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Fast and effective retrieval of medical tumor shapes

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5 Author(s)
Korn, P. ; Shannon Lab., AT&T Bell Labs., Florham Park, NJ, USA ; Sidiropoulos, N. ; Faloutsos, C. ; Siegel, E.
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Investigates the problem of retrieving similar shapes from a large database; in particular, we focus on medical tumor shapes (finding tumors that are similar to a given pattern). We use a natural similarity function for shape matching, based on concepts from mathematical morphology, and we show how it can be lower-bounded by a set of shape features for safely pruning candidates, thus giving fast and correct output. These features can be organized in a spatial access method, leading to fast indexing for range queries and nearest-neighbor queries. In addition to the lower-bounding, our second contribution is the design of a fast algorithm for nearest-neighbor searching, achieving significant speedup while provably guaranteeing correctness. Our experiments demonstrate that roughly 90% of the candidates can be pruned using these techniques, resulting in up to 27 times better performance compared to sequential scanning

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Knowledge and Data Engineering, IEEE Transactions on  (Volume:10 ,  Issue: 6 )