 The study found that there was no significant correlation between white matter hyper-intensities, fractional anisotropy, and amyloid and tau-positron emission tomography, PET, biomarkers. However, it did find that amyloid and tau-pet biomarkers were strongly correlated, suggesting a shared mechanism behind their development. This article was authored by Petrice M. Cogswell, Emily S. Lunt, Terry M. Ferno, and others.