Sandra J. Allison, MD, is a Board-Certified Diagnostic Radiologist and the Director of Ultrasound for Washington Radiology, practicing in the Washington, DC, and Northern Virginia area. Dr. Allison specializes in Ultrasound with areas of expertise in musculoskeletal, gynecologic, and vascular imaging. She currently holds an Associate Professor of Radiology appointment at Georgetown University School of Medicine where she previously served as Radiology Residency Program Director and Chief of Ultrasound. Dr. Allison is a national and international invited lecturer and is active in many professional organizations. She is a fellow of the American College of Radiology, the American Institute of Ultrasound in Medicine, and the Society of Radiologists in Ultrasound. Dr. Allison completed her diagnostic radiology residency and fellowship in Ultrasound, CT, and MRI at Thomas Jefferson University Hospital in Philadelphia, PA.