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Special GRASP Seminar – Weichuan Yu, Hong Kong University, “A Coupled Filtering Method for Solving the Feature-Motion Decorrelation Problem in Ultrasound Speckle Tracking”

April 7, 2010 @ 12:00 pm - 1:00 pm

Abstract: In ultrasound image-based tissue deformation analysis, feature-motion decorrelation causes feature tracking results fail to represent the underlying true tissue deformation. We propose a new coupled filtering method to solve the feature-motion decorrelation problem. After explicitly modeling image variations caused by tissue deformation, we filter the image before tissue deformation and the warped image after tissue deformation with a pair of filters, respectively. We show through theoretical derivation that the two filtered images are identical to each other. Since the coupled filtering method keeps tissue deformation parameters, feature-based tracking is able to accurately estimate the parameters of underlying tissue deformation. Experiments in elastography studies show that our method is superior over previous methods.


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Weichuan Yu received his Ph.D. degree in Computer Vision and Image Analysis from University Kiel, Germany in 2001. He was a postdoctoral associate at Yale University from 2001 to 2004, and a research faculty member in the Center for Statistical Genomics and Proteomics at Yale University from 2004 to 2006. Since August 2006, he has been with the faculty in the Department of Electronic and Computer Engineering at the Hong Kong University of Science and Technology.

He is interested in computational analysis problems with biological and medical applications. He has published around 50 journal articles and referred conference papers on a variety of topics including bioinformatics, computational biology, biomedical imaging, signal processing, pattern recognition and computer vision. He was the recipient of the DAAD (German Academic Exchange Center) Fellowship.


April 7, 2010
12:00 pm - 1:00 pm
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