1 Department of Radiology, Loyola University Medical Center, Stritch School of Medicine, Maywood, Illinois. Electronic address: Anthony.Kam@lumc.edu.
2 Department of Radiology, Loyola University Medical Center, Stritch School of Medicine, Maywood, Illinois.
3 Department of Radiology, Loyola University Medical Center, Stritch School of Medicine, Maywood, Illinois; Department of Neurological Surgery, Loyola University Medical Center, Stritch School of Medicine, Maywood, Illinois.