1 Department of Radiology, Iwate Medical University School of Medicine, 19-1 Uchimaru, Morioka, 020-8505, Japan. a.akahane@gmail.com.
2 Department of Radiology, Southern Tohoku Research Institute for Neuroscience, 7-115 Yatsuyamada, Koriyama, 963-8563, Japan.
3 Division of Dental Radiology, Department of Reconstructive Oral and Maxillofacial Surgery, Iwate Medical University School of Dentistry, 1-3-27 Chuo-dori, Morioka, 020-8505, Japan.
4 Department of Radiology, Iwate Medical University School of Medicine, 19-1 Uchimaru, Morioka, 020-8505, Japan.
5 Department of Molecular Diagnostic Pathology, Iwate Medical University, 19-1 Uchimaru, Morioka, 020-8505, Japan.
6 Department of Head and Neck Surgery, Iwate Medical University School of Medicine, 19-1 Uchimaru, Morioka, 020-8505, Japan.