Distributionally Accurate FMRI Phase Activation

Authors

Daniel B. Rowe, Marquette UniversityFollow
John C. Bodenschatz, Marquette University

Document Type

Conference Proceeding

Publication Date

2025

Publisher

American Statistical Association

Source Publication

2025 JSM Proceedings

Original Item ID

DOI: 10.5281/zenodo.16921786

Abstract

In fMRI, it is important to observe the functioning brain as fast as possible and at as high of a spatial resolution as possible. Increased spatial and temporal speed results in voxels with increased noise relative to signal and contrast. There is much evidence to suggest that there is important biological information contained within the phase component of the fMRI signal. When the signal- to-noise ratio within a voxel is low, as when there is ultra-high resolution, the marginal statistical distribution of the phase is non-standard and difficult to work with. This non-standard marginal phase distribution at high signal-to-noise ratios is normally distributed, but at low signal-to-noise ratios needs to be utilized for accurate modeling.

Comments

Published as part of the 2025 JSM Proceedings (2025). DOI.

Recommended Citation

Rowe, Daniel B. and Bodenschatz, John C., "Distributionally Accurate FMRI Phase Activation" (2025). Mathematical and Statistical Science Faculty Research and Publications. 154.
https://epublications.marquette.edu/math_fac/154