Keywords: White Matter, Brain, crossing fibers, biomarker, NuFO, FADiffusion MRI-based biomarkers are commonly used to assess brain microstructural properties. Mathematical models have been developed to calculate various metrics; each are sensitive to different tissue features. Here, we investigate whether there are differences in the number of fiber orientations (NuFO) between male and female brains and how these results compare to corresponding DTI-derived fractional anisotropy (FA) findings. Results show NuFO-based differences with high effect size (>1 Cohen’s D) in hippocampi, which are undetected in FA-tests. Therefore, NuFO could provide complementary aspects to DTI metrics to capture differences in microstructural organization.
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