Bow Wang1, Yi-Fang Tu1, Yi-Shan Tsai2. 1. From the Departments of Diagnostic Radiology (B.W., Y.-S.T.) and Pediatrics (Y.-F.T.), National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan. 2. From the Departments of Diagnostic Radiology (B.W., Y.-S.T.) and Pediatrics (Y.-F.T.), National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan. n506356@gmail.com.