Tracking the Onset of Alzheimer's (video) University of California - Berkeley Share Print E-Mail Loading video... Caption Dr. William Jagust shows how PET scans can help track the progression of Alzheimer's disease. Credit Video produced by Roxanne Makasdjian and Stephen McNally Usage Restrictions All rights reserved. Editorial use only with credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.