By Satoru Kitano, MD, Nagaaki Marugami, MD, Toshiaki Taoka, MD, PhD, Kimihiko Kichikawa, MD, PhD
Department of Radiology, Nara Medical University, Nara, Japan
By Myrna C.B. Godoy, MD and David P. Naidich, MD
Department of Radiology, New York University Medical Center, New York, USA