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Proceedings Paper

Closed geometric models in medical applications
Author(s): Lakshmipathy Jagannathan; Wieslaw L. Nowinski; Jose K. Raphel; Bonnie T. Nguyen
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Paper Abstract

Conventional surface fitting methods give twisted surfaces and complicates capping closures. This is a typical character of surfaces that lack rectangular topology. We suggest an algorithm which overcomes these limitations. The analysis of the algorithm is presented with experimental results. This algorithm assumes the mass center lying inside the object. Both capping closure and twisting are results of inadequate information on the geometric proximity of the points and surfaces which are proximal in the parametric space. Geometric proximity at the contour level is handled by mapping the points along the contour onto a hyper-spherical space. The resulting angular gradation with respect to the centroid is monotonic and hence avoids the twisting problem. Inter-contour geometric proximity is achieved by partitioning the point set based on the angle it makes with the respective centroids. Avoidance of capping complications is achieved by generating closed cross curves connecting curves which are reflections about the abscissa. The method is of immense use for the generation of the deep cerebral structures and is applied to the deep structures generated from the Schaltenbrand- Wahren brain atlas.

Paper Details

Date Published: 15 April 1996
PDF: 7 pages
Proc. SPIE 2707, Medical Imaging 1996: Image Display, (15 April 1996);
Show Author Affiliations
Lakshmipathy Jagannathan, National Univ. of Singapore (Singapore)
Wieslaw L. Nowinski, National Univ. of Singapore (Singapore)
Jose K. Raphel, National Univ. of Singapore (Singapore)
Bonnie T. Nguyen, National Univ. of Singapore (Singapore)

Published in SPIE Proceedings Vol. 2707:
Medical Imaging 1996: Image Display
Yongmin Kim, Editor(s)

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