Alexander G. Khandji, MD

Dr. Ernst Garçon is board certified in diagnostic radiology with subspecialty training in neuroradiology. He is an associate professor of radiology at Columbia University Irving Medical Center and an attending radiologist at NewYork-Presbyterian Hospital. In addition to his clinical responsibilities, he is the associate chair of community outreach for the Department of Radiology. He also teaches and supervises radiology residents and medical students. Dr. Garçon has extensive experience in all aspects of neuroimaging and a clinical focus on non-vascular neurointerventional procedures and neurodegenerative imaging. He is a member of the Radiological Society of North America, American College of Radiology, American Society of Neuroradiology, and the American Society of Spine Radiology. Dr. Garçon's extensive global health work has led to significant improvements for diagnostic imaging in Haiti. In partnership with several global health foundations and organizations, he helped to develop Haiti's first radiology residency program and helped launch the first radiologic technologist program in the country. He has also organized and provided on-site radiology education for physicians and residents at the State University of Haiti Hospital in Port au Prince and has hosted several externships for Haitian residents at Columbia. Dr. Garçon is a co-chair of the Department of Radiology's Diversity Committee, promoting the recruitment and development of minority faculty. His work is focused on inspiring young students with disenfranchised backgrounds who are interested in medicine and wish to pursue a career in radiology.

Dr. Pamela Nguyen is board certified in diagnostic radiology with special expertise in neuroradiology and pediatric neuroradiology. She is an assistant professor of radiology at Columbia University Irving Medical Center and an assistant attending radiology at NewYork-Presbyterian Hospital. She earned her medical degree at the University of North Texas College of Medicine and completed an internship at Baylor College of Medicine, a residency at the University of Illinois Chicago Hospital and a diagnostic neuroradiology fellowship at Northwestern Memorial Hospital. She is the Neuroradiology Fellowship director and her clinical responsibilities also include teaching and supervising radiology residents and medical students. Dr. Nguyen is a member of the Radiological Society of North America, American College of Radiology, American Society of Neuroradiology and American Roentgen Ray Society.

Dr. Angela Lignelli is an associate professor of radiology at Columbia University Irving Medical Center (CUIMC) and associate chair of patient access and experience for the Department of Radiology. She is board certified in diagnostic radiology and subspecialty certified in neuroradiology. Dr. Lignelli’s clinical focus includes brain tumor imaging in both adults and children. She specializes in advanced imaging techniques including MR perfusion, MR spectroscopy and functional MRI. Her primary research interests involve correlating anatomic and non-anatomic brain imaging of brain tumors with neuoropathologic markers and clinical outcomes. Her secondary research interest involves pediatric neuroimaging in metabolic disorders. Dr. Lignelli has spent the duration of her career in radiology at CUIMC/NewYork-Presbyterian (NYP), where she completed her radiology residency and neuroradiology fellowship before becoming a member of the faculty. She is a member of the Vagelos College of Physician and Surgeon's Academy of Clinical Excellence (ACE). In addition to her clinical and research expertise, Dr. Lignelli is a committed educator, both to medical students and residents of the NYP/CUIMC community. She served as program director for the Diagnostic Radiology Residency for several years.