MRI-derived measurements of perivascular space (PVS) volume, glymphatic clearance function (DTI-ALPS index), and cerebrospinal fluid dynamics in AD cohorts. Includes data from the ADNI PVS substudy, the Rochester sleep study (Xie et al. 2013 Science), and the UK Biobank brain MRI glymphatic markers. Referenced in perivascular spaces and glymphatic clearance failure analyses.