虚拟内窥镜心脏超声图像滤波和分割方法评价  

Methodological study on filtering and segmentation of three-dimensional echocardiographic images by virtual endoscopy

作　　者：薛海虹[1] 陈滨津[2] 孙锟[1,3] 余建国[2] 

机构地区：[1]上海交通大学医学院附属新华医院儿科心脏中心,上海200092 [2]复旦大学电子工程系,上海200433 [3]上海交通大学医学院附属上海儿童医学中心心内科,上海200127

出　　处：《上海交通大学学报（医学版）》2011年第2期169-172,共4页Journal of Shanghai Jiao tong University:Medical Science

基　　金：国家自然科学基金(30371497)~~

摘　　要：目的对虚拟内窥镜心脏超声图像滤波和图像分割方法进行评价。方法对30例小儿心脏三维超声数据进行滤波和图像分割,分别采用光线投射法、光线投射法(梯度阈值3～19)、光线投射法(梯度阈值3～6)及滤波并分类后的光线投射法(梯度阈值3～6),对显示结果进行比较。结果显示效果较好者为滤波并采用聚类法分类后光线投射法,其显示的结果(如二尖瓣、三尖瓣以及房间隔缺损)十分清晰。结论对虚拟内窥镜心脏超声图像预处理时,宜采用滤波、聚类法分类后光线投射法。Objective To assess filtering and segmentation of three-dimensional echocardiographic images by virtual endoscopy. Methods Filtering and segmentation were performed for three-dimensional echocardiographic images of 30 children.Three-dimensional echocardiographic heart models were reconstructed by four different methods: ray-casting algorithm,ray-casting algorithm(gradient threshold ranged 3-19),ray-casting algorithm(gradient threshold ranged 3-6)and ray-casting algorithm(visualization after filtering and classification,gradient threshold ranged 3-6).Visualization results were compared. Results Ray-casting algorithm with visualization after filtering and classification performed better than the other methods,and the visible heart models showed precisely anatomy structure and spatial relationship including mitral valve,tricuspid valve and atrial septal defect. Conclusion Filtering and classification is helpful for visualization of three-dimensional echocardiographic virtual endoscopy.

关 键 词：虚拟内窥镜 滤波 分割 三维超声心动图 

分 类 号：R445.1[医药卫生—影像医学与核医学]