Integrated Shape Corresponding Information by Landmark Sliding for Non-rigid Registration between CT and Ultrasound Images

摘要：

Non-rigid registration between CT and ultrasoundimages is a difficult task due to the low resolution andcontrast of ultrasound images.We present a methodincorporating the shape information of contoursextracted from the image pairs for the registration.Firstly,the shapes are represented by theautomatically detected landmarks along the contour ofsegmented object on CT and ultrasound images.Secondly,the landmarks are corresponded bylandmark sliding and the negative mean squareddistance of the corresponding landmarks is used as theshape similarity measure.Finally,the integratedsimilarity metric for registration combines mutualinformation,shape similarity and smoothnessconstraint.The experiment results show thatregistration accuracy using the integrated similarity ishigher than using only mutual information with nearlysame execution time.It is verified that the shapeinformation could improve the registration resultsbetween CT and ultrasound images.

作者: Su Zhang Wei Yang Xuesong Lu Yazhu Chen

作者单位: Dept.of Biomedical Engineering,Shanghai Jiao Tong Univ.,Shanghai,China,200240

会议类型: 国际会议

会议名称: 2008 3rd International Conference on Intelligent System and Knowledge Engineering(第三届智能系统与知识工程国际会议)(ISKE 2008)

会议地点: 厦门

会议语种:英文

页码: 1130-1135

在线出版日期: 2008-11-17（万方平台首次上网日期，不代表论文的发表时间）