1. Department of Oral and Maxillofacial Radiology, Faculty of Dental Science, Kyushu University, Kyushu University, Fukuoka, Japan
2. Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Mahidol University, Mahidol University, Bangkok, Thailand
3. Department of Oral and Maxillofacial Radiology, Kyushu University Hospital, Kyushu University Hospital, Fukuoka, Japan
4. Department of Oral and Maxillofacial Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences,Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
5. Section of Image Diagnostics, Department of Diagnostics and General Care, Fukuoka Dental College,Fukuoka Dental College, Fukuoka, Japan