基于多特征支持向量机和弹性区域生长的膝软骨自动分割  

Automatic segmentation of articular cartilages using multi-feature SVM and elastic region growing

作　　者：王品[1] 何璇[1] 吕洋[1] 李勇明[1,2] 邱明国[2] 刘书君[1] 

机构地区：[1]重庆大学通信工程学院,重庆400044 [2]第三军医大学生物医学工程学院,重庆400038

出　　处：《吉林大学学报（工学版）》2016年第5期1688-1696,共9页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(61108086;11304382);中国博士后科学基金项目(2013M532153);重庆市自然科学基金项目(CSTC 2012jjA40015);重庆市科技攻关计划项目(cstc2012gg-yyjs0572);中央高校基本科研业务费项目(CDJZR12160011;CDJZR13160008;CDJZR155507)

摘　　要：为了从膝关节磁共振图像(MRI)中分割出膝软骨,提出一种基于多特征支持向量机(SVM)边缘定位和弹性区域生长的自动分割算法。首先,采用自适应Canny边缘检测算法提取图像主要边缘;再对边缘提取多个图像特征,结合SVM算法对边缘进行分类,完成软骨边缘定位;然后,在软骨边缘的基础上进行种子点及软骨像素区域的选择;之后基于选择的结果采用弹性区域生长进行初步软骨分割;最后,基于先验知识和形态学获得最终膝软骨分割结果。实验结果表明:该算法能够准确、快速地自动分割出膝关节MRI中不同的膝软骨,其中股软骨、胫软骨、髌软骨的平均评价重要指标(DSC)分别可达0.8543、0.8280、0.8703,与手工分割结果具有较高的一致性。We present an algorithm that automatically and accurately segments the cartilages from Magnetic Resonance Images（MRI）of knees using multi-feature Support Vector Machine（SVM）and elastic region growing.First,adaptive canny edge detection is used to extract the main edges of the images.Second,the edge features are extracted and the edges are classified with SVM to complete the location of the cartilage edges.Then,based on the cartilage edges,the seeds and regions of the cartilage are chosen,and the preliminary segmentation of knee cartilages is achieved using the elastic region growing.Finally,the priori knowledge and morphology are used to improve the preliminary segmentation results.Experimental results show that the proposed method can accurately and rapidly segment the knee cartilages with high consistency with manual segmentation results.The proposedmethod obtains average DSC values of 0.8543,0.8280 and 0.8703 for the femoral,tibial and patellar cartilages.

关 键 词：信息处理技术 多特征支持向量机 弹性区域生长 膝软骨自动分割 

分 类 号：TN911.73[电子电信—通信与信息系统] R445.2[电子电信—信息与通信工程]