基于Legendre正交矩的配准方法在放疗导航中的应用研究  

A Fast Matching Way Using the Legengre Orthogonal Moment and Application in Image Guided Radiotherapy

作　　者：葛云[1] 章东[1] 

机构地区：[1]南京大学电子科学与工程系,江苏南京210093

出　　处：《电子学报》2009年第7期1529-1531,共3页Acta Electronica Sinica

基　　金：江苏省教育厅产业化资助项目(No.JHB06-01)

摘　　要：放疗导航在放射治疗的摆位精度、实时性、数字化中有着重要的应用前景,而精确配准是实施放疗导航的前提.本文提出一种基于Legendre矩的快速配准方法,用于放疗导航的红外实时跟踪.文中首先介绍了该方法的实现步骤;然后将该方法和传统松弛法进行了模拟计算和实验比较,新方法在降低误识别率及避免病态方程方面,具有明显的优越性;最后将该方法应用于临床放疗导航系统中,在精确度和实时性方面取得了满意的临床应用结果.Image guided radiotherapy （IGRT） has a wide application in numeric radiotherapy with high locating accuracy and real time track. Exact matching is the precondition of IGRT. This paper presents a new way of fast registration using the Legendre moment, and monitoring the patient in real time by detecting and tracking infrared markers. Firstly, the steps of the new way are introduced. Secondly, compared to the traditional means about relaxation, the new way has obvious advantages in reducing misidentification ratio and escaping ill-conditioned equations. Lastly,the effectiveness about accuracy and real time track,have been testified in clinic application using the new way.

关 键 词：LEGENDRE矩 图象配准 图象引导放疗 实时跟踪 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]