Title :
Subspace Approaches for fMRI Time Series Estimation
Author :
Niskanen, E.I. ; Tarvainen, M.P. ; Kononen, M. ; Soininen, H. ; Karjalainen, P.A.
Author_Institution :
Univ. of Kuopio, Kuopio
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.
Keywords :
biomedical MRI; brain; medical signal processing; neurophysiology; time series; BOLD response functional connectivity; BOLD response single trial estimation; blood oxygenation level dependent responses; data correlation matrix eigenvectors; fMRI time series estimation; functional magnetic resonance imaging; signal subspace; Blood flow; Brain modeling; Hospitals; Image analysis; Magnetic analysis; Magnetic resonance imaging; Nervous system; Neurophysiology; Physics; Time series analysis; Algorithms; Brain; Brain Mapping; Cerebrovascular Circulation; Humans; Image Enhancement; Image Interpretation, Computer-Assisted; Magnetic Resonance Imaging; Models, Biological; Models, Statistical; Reproducibility of Results; Sensitivity and Specificity;
Conference_Titel :
Engineering in Medicine and Biology Society, 2007. EMBS 2007. 29th Annual International Conference of the IEEE
Conference_Location :
Lyon
Print_ISBN :
978-1-4244-0787-3
DOI :
10.1109/IEMBS.2007.4353587
