PET and MRI Feature Scan (IMAGE) Lund University Caption The illuminated spotes (red, yellow and green) indicate an accumulation of the protein beta-amyloid. The top row shows the brain of a patient diagnosed with Alzheimer's disease. Bottom row shows a brain from a healthy person. There are always some nonspecific binding of color markers, hence the bright spots in the healthy person. Credit Photo: Swedish Biofinder Study Usage Restrictions Photo: Swedish Biofinder Study 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.