Gene-Jack is a board certified Nuclear Medicine physician. He joined NIAAA as a senior clinician and the clinical director of LNI in 2013. Prior to his current appointment, he was a professor of Radiology at Stony Brook University, a senior scientist and chairman of the medical department at Brookhaven National Laboratory. He also held a joint appointment as a professor of Psychiatry at Mount Sinai School of Medicine. His research focuses on the application of PET and functional MRI to the study of various brain disorders. He is interested in using PET to study the neuro-psychiatric mechanisms and manifestations of alcoholism, drug addiction, ADHD, obesity and eating disorder in humans. Using PET, he first reported similarity of human brain circuits’ disruption in drug addiction and in obesity. Prior to his appointment in NIH, he had obtained grant awards from Department of Energy, NIH and pharmaceutical company to support his research. As results of his imaging research, he has published 281 original articles, 45 review articles, 18 book chapters.