Inclusion Criteria:  Age 18-89 Mild Cognitive Impairment (MoCA score: 18-25) or Early AD (MoCA score: 17-24)  Exclusion Criteria:  Head trauma, traumatic brain injury, or concussion with loss of consciousness for >2 minutes Claustrophobia incompatible with MRI scanning Medical device incompatible with MRI scanning (e.g. cardiac pacemaker, implanted cardiac defibrillator, aneurysm brain clip, inner ear implant) Prior history as a metal worker and/or certain metallic objects in the body Exclusion Criteria will be carefully determined by the MRI screening form.