title: Dosimetric analysis between carbon ion radiotherapy and stereotactic body radiotherapy in stage I lung cancer.
abstract: OBJECTIVE
  To evaluate dosimetric differences between carbon ion radiotherapy (C-ion RT) and stereotactic body radiotherapy (SBRT) for stage I non-small cell lung cancer (NSCLC).
  
  
  METHODS
  Thirteen stage I NSCLC cases were planned with C-ion RT and SBRT. Prescription of the dose and fractionation (fr) for stage IA and IB in C-ion RT were 52.8 Gy (RBE)/4fr and 60.0 Gy (RBE)/4fr, respectively and those in SBRT were 52.8 Gy/4fr and 60.0 Gy/4fr, respectively.
  
  
  RESULTS
  The conformity index (CI) for planning target volume of C-ion RT was significantly lower than that of SBRT. The normal lung doses in C-ion RT were significantly lower those that in SBRT. In particularly, for a larger tumor, C-ion RT was lower CI and normal lung dose than SBRT.
  
  
  CONCLUSIONS
  C-ion RT has an advantage in both target conformity and sparing of normal lung in stage I NSCLC.
authors.affiliation: Department of Radiation Oncology, Gunma Prefectural Cancer Center, Gunma, Japan evashun1999@yahoo.co.jp.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Ebara
authors.affiliation: Gunma University Heavy Ion Medical Center, Gunma University, Gunma, Japan.
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Shimada
authors.affiliation: Gunma University Heavy Ion Medical Center, Gunma University, Gunma, Japan.
authors.forename: Hidemasa
authors.initials: H
authors.lastname: Kawamura
authors.affiliation: Department of Radiation Oncology, Gunma University, Graduate School of Medicine, Gunma, Japan.
authors.forename: Katsuyuki
authors.initials: K
authors.lastname: Shirai
authors.affiliation: Department of Radiation Oncology, Gunma University, Graduate School of Medicine, Gunma, Japan.
authors.forename: Jun-Ichi
authors.initials: J
authors.lastname: Saito
authors.affiliation: Gunma University Heavy Ion Medical Center, Gunma University, Gunma, Japan.
authors.forename: Motohiro
authors.initials: M
authors.lastname: Kawashima
authors.affiliation: Gunma University Heavy Ion Medical Center, Gunma University, Gunma, Japan.
authors.forename: Mutsumi
authors.initials: M
authors.lastname: Tashiro
authors.affiliation: Gunma University Heavy Ion Medical Center, Gunma University, Gunma, Japan.
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Ohno
authors.affiliation: Gunma University Heavy Ion Medical Center, Gunma University, Gunma, Japan.
authors.forename: Tatsuaki
authors.initials: T
authors.lastname: Kanai
authors.affiliation: Department of Radiation Oncology, Gunma University, Graduate School of Medicine, Gunma, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Nakano
mesh_terms: D002250:Carbon Radioisotopes; D003131:Combined Modality Therapy; D063193:Heavy Ion Radiotherapy; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology* / Q000628:therapy*; D009367:Neoplasm Staging; D011874:Radiometry; D016634:Radiosurgery; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted
chemical_list: D002250:Carbon Radioisotopes
keywords: Dosimetric analysis; carbon ion radiotherapy; stage I non-small cell lung cancer; stereotactic body radiotherapy