Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/111238
Title: Closed geometric models in medical applications
Authors: Jagannathan, Lakshmipathy
Nowinski, Wieslaw L. 
Raphel, Jose K. 
Nguyen, Bonnie T. 
Issue Date: 1996
Citation: Jagannathan, Lakshmipathy,Nowinski, Wieslaw L.,Raphel, Jose K.,Nguyen, Bonnie T. (1996). Closed geometric models in medical applications. Proceedings of SPIE - The International Society for Optical Engineering 2707 : 14-20. ScholarBank@NUS Repository.
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.
Source Title: Proceedings of SPIE - The International Society for Optical Engineering
URI: http://scholarbank.nus.edu.sg/handle/10635/111238
ISBN: 0819420824
ISSN: 0277786X
Appears in Collections:Staff Publications

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