He is a behavioral neurologist and cognitive neuroscientist and uses neuroimaging to study brain anatomy, function, and molecular composition in aging and neurodegenerative diseases. Dickerson is also the director of the frontotemporal disorders unit, the director of clinical applications in the morphometry service, a co-director of the gerontology research unit's neuroimaging group, and a co-investigator in the imaging core of the Alzheimer's Disease Research Center, all at Massachusetts General Hospital.