Perivascular and parenchymal brain fluid diffusivity in patients with a recent small subcortical infarct.

Purpose: Fluid exchanges between perivascular spaces (PVS) and interstitium may contribute to the pathophysiology of small vessel disease (SVD). We aimed to analyze water diffusivity measures and their relationship with PVS and other SVD imaging markers.

Methods: We enrolled 50 consecutive patients with a recent small subcortical infarct.