1. From the University of Virginia (A.H., M.W.), Department of Radiology, Neuroradiology Division, Charlottesville, VA; Department of Radiology, (A.H., M.F.W., J.H., M.W.), Neuroradiology Section, Department of Neurosurgery (N.D.), Department of Anesthesia and Perioperative Care (H.S., W.L.Y.), Department of Anatomy (P.T.O.), University of California San Francisco, San Francisco, CA; Philips Healthcare (J.B.), CT and Nuclear Medicine, Imaging Physics and System Analysis, San Jose, CA; Technische...