9 March 2011 Affine invariant parameterization to assess local shape in abdominal organs
Author Affiliations +
Proceedings Volume 7965, Medical Imaging 2011: Biomedical Applications in Molecular, Structural, and Functional Imaging; 79650F (2011); doi: 10.1117/12.877589
Event: SPIE Medical Imaging, 2011, Lake Buena Vista (Orlando), Florida, United States
Abstract
We present a novel method for three-dimensional (3D) shape parameterization. The approach is affine invariant and is applied to comparing local shape across abdominal organs. The inherent structure of the abdominal organs is used to generate a regular sampling of the organ's surface. 'Planar-convexity' is defined for a general 3D closed object as the property that there exists a set of parallel planes which cover the 3D space such that every intersection of a plane with the object is a singular closed planar curve. We show that this parameterization, combined with the 3D analogue of a 2D shape descriptor, successfully shown to be invariant under affine transformations and noise, can be effectively used to compare features of two closed 3D surfaces point-to-point. The technique avoids common problems with the parameterization of concave surfaces and shows great potential for analyzing and improving the automatic modeling and segmentation of abdominal organs.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jeremy M. Watt, Marius George Linguraru, Ronald M. Summers, "Affine invariant parameterization to assess local shape in abdominal organs", Proc. SPIE 7965, Medical Imaging 2011: Biomedical Applications in Molecular, Structural, and Functional Imaging, 79650F (9 March 2011); doi: 10.1117/12.877589; https://doi.org/10.1117/12.877589
PROCEEDINGS
8 PAGES


SHARE
KEYWORDS
Shape analysis

Natural surfaces

Image segmentation

Liver

Databases

Kidney

Optical spheres

Back to Top