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Artificial Intelligence
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Computer Vision, Graphics, and Image Processing
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Computer Vision, Graphics, and Image Processing
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Pattern Recognition Letters
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Artificial Intelligence
Epicardial surface estimation from coronary angiograms
Computer Vision, Graphics, and Image Processing
Computer Vision
Physically Based Models with Rigid and Deformable Components
IEEE Computer Graphics and Applications
Animated 3D-Model of the Human Heart Based on Echocardiograms
ASST '87 Aachener Symposium für Signaltheorie: Mehrdimensionale Signale und Bildverarbeitung
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IEEE Transactions on Pattern Analysis and Machine Intelligence
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IEEE Transactions on Pattern Analysis and Machine Intelligence
On Recovering Hyperquadrics from Range Data
IEEE Transactions on Pattern Analysis and Machine Intelligence
MMBIA '96 Proceedings of the 1996 Workshop on Mathematical Methods in Biomedical Image Analysis (MMBIA '96)
Inferring the left ventricle dynamical behavior using a free-form deformations model
Mathematics and Computers in Simulation
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Modeling left ventricle shape from 2D CT images using wavelets and mean regular hexagon
Proceedings of the 7th International Conference on Frontiers of Information Technology
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This paper presents an approach to the modeling, analysis, and visualization of left ventricle motion and deformation. The authors' modeling of left ventricle shape and motion as a hierarchical representation enables them to develop a promising noninvasive technique for monitoring heart dynamics where both image analysis and image synthesis are involved. The proposed hierarchical motion model of left ventricle is constructed by combining several existing simple models and is able to capture major motion and deformation components of the left ventricle. The hierarchical decomposition characterizes the left ventricle motion and deformation in a coarse-to-fine fashion and leads to computationally efficient estimation algorithms. The authors estimate the global rigid motion of the left ventricle by establishing a time-varying object-centered coordinate system. The global deformations of the left ventricle are obtained by fitting the given data to superquadric modeling primitives. The local deformations are estimated by a tensor-description approach that is based on the locally deformable surface obtained by constructing spherical harmonic local surface from the residues of global shape estimation. The authors also describe in this paper methods of image synthesis and dynamic animation for visualizing the estimated results of the time-varying left ventricle shape, motion, and deformations. These animation results are consistent with the apparent motion pattern of the left ventricle and therefore show the success of the authors' hierarchical decomposition based approach.