摘要
针对分次放疗过程中患者的体位移动问题,设计实现了基于机器视觉的放射治疗体位移动监测系统。该系统将三台相机分别置于放射治疗床的两侧及床尾部的中上方,由红外LED提供主动照明,实时采集放疗过程中的图像。采用基于归一化互相关模板匹配算法对预先置于患者体膜两侧及中部的标记物进行实时跟踪。现场实验结果表明,该系统的测量平均误差为0.008 mm,标准差为0.028 mm,可用于在放射治疗过程中对患者微小体位移动的实时监测。
A machine vision-based displacement monitoring system for radiotherapy is designed and implemented to address the patient's body position movement during fractionated radiotherapy.The system places three cameras on the two sides of the radiotherapy table and the middle and upper part of the end of the bed,with active illumination provided by infrared LEDs,to capture images during radiotherapy in real time.A normalized cross correlation-based template matching algorithm is used to track markers pre-positioned on both sides and in the middle of the patient's body membrane in real time.Field experimental results show that the system has a measurement mean error of o.008 mm and a standard deviation of 0.028 mm,and can be used for real-time monitoring of minute patient body movement during radiotherapy.
作者
吴祖伟
黄少胜
林贤锦
王少锋
王磊
林春
WUZu-wei;HUANG Shao-sheng;LIN Xian-jin;WANG Shao-feng;WANG Lei;LIN Chun(Pen-Tung Sah Institute of Micro-Nano Science and Technology,Xiamen University,Xiamen 361102,China;Department of Oncology Radiotherapy,The Second Affiliated Hospital of Xiamen Medical College,Xiamen 361021,China;School of Areospace Engineering,Xiamen University,Xiamen 361102,China)
出处
《光学与光电技术》
2024年第2期64-72,共9页
Optics & Optoelectronic Technology
基金
厦门市医疗卫生指导性项目(3502Z20209171)资助。
关键词
机器视觉
放射治疗
体位移动
模板匹配
实时监测系统
machine vision
radiation therapy
displacement monitoring
template matching
real-time monitoring system
