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57th Annual Conference of the Particle Therapy Co-operative Group (PTCOG57)

https://repo.qst.go.jp/records/66818
https://repo.qst.go.jp/records/66818
62ae3c43-b45f-4022-a6f8-ff2cc22a3044
Item type 会議発表用資料 / Presentation(1)
公開日 2018-06-01
タイトル
タイトル 57th Annual Conference of the Particle Therapy Co-operative Group (PTCOG57)
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_c94f
資源タイプ conference object
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 Mizuno, Hideyuki

× Mizuno, Hideyuki

WEKO 657002

Mizuno, Hideyuki

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水野 秀之

× 水野 秀之

WEKO 657003

en 水野 秀之

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抄録
内容記述タイプ Abstract
内容記述 For multicenter clinical studies of carbon-ion radiation therapy (C-ion RT), dose uniformity among centers is crucial. In the clinical studies of The Japan carbon-ion radiation oncology study group (J-CROS), dosimetric inter-comparison for all centers participating in clinical studies was performed using the end-to-end test method. All five centers that had performed C-ion RT in Japan, in 2017, participated. A dedicated water phantom was produced for the test. CT imaging and treatment plan was performed using the same method as the patient, the physical dose of the isocenter was measured by the ionization chamber dosimeter, and compared with the calculated dose from the treatment planning system. As a result, the difference between the measured and calculated doses in all five facilities were within ± 3%, tolerance level. Uniformity of dose among institutions is guaranteed. In addition, in response to the inter-comparison dosimetry, some centers have begun actions to improve the dosimetry precision. For instance, thermometers and barometers used for absolute dosimetry in one center, that had not been calibrated as those were mounted in the irradiation system, were finally calibrated. In other center, old type ionization chamber was used as the reference dosimeter, but it was updated to a new type. The team of medical physicists of J-CROS continue for these kinds of QA activity among C-ion RT centers.
会議概要(会議名, 開催地, 会期, 主催者等)
内容記述タイプ Other
内容記述 PTCOG57
発表年月日
日付 2018-05-24
日付タイプ Issued
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