@misc{oai:repo.qst.go.jp:00072560,
 author = {Mizuno, Hideyuki and Minohara, Shinichi and Kanematsu, Nobuyuki and Fukumura, Akifumi and Yonai, Shunsuke and Tashiro, Mutsumi and Yusa, Ken and Yanou, Toshihiro and Suga, Masaki and Mizota, Manabu and 水野 秀之 and 蓑原 伸一 and 兼松 伸幸 and 福村 明史 and 米内 俊祐 and 田代 睦 and 遊佐 顕 and 矢能 稔啓 and 壽賀 正城 and 溝田 学},
 month = {May},
 note = {The QA team of Japan Carbon-ion Radiation Oncology Study Group (J-CROS), composed of the medical physicists of carbon-ion radiotherapy centers, has conducted several QA activities such as dose inter-comparison and on-site dose audit (end-to-end test) to assure and improve the quality of multi-center clinical trial of carbon-ion radiotherapy in Japan. Through these interactional activities among medical physicists of each center, it was recognized that there were some variations in practical procedures for treatment planning and beam delivery processes. We decided to make survey for the procedures of respiratory gating and metal artifact management in treatment planning process as those were considered to have big effect on the carbon-ion radiotherapy. For the respiratory gating procedure, 17 items were surveyed such as internal/external gating, type of sensor, delayed time commissioning, methodology of CT acquisition, how to decide the gate level, how to manage with respiratory level drift during treatment, QA and so on. For the metal artifact management for treatment planning process, 12 items were surveyed such as calculation methods for the beam penetrating metal including replacement of stopping power ratio value and evaluation of its volume, how to manage streak artifacts or contrast materials and so on. The results were shared with the QA team of J-CROS to standardize and improve the methodology of each center., 56th Annual Conference of the Particle Therapy Co-Operative Group (PTCOG56)},
 title = {Survey of practical procedure of respiratory gating and metal artifact management in treatment planning for carbon-ion radiotherapy in Japan},
 year = {2017}
}