文献类型： 会议论文

第一作者： Combes, Benoit

作者： Combes, Benoit ¹ ; Fournier, Marc ² ; Kennedy, David N. ³ ; Braga, Jose; Roberts, Neil; Prima, Sylvain;

作者机构： 1.INSERM, U746, Faculté

2.de Mé

3.decine CS 34317, INRIA, VisAGeS, Univ. Rennes I, CNRS, UMR 6074, IRISA, France

关键词： EM-ICP;mean shape;point set;shape analysis;surface;symmetry

会议名称： IEEE International Symposium on Biomedical Imaging

主办单位：

页码： 1257-1263

摘要： In this paper, we propose a new approach to compute the mean shape of unstructured, unlabelled point sets with an arbitrary number of points. This approach can be seen as an extension of the EM-ICP algorithm, where the fuzzy correspondences between each point set and the mean shape, the optimal non-linear transformations superposing them, and the mean shape itself, are iteratively estimated. Once the mean shape is computed, one can study the variability around this mean shape (e.g. using PCA) or perform statistical analysis of local anatomical characteristics (e.g. cortical thickness, asymmetry, curvature). To illustrate our method, we perform statistical shape analysis on human osseous labyrinths and statistical analysis of global cortical asymmetry on control subjects and subjects with situs inversus.

分类号： TP391.4`TP391.4