@misc{oai:repo.qst.go.jp:00071385, author = {Inaniwa, Taku and Suzuki, Masao and Furukawa, Takuji and Mori, Shinichiro and Kanematsu, Nobuyuki and Shirai, Toshiyuki and et.al and 稲庭 拓 and 鈴木 雅雄 and 古川 卓司 and 森 慎一郎 and 兼松 伸幸 and 白井 敏之}, month = {Nov}, note = {Treatment plans of c-ion radiotherapy have been made on the assumption that the beams in one fraction are delivered instantaneously by neglecting the dose delivery time as well as the interruption time. However, in practical treatments, it takes 1-10 minutes or longer to deliver a fractional dose to a patient depending on the prescribed dose level, the dose delivery technique and the performance of the delivery system. Especially, the advanced therapeutic techniques such as a hypo-fractionation and a respiratory gating usually require more time to deliver a fractional dose than the convetional one. In addition, the dose delivery can be interrupted due to some reasons such as the necessity of a patient re-setup between fields in a treatment fraction and machine troubles. Cell killing tends to decrease with the fraction time because of sublethal damage repair (SLDR). Thus, it is important to investigate the quantity of SLDR during the fraction time and to evaluate the effects of dose-delivery time structure on the biological effectiveness of therapeutic c-ion beams. In this study, the Microdosimetric Kinetic Model (MKM) was adopted to address this issue., 4D Treatment planning workshop 2013}, title = {The Effect of dose-delivery time structure on biological effectiveness for charged particle therapy}, year = {2013} }