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2016 | OriginalPaper | Buchkapitel

Hierarchical Generative Modeling and Monte-Carlo EM in Riemannian Shape Space for Hypothesis Testing

verfasst von : Saurabh J. Shigwan, Suyash P. Awate

Erschienen in: Medical Image Computing and Computer-Assisted Intervention - MICCAI 2016

Verlag: Springer International Publishing

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Abstract

Statistical shape analysis has relied on various models, each with its strengths and limitations. For multigroup analyses, while typical methods pool data to fit a single statistical model, partial pooling through hierarchical modeling can be superior. For pointset shape representations, we propose a novel hierarchical model in Riemannian shape space. The inference treats individual shapes and group-mean shapes as latent variables, and uses expectation maximization that relies on sampling shapes. Our generative model, including shape-smoothness priors, can be robust to segmentation errors, producing more compact per-group models and realistic shape samples. We propose a method for efficient sampling in Riemannian shape space. The results show the benefits of our hierarchical Riemannian generative model for hypothesis testing, over the state of the art.

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Metadaten
Titel
Hierarchical Generative Modeling and Monte-Carlo EM in Riemannian Shape Space for Hypothesis Testing
verfasst von
Saurabh J. Shigwan
Suyash P. Awate
Copyright-Jahr
2016
DOI
https://doi.org/10.1007/978-3-319-46726-9_23