Amyloid-related imaging abnormalities
Amyloid-related imaging abnormalities (ARIA) are abnormal differences seen in magnetic resonance imaging of the brain in patients with Alzheimer's disease. ARIA is associated with anti-amyloid drugs, particularly human monoclonal antibodies such as aducanumab.
Source: Wikipedia — Amyloid-related imaging abnormalities (CC BY-SA 4.0)