Affiliation: | (1) Department of Radiology, Ansan Hospital, Korea University College of Medicine, Gojan Dong 516, Ansan City, Kyonggido, 425-707, South Korea;(2) Department of Thoracic and Cardiovascular Surgery, Ansan Hospital, Korea University College of Medicine, Ansan, South Korea;(3) Department of Radiology, KonKuk University Hospital, Seoul, South Korea |