Title

CSF Signal as a Complex-Valued RETROICOR Regressor Removes Unwanted Physiological Signal and Increases the Accuracy of Spatial Correlation in Complex-Valued fMRI

Document Type

Conference Proceeding

Language

eng

Publication Date

2016

Publisher

International Society for Magnetic Resonance in Medicine

Source Publication

Proceedings of the International Society for Magnetic Resonance in Medicine Scientific Meeting and Exhibition

Source ISSN

1545-4428

Abstract

Discarding the phase component of the time-series removes relevant biological information from a complex-valued signal. Although, commonly implemented retrospective image correction techniques fail to account for physiological artifacts in both the magnitude and phase components of the time-series. Using the CSF signal, observed during the data acquisition, as a complex-valued regressor increases the statistical power of fMRI analysis, through reducing unwanted physiological variability in the complex-valued signal of interest. The improved performance of implementing the complex-valued image correction methods is demonstrated with a comparison of magnitude-only and complex-valued spatial correlations.

Comments

Published as part of the proceedings of the International Society for Magnetic Resonance in Medicine 24th Annual Meeting, 2016. Permalink.