doi:10.1118/1.3130021

　【重要】サーバ移転のお知らせ
　　いつも当サイトをご利用いただき誠にありがとうございます。当サイトは2019/03/11にJAIROCloudへサーバ移転致しました。
　サーバ移転の関係上、2019/03/10以前にブックマークされたURL（URI）にアクセスしますと、「アイテムが削除されています」のアラートBOXが表示されます。
　ご利用の皆様には大変お手数をおかけしますが、当サイトより改めて必要なページを検索し再度ブックマークして頂きますようお願い申し上げます。

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　量子科学技術研究開発機構　学術機関リポジトリ担当

　　Thank you very much for using our website. On the 11th of March 2019, this site was moved from our own network server to the JAIRO Cloud network server.
　　If you previously bookmarked this site, that bookmark will no longer work.
　　We would be grateful if you could bookmark the website again. Thank you very much for your understanding and cooperation.

　　　　>>about

量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。
Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum and Radiological Science and Technology.
　　　　close<<

お知らせ

2019.03.11 JAIROCloudへサーバ移転し、サイトをリニューアルしました。

WEKO


	トップ


	ランキング

Language

インデックスツリー

インデックス

原著論文

Permalink : http://id.nii.ac.jp/1657/00045594/

Development of an irradiation method with lateral modulation of SOBP width using a cone-type filter for carbon ion beams 利用統計を見る

アイテムタイプ	学術雑誌論文 / Journal Article
言語	英語
著者	Ishizaki Azusa Kanematsu Nobuyuki Kanai Tatsuaki Yonai Shunsuke Takei Yuka Kase Yuuki Komori Masataka et.al
抄録	Passive irradiation methods deliver an extra dose to normal tissues upstream of the target tumor, while in dynamic irradiation methods, interplay effects between dynamic beam delivery and target motion induced by breathing or respiration distort the dose distributions. To solve the problems of those two irradiation methods, the authors have developed a new method that laterally modulates the spread-out Bragg peak (SOBP) width. By reducing scanning in the depth direction, they expect to reduce the interplay effects. They have examined this new irradiation method experimentally. In this system, they used a cone-type filter that consisted of 400 cones in a grid of 20 cones by 20 cones. There were five kinds of cones with different SOBP widths arranged on the frame two dimensionally to realize lateral SOBP modulation. To reduce the number of steps of cones, they used a wheel-type filter to make minipeaks. The scanning intensity was modulated for each SOBP width with a pair of scanning magnets. In this experiment, a stepwise dose distribution and spherical dose distribution of 60 mm in diameter were formed. The nonflatness of the stepwise dose distribution was 5.7% and that of the spherical dose distribution was 3.8%. A 2 mm misalignment of the cone-type filter resulted in a nonflatness of more than 5%. Lateral SOBP modulation with a cone-type filter and a scanned carbon ion beam successfully formed conformal dose distribution with nonflatness of 3.8% for the spherical case. The cone-type filter had to be set to within 1 mm accuracy to maintain nonflatness within 5%. This method will be useful to treat targets moving during breathing and targets in proximity to important organs.
雑誌名	Medical Physics
巻	36
号	6
ページ	2222 - 2227
発行年	2009-05
ISSN	0094-2405
DOI	10.1118/1.3130021
著者版フラグ	none

訪問者数

更新情報 Recent info

リンク　Link

検索