This combination of PET scans provided by UCLA on April 2, 2015 shows, from left, a normal brain scan, a suspected Chronic Traumatic Encephalopathy (CTE) subject, and a subject with Alzheimer's disease. In a report released on Monday, April 6, 2015, researchers say this brain-scanning technique might one day help doctors identify people with CTE, a disease linked to concussions in football and other sports, an illness now diagnosed after death. Symptoms include memory loss, confusion, aggression, depression and progressive dementia. These images are from the article "In vivo Characterization of Chronic Traumatic Encephalopathy (CTE) using [F-18]FDDNP-PET Brain Imaging," first author Jorge R. Barrio. (AP Photo/PNAS/David Geffen School of Medicine at UCLA)
NEW YORK (AP) — A brain-scanning technique might one day help identify people with a disease linked to concussions in football and other sports, an illness now diagnosed only after death, a small study suggests.