1. Department of Oral and Maxillofacial Surgery, The University of Tokyo Hospital, Tokyo, Japan.
2. Human Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan.
3. Department of Radiological Sciences, Tokyo Metropolitan University, Tokyo, Japan.
4. Department of Radiological Science, Faculty of Health Science, Komazawa University, Tokyo, Japan.
5. Department of Radiology, The University of Tokyo Hospital, Tokyo, Japan.