摘要
胸肺部或者上腹部的生理运动,特别是呼吸运动,造成靶区内的剂量与预定剂量之间产生差别,这种差别造成肿瘤得不到有效的治疗,而且还将造成周围正常组织受到射线的照射。本文探讨一种利用数学模型编写程序来控制单片机从而控制步进电机,步进电机通过传动机构带动可移动平台使其能实时地按器官运动规律逆向同步地运动,以抵消呼吸运动造成的器官组织运动,减小呼吸运动对放疗精度的影响。
Physiological motions of organs in thorax lung and upper abdomen, especially respiratory movement, make difference between planning and actual dosage which weaken the treatment effect and also bring about radiation exposure of proximate tissue. Structure the math model of organs and program to control single-chip microcomputer, and use single-chip microcomputer to control stepping motors which spur the removable equipment move in real-time and widdershins way through actuating mechanism that is the method investigated in this paper which call counteract the organs＇ motion as well as reduce the impact of respiratory movement on radiotherapy accuracy.
出处
《中国医疗器械信息》
2011年第2期15-17,共3页
China Medical Device Information
基金
2009上海市优青项目基金资助
关键词
放疗精度
数学模型
单片机
步进电机
可移动平台设备
radiotherapy accuracy, math model, single-chip microcomputer, stepping motor, removable equipment
