advanced Technology Co.Ltd.,Hefei,230088)

机构地区：[1]中国科学院合肥物质科学研究院,合肥市230031 [2]中国科学技术大学,合肥市230026 [3]中科超精(南京)科技有限公司,南京市210044 [4]中科超精(安徽)先进技术研究院有限公司,合肥市230088

出　　处：《中国医疗器械杂志》2023年第4期377-382,共6页Chinese Journal of Medical Instrumentation

基　　金：南京江北新区重点研发计划项目(ZDYF20200219)。

摘　　要：动态多叶光栅具有放射线束整形的作用,是实施肿瘤精准放射治疗的关键执行部件,在提高放射治疗的精度、效率和质量方面起着核心作用。该文对一种圆弧面和平面组合的新型光栅叶片端面结构进行研究,发展了一种解析表达式和图形分析法结合的光栅叶片半影性能分析模型,量化分析了叶片端面结构对半影的影响关系,完成了一套动态多叶光栅的三维结构设计,并通过实验测量验证了结构设计和分析模型的可行性。Dynamic multi-leaf collimator,which has the function of radiation beam shaping,is a key executive component of tumor precise radiotherapy,and plays a core role in improving the accuracy,efficiency and quality of radiotherapy.A new type of collimator leaf end structure with circular arc and plane combination was studied,and collimator penumbra performance analysis model combining analytical expression and graphic analysis was developed.The influence of leaf end structure on penumbra was analyzed quantitatively,and a set of three-dimensional structure design of dynamic multi-leaf collimator was completed.The feasibility of the structural design and analysis model was verified through experimental measurements.

关 键 词：多叶光栅 放射治疗 漏射率 半影 

分 类 号：TH744[机械工程—光学工程] R197.39[机械工程—仪器科学与技术]