John O’Neill, MD, is the musculoskeletal fellowship director and an assistant professor at St. Joseph’s Healthcare/McMaster University in Ontario. Dr. O’Neill earned his medical degree at University Cork College and a degree in clinical imaging at the University of Edinburgh. He completed musculoskeletal fellowships at McMaster University and the University of Michigan, Ann Arbor. Dr. O’Neill has served on national guideline committees for the Canadian Association of Radiologists and has presented at the American Roentgen Ray Society. His papers have appeared in journals such as Clinical Radiology and CardioVascular & Interventional Radiology.