Subspace approaches for FMRI time series estimation

Eini I Niskanen; Mika P Tarvainen; Mervi Kononen; Hilkka Soininen; Pasi A Karjalainen

doi:10.1109/IEMBS.2007.4353587

Subspace approaches for FMRI time series estimation

Annu Int Conf IEEE Eng Med Biol Soc. 2007:2007:5485-8. doi: 10.1109/IEMBS.2007.4353587.

Authors

Eini I Niskanen¹, Mika P Tarvainen, Mervi Kononen, Hilkka Soininen, Pasi A Karjalainen

Affiliation

¹ Department of Physics, University of Kuopio, Kuopio, Finland.

PMID: 18003253
DOI: 10.1109/IEMBS.2007.4353587

Abstract

In this paper, we present a subspace approach for functional magnetic resonance imaging (fMRI) time series analysis. The signal subspace is formed of the eigenvectors of data correlation matrix. The approach is utilized both for single-trial estimation of blood oxygenation level dependent (BOLD) responses in fMRI time series and for studying the functional connectivity of BOLD responses from different spatial areas.

MeSH terms

Algorithms*
Brain / blood supply
Brain / physiology*
Brain Mapping / methods*
Cerebrovascular Circulation / physiology
Humans
Image Enhancement / methods
Image Interpretation, Computer-Assisted / methods*
Magnetic Resonance Imaging / methods*
Models, Biological
Models, Statistical
Reproducibility of Results
Sensitivity and Specificity