实时三维超声心动图中二尖瓣的提取  

Mitral Valve Extraction for Real 3D Echocardiography

作　　者：高艳[1] 杨新[1] 尚岩峰[1] 吴兰平[2] 孙锟[2] 

机构地区：[1]上海交通大学图像处理与模式识别研究所,上海200240 [2]上海交通大学儿童医学中心,上海200127

出　　处：《数据采集与处理》2007年第3期304-308,共5页Journal of Data Acquisition and Processing

摘　　要：二尖瓣的复杂结构和不规则运动特性使得自动提取非常困难,因而依据二尖瓣解剖形状的先验知识,采用人机交互方式构造符合二尖瓣生理形状的柱状区域,把该区域作为测地活动轮廓模型的区域约束项,在leve l set框架下对二尖瓣进行分割提取。该方法通过对大量三维超声瓣膜进行实验,取得了良好的分割效果,能够直接准确提取三维心脏二尖瓣。A technique for extracting the mitral valve in the real time three-dimensional echocardiography is proposed. A geodesic active contours model based on region constraint is used in the developed method. With the shape prior knowledge and the motion boundary of the mitral valve in every feature frame the constraint points are interactively selected in the directions of sagittal plane and coronal plane for constructing a pillar region. Then, the pillar region is served as the constraint item for geodesic active contours and the mitral valve is extracted in 3D level set frame. Experiments show that the mitral valve can be accurately extracted and the approach is helpful in the medical clinic of the mitral valve disease diagnosis.

关 键 词：实时三维超声心动图 3D分割 区域约束 测地活动轮廓模型 二尖瓣 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]