How many fmri scans are necessary and sufficient for resting brain connectivity analysis?

Document Type

Conference Proceeding

Publication Date

7-2-2018

Abstract

Functional connectivity analysis by detecting neuronal co-activation in the brain can be efficiently done using Resting State Functional Magnetic Resonance Imaging (rs-fMRI) analysis. Most of the existing research in this area employ correlation-based group averaging strategies of spatial smoothing and temporal normalization of fMRI scans, whose reliability of results heavily depends on the voxel resolution of fMRI scan as well as scanning duration. Scanning period from 5 to 11 minutes has been chosen by most of the studies while estimating the connectivity of brain networks. In this study, we have demonstrated that Dictionary Learning (DL) based rs-fMRI analysis, due to its inherent sparsity constraint-based matrix factorization property, can identify all the functional networks efficiently even with a limited number of scans. Preliminary results demonstrate that a scan of 1 minute is sufficient for DL to produce all the networks with better accuracy, computation, and reliability than existing methods.

Identifier

85058552144 (Scopus)

ISBN

[9781728112954]

Publication Title

2018 IEEE Global Conference on Signal and Information Processing Globalsip 2018 Proceedings

External Full Text Location

https://doi.org/10.1109/GlobalSIP.2018.8646415

First Page

494

Last Page

498

Grant

R03 DC013990

Fund Ref

National Institutes of Health

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