Document Detail

Nondistorting flattening maps and the 3-D visualization of colon CT images.
MedLine Citation:
PMID:  11055781     Owner:  NLM     Status:  MEDLINE    
In this paper, we consider a novel three-dimensional (3-D) visualization technique based on surface flattening for virtual colonoscopy. Such visualization methods could be important in virtual colonoscopy because they have the potential for noninvasively determining the presence of polyps and other pathologies. Further, we demonstrate a method that presents a surface scan of the entire colon as a cine, and affords the viewer the opportunity to examine each point on the surface without distortion. We use certain angle-preserving mappings from differential geometry to derive an explicit method for flattening surfaces obtained from 3-D colon computed tomography (CT) imagery. Indeed, we describe a general method based on a discretization of the Laplace-Beltrami operator for flattening a surface into the plane in a conformal manner. From a triangulated surface representation of the colon, we indicate how the procedure may be implemented using a finite element technique, which takes into account special boundary conditions. We also provide simple formulas that may be used in a real-time cine to correct for distortion.
S Haker; S Angenent; A Tannenbaum; R Kikinis
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  IEEE transactions on medical imaging     Volume:  19     ISSN:  0278-0062     ISO Abbreviation:  IEEE Trans Med Imaging     Publication Date:  2000 Jul 
Date Detail:
Created Date:  2001-01-31     Completed Date:  2001-03-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8310780     Medline TA:  IEEE Trans Med Imaging     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  665-70     Citation Subset:  IM    
Department of Diagnostic Radiology, Yale University, New Haven, CT 06520, USA.
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MeSH Terms
Colon / radiography*
Finite Element Analysis
Imaging, Three-Dimensional*
Models, Theoretical
Tomography, X-Ray Computed / methods*
Erratum In:
IEEE Trans Med Imaging 2000 Dec;19(12):1267

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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