1. Department of Radiological Technology Ehime University Hospital Ehime Japan
2. Graduate School of Advanced Technology and Science Tokushima University Tokushima Japan
3. Institute of Biomedical Sciences Tokushima University Graduate School Tokushima Japan
4. Okayama University Graduate School of Interdisciplinary Science and Engineering in Health Systems Okayama Japan
5. Department of Radiation Therapy National Hospital Organization Shikoku Cancer Center Matsuyama Japan
6. Department of Radiology Ehime University School of Medicine Ehime Japan
7. Graduate School of Technology, Industrial and Social Science Tokushima University Tokushima Japan