Tracking the Onset of Alzheimer's (VIDEO) University of California - Berkeley This video is under embargo. Please login to access this 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. License Licensed content 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.