テラハラ　アツロウ   Terahara Atsuro   寺原　敦朗    所属   東邦大学  医学部 医学科（大森病院）    職種   教授
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Verification of in-treatment tumor position using kilovoltage cone-beam computed tomography: a preliminary study.
掲載誌名	正式名：International journal of radiation oncology, biology, physics 略　 称：Int J Radiat Oncol Biol Phys ISSNコード：03603016
巻・号・頁	69(4),pp.970-3
著者・共著者	Nakagawa K, Yamashita H, Shiraishi K, Igaki H, Terahara A†, Nakamura N, Ohtomo K, Saegusa S, Shiraki T, Oritate T, Yoda K
発行年月	2007/11
概要	Three-dimensional tumor position during rotational dose delivery was evaluated by acquiring in-treatment kilovoltage (kV) cone-beam CT (CBCT) to ensure treatment quality. The CBCT projection data of a phantom were acquired during rotational megavoltage (MV) dose delivery up to 6 Gy to evaluate image quality under MV beam irradiation. A lung tumor patient was treated with a total dose of 48 Gy in four fractions, each fraction including seven coplanar and noncoplanar beams, as well as a full-angle rotational beam. Tumor registration was performed between a planning CT image and a CBCT image immediately after patient setup. The patient couch was adjusted according to the registration results, and then the registration was repeated three times: immediately before treatment, during treatment, and immediately after treatment. The phantom image quality of the kV CBCT was not visually degraded up to the rotational MV dose of 6 Gy. Tumor position during rotational dose delivery was verified for the first time using kV CBCT.