Deformable Mesh based Motion Tracking for Ultrasound Strain Imaging
In this paper,we propose a method to estimate tissue motion from ultrasound images.The original image sequence is processed before the motion tracking in order to reduce decorrelation noise and enhance the images.The first image of the sequence will be used to generate structure energy,which represents the quality of locations for motion tracking.A mesh will be laid on the images uniformly at first,then the mesh nodes will be adjusted according to the structure energy.Every four tracking nodes are used to form one mesh node by interpolation in order to reduce errors.Motion tracking is performed on the processed image sequence using basic sum-absolute-difference (SAD) algorithm in order to ensure the efficiency.Mesh nodespositions are then obtained from every four tracking nodes to generate deformable tracking mesh.The motion result is used to calculate strain of the tissue.In displaying the ultrasound elastography,we suppress the strain errors according to the globe motion and strain level.In vivo B-Mode image sequences are used to verify the quality and efficiency of the method.
ultrasound image motion tracking deformable mesh strain imaging elastography
Zhiqiang Jiang Dong C.Liu
Ultrasound Medical Imaging Lab,Sichuan University,Chengdu,China
国际会议
7th Asian-Pacific Conference on Medical and Biological Engineering(第七届亚太地区生物工程学术会议)
北京
英文
2008-04-22（万方平台首次上网日期，不代表论文的发表时间）