1. Division of Radiation Safety and Quality Assurance National Cancer Center Hospital Chuo‐ku Tokyo Japan
2. Department of Radiological Sciences Graduate School of Human Health Sciences Tokyo Metropolitan University Arakawa‐ku Tokyo Japan
3. Division of Boron Neutron Capture Therapy National Cancer Center Exploratory Oncology Research & Clinical Trial Center Chuo‐ku Tokyo Japan
4. Medical Physics Laboratory Division of Health Science Graduate School of Medicine Osaka University Suita city Osaka Japan
5. Department of Radiological Technology National Cancer Center Hospital Chuo‐ku Tokyo Japan
6. Department of Nursing National Cancer Center Hospital Chuo‐ku Tokyo Japan
7. Department of Radiological Technology National Cancer Center Hospital East Kashiwa‐shi Chiba Japan
8. Department of Radiation Oncology National Cancer Center Hospital Chuo‐ku Tokyo Japan