He holds a research MD degree (NUI) in experimental neuroimaging (work conducted at UCLA), and a Cambridge PhD in molecular imaging (work conducted at the Crump Institute for Molecular Imaging at UCLA, and the Molecular Imaging Program at Stanford, Gambhir laboratory). From 2000 to 2013 he was a University Lecturer and Honorary Consultant in Neuroradiology at the University of Cambridge School of Clinical Medicine and Addenbrooke’s Hospital in Cambridge, UK. He was formerly an Assistant and Associate Professor of Radiology at UCLA, and held visiting Associate Professorships at Columbia and MCW, Milwaukee. He has published extensively and won numerous awards at scientific meetings. His papers in experimental interventional neuroradiology and molecular imaging are widely cited. He has been a peer reviewer for dozens of international medical journals, as well as other medical charities and governmental funding agencies. He is Editor-in-Chief of the journal Reports in Medical Imaging, and an editorial board member for numerous biomedical journals. He is the senior author or editor of several books, including "Glioblastoma: State-of-the-Art Clinical Neuroimaging", and "Basilar Artery: A Clinical Review". In 2016 he was awarded a Special Faculty Permit ('eminent physician license') by the Medical Board of the State of California.