Markov random field modelling of fMRI data using a mean field EM-algorithm

Svensen, Markus; Kruggel, Frithjof J.; von Cramon, D. Yves

doi:10.1007/3-540-48432-9_22

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Markov random field modelling of fMRI data using a mean field EM-algorithm

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Svensen, Markus
MPI of Cognitive Neuroscience (Leipzig, -2003), The Prior Institutes, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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Kruggel, Frithjof J.
MPI of Cognitive Neuroscience (Leipzig, -2003), The Prior Institutes, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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von Cramon, D. Yves
MPI of Cognitive Neuroscience (Leipzig, -2003), The Prior Institutes, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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引用

Svensen, M., Kruggel, F. J., & von Cramon, D. Y. (1999). Markov random field modelling of fMRI data using a mean field EM-algorithm. In E. R., Hancock, & M., Pelillo (Eds.), Energy Minimization Methods in Computer Vision and Pattern Recognition (pp. 317-330). Berlin: Springer. doi:10.1007/3-540-48432-9_22.

引用: https://hdl.handle.net/21.11116/0000-0003-2104-3

要旨

This paper considers the use of the EM-algorithm, combined with mean field theory, for parameter estimation in Markov random field models from unlabelled data. Special attention is given to the theoretical justification for this procedure, based on recent results from the machine learning literature. With these results established, an example is given of the application of this technique for analysis of single trial functional magnetic resonance (fMR) imaging data of the human brain. The resulting model segments fMR images into regions with different 'brain response' characteristics.