By Jeff S. Ross, MD; Head Radiology Research, Cleveland Clinic Foundation, Clevland, OH; Michael Brant-Zawadzki, MD, Medical Director, Department of Radiology, Hoag Memorial Hospital, Newport Beach, California; Mark Z. Chen, MD, Department of Radiology, Hoag Memorial Hospital, Newport Beach, California; and Kevin R. Moore, MD, Assistant Professor of Radiology, Section of Neuroradiology, Residency Director, University of Utah School of Medicine, Salt Lake City, Utah |