1. Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, Okayama 700‑8558, Japan
2. Department of Oral and Maxillofacial Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700‑8558, Japan
3. Graduate School of Interdisciplinary Sciences and Engineering in Health Systems, Okayama University, Okayama 770‑8558, Japan
4. Department of Dentistry and Dental Surgery, College of Medicine and Health Sciences, An‑Najah National University, Nablus 44839, Palestine,
5. Department of Oral Radiology, Faculty of Dentistry, Hasanuddin University, Sulawesi 90245, Indonesia
6. Department of Radiology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700‑8558, Japan
7. Department of Proton Beam Therapy, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700‑8558, Japan