Low-Intensity Focused Ultrasound (LIFU) Neuromodulation

Inclusion Criteria: * Males and non-pregnant females, aged 45-85 years * Able and willing to give informed consent * Must meet the clinical criteria for MCI due to Alzheimer's disease * If receiving concurrent treatment with an AChEI and/or memantine, has been on a stable dose for at least 45 days * Able to communicate sensations during the LIFU procedure Exclusion Criteria: * Unable to undergo MR-imaging because of implanted pacemakers, medication pumps, aneurysm clips, metallic prostheses (including metal pins and rods, heart valves or cochlear implants), shrapnel fragments, permanent make-up or small metal fragments in the eye that welders and other metal workers may have, or if candidates are uncomfortable in small spaces (have claustrophobia). * Participants with more than 30% of the skull area traversed by the sonication pathway are covered by scars, scalp disorders (e.g., eczema), atrophy of the scalp, or implanted objects in the skull or the brain. * Participants with a history of seizure disorder. * Participants with clinically significant chronic pulmonary disorders e.g., severe emphysema, pulmonary vasculitis, or other causes of reduced pulmonary vascular cross-sectional area. * Participant does not speak English * Participant is pregnant or planning to be pregnant