1. Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, the Catholic University of Korea, Seoul, Republic of Korea

2. Department of Radiology, Eunpyeong St. Mary's Hospital, College of Medicine, the Catholic University of Korea, Seoul, Republic of Korea

3. Catholic Smart Imaging Center, Eunpyeong St. Mary's Hospital, College of Medicine, the Catholic University of Korea, Seoul, Republic of Korea