Optimization of ripple filter for pencil beam scanning

作     者：YANG Zhaoxia ZHANG Manzhou LI Deming 

作者机构：Shanghai Institute of Applied PhysicsChinese Academy of Sciences 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2013年第24卷第6期

页      面：94-98页

核心收录：

学科分类：080902[工学-电路与系统] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0822[工学-轻工技术与工程] 

主　　题：优化策略 滤波器 扫描 铅笔 波纹 最小二乘法 二次规划 截面形状 

摘      要：This paper presents a novel approach to seek the bar width for ripple filter used in pencil beam scanning proton therapy.A weight decay quadratic programming method is employed for the new optimization *** to the commonly used iterative-least-square technique,the ripple filter derived by the proposed method not only has better depth dose uniformity,i.e.,the dose uniformity is within 0.5%,but also has triangle-like vertical cross-sectional shape which is suitable for ***,the new method has such good robust characteristics that it is also applicable to the real application with unavoidable measurement errors and *** simulation results of this study may be helpful in improving the design of the ripple filter.