John H.M. Austin, M.D., is Professor of Radiology Director of Thoracic Imaging. Dr. Austin is an internationally known chest radiologist and past president of the Fleischner Society, an international society dedicated to the study of chest diseases. Dr. Austin's research interests focus on the natural history and detection of lung cancer. Dr. Austin is heading the chest radiology division's research efforts in CT screening of at-risk subjects for lung cancer.

Walter Berdon, M.D., Director Emeritus of Pediatric Radiology is a goldmedal honoree of both the Society of Pediatric Radiology and the American Roentgen Ray Society. Dr. Berdon has published hundred of papers in Pediatric Radiology during his career and continues to enthusiastically practice pediatric radiology and the application of imaging to new clinical developments in pediatrics.

Peter D. Esser, Ph.D., is Professor of Clinical Radiology and Chief Physicist for the Kreitchman PET Center. He has focused on the development of clinical computer networks at Columbia-Presbyterian as well as applications in nuclear medicine and PET.

Frieda Feldman, M.D., is Professor of Radiology and Director of Musculoskeletal Radiology. Dr. Feldman is an internationally respected musculoskeletal radiologist whose current research interests are focused on applications of MRI to musculoskeletal disease. She is a past president of the New York Roentgen Society and the 1999 recipient of the New York Roentgen Society's lifetime achievement award. She received the Gold Medal of the International Skeletal Society in 2000.

Alexander G. Khandji, M.D., is Clinical Professor of Radiology, Vice-Chair for Clinical Affairs in the department, and Associate Director of the Radiology Service at Columbia-Presbyterian. He was Chief Resident during his residency here and later completed training in Neuroradiology at the Neurological Institute. His special interests include MRI, diagnostic neuroangiography and percutaneous diagnostic and interventional spinal procedures.

Jeffrey Newhouse, M.D., is Professor of Radiology, Director of the Division of Abdominal Imaging and Vice Chair, External Development. Dr. Newhouse is an internationally known GU radiologist and a past president of the Society of Uroradiology. He has written recent popular textbooks on Essentials of Uroradiology and Understanding of MRI. His research interests include applications of all types of imaging to the GU system and other applications of body MRI.

John Pile-Spellman, M.D., is Professor of Radiology, Vice Chair of Research and Director of Academic Interventional MRI. He is recognized as an international leader in Interventional Neuroradiology, and has developed a number of innovative new approaches to the endovascular treatment of a variety of cerebral vascular disorders. He publishes actively in collaboration with the neurology, neuropsychiatry and anesthesiology services at Columbia.

Anna Rozenshtein, M.D., is Associate Clinical Professor of Radiology, Associate Director of the Division of Thoracic Imaging, and Director of Radiology Residency Program. Her special interests include graduate medical education and imaging of pulmonary vascular diseases.

Carrie Ruzal-Shapiro, M.D., is Associate Professor of Clinical Radiology and Pediatrics, Director of the Division of Pediatric Radiology, and Vice Chair of Education in the Department of Radiology. She is a former Teacher of the Year in the Department of Radiology and in 2002 won the Teacher of the Year award from the graduating medical school class.

William S Millar, M.D., M.S., is Associate Professor of Clinical Radiology, and Head of Pediatric Neuroradiology. Dr. Millar was trained in Pediatric Neuroradiology at The Children's Hospital of Philadelphia prior to his arrival at Columbia. His clinical and research interests include MRI, MR spectroscopy and diffusion-weighted imaging of children with mitochondrial disorders, periventricular leukomalacia, leukoencephalopathies, brain tumors and hypoxic-ischemic brain injury. Prior to medical school, Dr. Millar was an engineer at ATT-Bell Laboratories.

Elise Desperito, M.D., is Associate Professor of Clinical Radiology and Director of Breast Imaging. Dr. Desperito leads a busy, clinically oriented mammography service that is pursuing a number of clinical projects in association with Columbia's outstanding breast surgery team. The mammography group, breast surgeons, and breast oncologists occupy the     Breast Cancer Center on the 10^th floor of Irving Pavilion.

Ronald B Staron,M.D., is an Associate Professor of Clinical Radiology and Director of Quality Assurance for the Dept of Radiology. His major clinical interests are musculoskeletal radiology and clinical-radiologic correlations in disorders of mineralization of bone.

Ronald L. Van Heertum, M.D., is Professor of Radiology, Interim Chairman - Administration, Director of the Division of Nuclear Medicine and Director of the Morton A. Kreitchman PET Center. Dr. Van Heertum is internationally known for his work with applications of SPECT and PET brain imaging. He currently has several national roles in the American College of Radiology including Chairman of the Nuclear Medicine & PET Accreditation Committee, Chairman of the Accreditation Chief's Committee and Vice Chairman (Accreditation) of the Commission on Quality & Safety: He is also a life-member and past Chairman of the American Board of Nuclear Medicine.