Efficient Similarity Retrieval for Temporal Shape Sequences: A Case Study using Cardiac MR Images
Heng Huang; Makedon, F.; Ford, J.; Li Shen; Yuhang Wang; Steinberg, T.; Ling Gao; Pearlman, J.
Engineering in Medicine and Biology Society, 2004. IEMBS apos;04. 26th Annual International Conference of the IEEE
Volume 2, Issue , 1-5 Sept. 2004 Page(s): 3250 - 3253
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Summary: The spherical harmonics (SPHARM) approach has been used for the representation of shapes in many types of biomedical image data. We propose a SPHARM-based similarity comparison for shape sequences that allows fast similarity searches for dynamic objects and demonstrate it using 3D images of a beating heart. By using spherical harmonics to extract a small number of features that represent cardiac shape in each sequential state, we enable indexing and pruning of database entries with a multidimensional index tree (e.g. R*-tree) for fast retrieval. Our approach relies on obtaining selected landmarks to allow normalization within and between sequences. This framework is extensible to other application domains.

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