Dr. John Ruff

John Mackrell is a Radiologist in Leonardtown, Maryland. Dr. Mackrell is rated as an Advanced provider by MediFind in the treatment of Diaphragmatic Hernia. His top areas of expertise are Emphysema, Lymphofollicular Hyperplasia, Gallbladder Disease, and Diverticular Disease.

Christopher Grady is a Radiologist in Fairfax, Virginia. Dr. Grady is rated as a Distinguished provider by MediFind in the treatment of Diaphragmatic Hernia. His top areas of expertise are Bronchogenic Cyst, Visceromegaly, Non-Alcoholic Fatty Liver Disease, and Pleurisy.

Dr. Richard Southard’s specialty is in pediatric radiology, with more than 25 years of experience in private practice and hospital settings. He joins Johns Hopkins from Phoenix Children’s Hospital, where he is vice chief of Radiology Operations. Previously, he served as a pediatric radiologist, partner and president of Radiology Consultants North Dallas, a Texas-based private practice group. He earned his medical degree from The Ohio State University before going on to an internship and residency in pediatric medicine at Nationwide Children’s Hospital, followed by a diagnostic radiology residency at The University of Pittsburgh Medical Center and fellowship in pediatric radiology at Pittsburgh Children’s Hospital. Dr. Southard’s research has focused on CT radiation dose reduction, imaging of congenital heart disease, implementation and validation of iterative reconstruction noise reduction techniques and dual-energy spectral CT applications in children. He joined the pediatric radiology faculty in February 2023 and will be working remotely from Arizona. Dr. Southard is rated as an Advanced provider by MediFind in the treatment of Diaphragmatic Hernia. His top areas of expertise are Tracheobronchopathia Osteoplastica, Bronchogenic Cyst, Dextrocardia, and Collins Pope Syndrome.