AdvertisementScientists Hunt For A Test To Diagnose Chronic Brain Injury In Living PeopleJuly 17, 2018Tom GoldmanfacebookEmailUCLA researchers are using a radioactive tracer, which binds to abnormal proteins in the brain, to see if it is possible to diagnose chronic traumatic encephalopathy in living patients. Warmer colors in these PET scans indicate higher concentrations of the tracer. (UCLA)