Next: Introduction
A Bayesian Similarity Function for Segmentation using Anatomical, Shape-Based Models
FMRIB Technical Report TR05MJ1
Mark Jenkinson
Oxford Centre for Functional Magnetic Resonance Imaging of the Brain (FMRIB),
Department of Clinical Neurology, University of Oxford, John Radcliffe Hospital,
Headley Way, Headington, Oxford, UK
Abstract:
Shape-based segmentation involves fitting a flexible model of
anatomical shape to a measured image. It is important to be able to
utilise probabilistic prior information about shape, and to combine
this with data-driven likelihoods. This is naturally achieved within
the Bayesian framework. In this paper a probabilistic similarity
function for the anatomical, shape-based segmentation problem is
derived using a fully Bayesian approach. Furthermore, it incorporates
prior, probabilistic information without the need for
additional ad-hoc parameters. Preliminary results show that this
similarity function is more robust and accurate than simpler versions
based on the same image formation model.