Multivariate High-Dimensional Cortical Folding Analysis, Combining Complexity and Shape, in Neonates with Congenital Heart Disease

Authors:
Suyash P. Awate;Paul Yushkevich;Zhuang Song;Daniel Licht;James C. Gee
Affiliations:
Penn Image Computing and Science Lab (PICSL), University of Pennsylvania,;Penn Image Computing and Science Lab (PICSL), University of Pennsylvania,;Penn Image Computing and Science Lab (PICSL), University of Pennsylvania,;Children's Hospital of Philadelphia, USA;Penn Image Computing and Science Lab (PICSL), University of Pennsylvania,
Venue:
IPMI '09 Proceedings of the 21st International Conference on Information Processing in Medical Imaging
Year:
2009

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Abstract

The paper presents a novel statistical framework for cortical folding pattern analysis that relies on a rich multivariate descriptor of folding patterns in a region of interest (ROI). The ROI-based approach avoids problems faced by spatial-normalization-based approaches stemming from the severe deficiency of homologous features between typical human cerebral cortices. Unlike typical ROI-based methods that summarize folding complexity or shape by a single number, the proposed descriptor unifies complexity and shape of the surface in a high-dimensional space. In this way, the proposed framework couples the reliability of ROI-based analysis with the richness of the novel cortical folding pattern descriptor. Furthermore, the descriptor can easily incorporate additional variables, e.g. cortical thickness. The paper proposes a novel application of a nonparametric permutation-based approach for statistical hypothesis testing for any multivariate high-dimensional descriptor. While the proposed framework has a rigorous theoretical underpinning, it is straightforward to implement. The framework is validated via simulated and clinical data. The paper is the first to quantitatively evaluate cortical folding in neonates with complex congenital heart disease.