计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (19): 203-206.

• 图形、图像、模式识别 • 上一篇    下一篇

一种简化的调强强度图谱计算方法及实现

刘 迎,韩忠明,戴明利,黄今慧,孙践知   

  1. 北京工商大学 计算机与信息工程学院,北京 100048
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-07-01 发布日期:2011-07-01

Simplified method and its implementation on computation of intensity map

LIU Ying,HAN Zhongming,DAI Mingli,HUANG Jinhui,SUN Jianzhi   

  1. College of Computer & Information Engineering,Beijing Technology & Business University,Beijing 100048,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-07-01 Published:2011-07-01

摘要: 优化算法是适形调强放射治疗(IMRT)软件系统的核心。模糊权重算法是一种优化算法,但该算法存在一个缺陷——剂量强度图谱分布上有锯齿现象。在原有模糊权重优化算法基础上提出一种简化方法。采用线性主射束替代三维锥形射束的方法消除了锯齿现象。实验结果表明,该算法在优化速度和优化结果上有很大的改进。

关键词: 调强图谱, 优化, 适形调强放射治疗, 放射治疗计划系统

Abstract: Optimization is the kernel of Intensity Modulated Radiation Therapy(IMRT) software system.Fuzzy weight function algorithm is used for optimization,but it suffers a shortcoming of sawtooth dose intensity map distribution.A simplified method based on fuzzy weight function is proposed in this paper.3D taper beam is replaced with line beam in the new method,which can avoid sawtooth phenomenon.The experimental results show the efficiency and effectiveness of the new method.

Key words: intensity map, optimize, Intensity Modulated Radiation Therapy(IMRT), Radio Therapy Planning System(RTPS)