Complex-Valued Correlation Increases Sensitivity and Specificity in the Analysis of Low Contrast-to-Noise fMRI Time-Series
Mary Kociuba1 and Daniel Rowe1,2
1Mathematics, Statistics, and Computer Science, Marquette University, Milwaukee, WI, United States, 2Biophysics, Medical College of Wisconsin, Milwaukee, WI, United States
The
standard in fMRI is a magnitude-only statistical analysis of the
data, despite evidence of task related change in the phase time-series. This study demonstrates the increased sensitivity and specificity of implementing complex-valued
correlation models for low magnitude and phase contrast-to-noise ratio (CNR)
values in fMRI data sets.
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