Margaret A. Brengle, M.D. Margaret A. Brengle, M.D., a board certified radiologist, graduated from medical school at the Indiana University School of Medicine. She completed a residency in diagnostic radiology and fellowship in vascular and interventional radiology at Indiana University Medical Center. Dr. Brengle's special interest is vascular and interventional radiology. She is a member of American Medical Association, American Roentgen Ray Society, Radiological Society of North America, American College of Radiology, Indianapolis Medical Society and Indiana State Medical Association.