Saw this on TV today, thought it was interesting and showed some hope for those afflicted with Alzheimer's Disease. Video can be watched in link.
https://www.pbs.org/newshour/show/can-ultrasound-be-used-to-fight-alzheimers
At age 61, Judi Polak is five years into a bleak diagnosis: Alzheimer’s disease. But last year she made medical history in a clinical trial, when a team of scientists, engineers and practitioners deployed a novel device to take aim at a big barrier in the fight against her illness. Science correspondent Miles O’Brien reports from Morgantown, West Virginia.
https://www.pbs.org/newshour/show/can-ultrasound-be-used-to-fight-alzheimers