基于模糊PID的新型剂量率控制输出算法  

The New Output Dose Rate Control Algorithm Based on Fuzzy PID

作　　者：赵利利 秦嘉川 宋迎新 纪东泽 成希革 

机构地区：[1]山东新华医疗器械股份有限公司放射治疗事业部,淄博250086

出　　处：《中国医疗器械信息》2015年第7期42-45,共4页China Medical Device Information

基　　金：项目编号:先进肿瘤治疗装备和材料研发;项目编号:2012BAI15B00;课题名称:实时影像引导放疗系统研发;课题编号:2012BAI15B01

摘　　要：医用电子直线加速器的剂量输出模块是放射治疗的重要部分之一。剂量监测是将X辐射应用于放射治疗的基础,而人体的肿瘤的吸收剂量是无法直接测量的,因此,人们使用电离室间接计算吸收剂量。而人体肿瘤接受的剂量是通过医用电子直线加速器的剂量输出系统输出稳定可调的剂量率来达到目标剂量[1]。同样,稳定准确的剂量输出信号才能使治疗更加高效可靠,因此剂量输出模块稳定的剂量输出,对于使肿瘤细胞达到预期的剂量,提高医用电子直线加速器的性能有很大的作用[2]。本文采用模糊PID控制的方法对剂量输出模块做出了优化计算,使整个伺服系统更加稳定可靠,使剂量监测模块的计算更加平滑真实,并在应用电子直线加速器上做了实验,效果良好。Radiotherapy dose output module is one of the important parts of medical electron linear accelerator. Dose monitoring is the basis of applying X radiation to radiation therapy, and the absorbed dose of the tumor in the human body cannot be measured directly, people calculate the absorbed dose indirectly by the ionization chamber. And the target dose of tumor in the human body is achieved by the dose output system of the medical electron linear accelerator[1]. Stable and accurate dose output signal make the treatment more effective and reliable. therefore the stable output dose, make the tumor cels easy to achieve the target dose, and has great effect on improving the performance of medical electron linear accelerator[2]. In this paper, the dose output module optimized calculation adopts the method of fuzzy PID control, makes the servo system more stable and reliable, and makes the calculation of the dose monitoring module more smooth and real, And apply on the electron linear accelerator with a good effect.

关 键 词：剂量监测 剂量率 PID 吸收剂量 目标剂量 电子直线加速器 输出模块 伺服系统 电离室 人体肿瘤 

分 类 号：TP312[自动化与计算机技术—计算机软件与理论]