基于改进的Live-Wire算法在ARPlanner中的应用  

Application of Improved Live-Wire Algorithm in ARPlanner

作　　者：汪欣 康世功 郎锦义[3] WANG Xin;KANG Shigong;LANG Jinyi(Beijing Allcure Medical Technology Group Co.,Ltd.,Beijing 100013,China;US-China Tumor Diagnosis&Treatment Tech.Innovation Research Institute,Beijing 100013,China;Sichuan Cancer Hospital,Chengdu Sichuan 610041,China)

机构地区：[1]北京全域医疗技术集团有限公司,北京100013 [2]美中肿瘤诊疗技术创新研究院,北京100013 [3]四川省肿瘤医院,四川成都610041

出　　处：《中国医疗设备》2020年第4期60-64,共5页China Medical Devices

基　　金：国家重点研发计划(2017YFC0113100)。

摘　　要：在精准放疗中,医生在勾画靶区以及危及器官时需要进行大量的修改工作,极大地降低了医生的工作效率与靶区的精准度。为此,本文改进了Live-Wire算法,将梯度幅值的计算由原算法中的水平方向和垂直方向改进为由水平方向、45°方向、垂直方向和135°方向来计算,并将改进的算法运用到ARPlanner软件中,用来交互式勾画患者的危及器官以及靶区。本文将改进的算法与原算法进行了对比,实验结果表明,改进的算法能更准确的检测到组织的边缘。In precision radiotherapy,doctors need to make a lot of modifications when sketching the target area and organs at risk,which greatly reduces the working efficiency of doctors and the accuracy of the target area.Therefore,this paper improved the Live-Wire algorithm,and improved the calculation of gradient amplitude from the horizontal direction and vertical direction in the original algorithm to the horizontal direction,45°direction,vertical direction and 135°direction.The improved algorithm was applied to the ARPlanner software to interactively sketch the organ at risk and the target area of patients.This paper compared the improved algorithm with the original algorithm,and the experimental results showed that the improved algorithm could more accurately detect the edge of the organization.

关 键 词：Live-Wire算法 ARPlanner软件 梯度幅值 

分 类 号：R318[医药卫生—生物医学工程]