Alexander McKinney, MD, CI/CIIPDepartment of Radiology, Neuroradiology DivisionUniversity of Minnesota-Fairview Medical Center (M-Health)Minneapolis, MN, USA Zuzan Cayci, MDDepartment of Radiology, Neuroradiology DivisionUniversity of Minnesota-Fairview Medical Center (M-Health)Minneapolis, MN, USAMehmet Gencturk, MD Department of Radiology, Neuroradiology DivisionUniversity of Minnesota-Fairview Medical Center (M-Health)Minneapolis, MN, USA David R. Nascene, MDDepartment of Radiology, Neuroradiology DivisionUniversity of Minnesota-Fairview Medical Center (M-Health)Minneapolis, MN, USA Matthew Rischall, MDDepartment of Radiology, Neuroradiology DivisionUniversity of Minnesota-Fairview Medical Center (M-Health)Minneapolis, MN, USA Jeffrey B. Rykken, MDDepartment of Radiology, Neuroradiology DivisionUniversity of Minnesota-Fairview Medical Center (M-Health)Minneapolis, MN, USA Frederick W. Ott, MDDepartment of Radiology, Neuroradiology DivisionUniversity of Minnesota-Fairview Medical Center (M-Health)Minneapolis, MN, USA