1. Department of Diagnostic Radiology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
2. Department of Medical Imaging and Radiology, Shu-Zen Junior College of Medicine and Management, Kaohsiung City 82144, Taiwan
3. Association of Radiological Technologists of Tainan City, Tainan 70403, Taiwan