Dr. Cosgrove uses positron emission tomography (PET) to gain insights into the brains of people after they’ve stopped using alcohol and tobacco. Trained as a clinical psychologist who worked with individuals suffering from drug addiction, Dr. Cosgrove transitioned to conducting research in order to find more effective ways of helping patients recover from addiction and avoid relapse. Her laboratory develops and uses creative PET imaging paradigms to track changes in critical neurochemicals during the recovery from addiction.