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2017 | OriginalPaper | Buchkapitel

Higher-Order Block Term Decomposition for Spatially Folded fMRI Data

verfasst von : Christos Chatzichristos, Eleftherios Kofidis, Yiannis Kopsinis, Manuel Morante Moreno, Sergios Theodoridis

Erschienen in: Latent Variable Analysis and Signal Separation

Verlag: Springer International Publishing

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Abstract

The growing use of neuroimaging technologies generates a massive amount of biomedical data that exhibit high dimensionality. Tensor-based analysis of brain imaging data has been proved quite effective in exploiting their multiway nature. The advantages of tensorial methods over matrix-based approaches have also been demonstrated in the context of functional magnetic resonance imaging (fMRI) data analysis. However, such methods can become ineffective in demanding scenarios, involving, e.g., strong noise and/or significant overlapping of activated regions. This paper aims at investigating the possible gains that can be obtained from a better exploitation of the spatial dimension, through a higher (than 3)-order tensor modeling of the fMRI signals. In this context, a higher-order Block Term Decomposition (BTD) is applied, for the first time in fMRI analysis. Its effectiveness in handling strong instances of noise is demonstrated via extensive simulation results.

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Metadaten
Titel
Higher-Order Block Term Decomposition for Spatially Folded fMRI Data
verfasst von
Christos Chatzichristos
Eleftherios Kofidis
Yiannis Kopsinis
Manuel Morante Moreno
Sergios Theodoridis
Copyright-Jahr
2017
DOI
https://doi.org/10.1007/978-3-319-53547-0_1