1. Department of Radiology, Kindai University Faculty of Medicine , Osakasayama, Osaka, Japan
2. Department of Radiology, Division of Nuclear Medicine and PET Center, Hyogo College of Medicine , Nishinomiya, Hyogo, Japan
3. Department of Radiology, Nippon Medical School Musashi Kosugi Hospital , Kawasaki, Kanagawa, Japan
4. Department of Diagnostic Radiology, National Cancer Center Hospital , Tokyo, Japan
5. Department of Radiological Technology, Gunma Prefectural College of Health Science , Maebashi, Gunma, Japan
6. Department of Otorhinolaryngology, Kindai University Faculty of Medicine , Osakasayama, Osaka, Japan
7. Department of Oral and Maxillofacial Surgery, Kindai University Faculty of Medicine , Osakasayama, Osaka, Japan