1. *Department of Radiology, Tottori Prefectural Central Hospital, Tottori 680-0901, Japan
2. †Department of Otorhinolaryngology, Tottori Prefectural Central Hospital, Tottori 680-0901, Japan
3. ‡Department of Pathology, Tottori Prefectural Central Hospital, Tottori 680-0901, Japan
4. §Division of Radiology, Department of Pathophysiological and Therapeutic Science, School of Medicine, Tottori University Faculty of Medicine, Yonago 683-8503, Japan