{"created":"2023-05-15T14:36:07.352716+00:00","id":46496,"links":{},"metadata":{"_buckets":{"deposit":"81dd00d7-150a-4682-91c6-f31ae5657528"},"_deposit":{"created_by":1,"id":"46496","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"46496"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00046496","sets":["1"]},"author_link":["463328","463323","463324","463326","463315","463318","463322","463317","463320","463321","463329","463316","463314","463330","463327","463325","463319"],"item_8_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2012-05","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"6","bibliographicPageEnd":"1731","bibliographicPageStart":"1717","bibliographicVolumeNumber":"57","bibliographic_titles":[{"bibliographic_title":"Physics in Medicine and Biology"}]}]},"item_8_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"We have developed a novel designmethod of ridge filters for carbon-ion therapy\nusing a broad-beam delivery system to improve the flatness of a biologically\neffective dose in the spread-out Bragg peak (SOBP). So far, the flatness of the\nSOBP is limited to about +-5% for carbon beams since the weight control\nof component Bragg curves composing the SOBP is difficult. This difficulty\narises from using a large number of ridge-bar steps (e.g. about 100 for a SOBP\nwidth of 60 mm) required to form the SOBP for the pristine Bragg curve with an\nextremely sharp distal falloff. Instead of using a single ridge filter, we introduce\na ripple filter to broaden the Bragg peak so that the number of ridge-bar steps\ncan be reduced to about 30 for SOBP with of 60mmfor the ridge filter designed\nfor the broadened Bragg peak. Thus we can manufacture the ridge filter more\naccurately and then attain a better flatness of the SOBP due to well-controlled\nweights of the component Bragg curves.We placed the ripple filter on the same\nframe of the ridge filter and arranged the direction of the ripple-filter-bar array\nperpendicular to that of the ridge-filter-bar array. We applied this method to a\n290 MeV u-1 carbon-ion beam in Heavy Ion Medical Accelerator in Chiba and\nverified the effectiveness by measurements.","subitem_description_type":"Abstract"}]},"item_8_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1088/0031-9155/57/6/1717","subitem_relation_type_select":"DOI"}}]},"item_8_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0031-9155","subitem_source_identifier_type":"ISSN"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"metadata only access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_14cb"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Hara, Yousuke"}],"nameIdentifiers":[{"nameIdentifier":"463314","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Takada, Yoshihisa"}],"nameIdentifiers":[{"nameIdentifier":"463315","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hotta, Kenji"}],"nameIdentifiers":[{"nameIdentifier":"463316","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tansho, Ryohei"}],"nameIdentifiers":[{"nameIdentifier":"463317","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Nihei, Tetsuya"}],"nameIdentifiers":[{"nameIdentifier":"463318","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Suzuki, Yojiro"}],"nameIdentifiers":[{"nameIdentifier":"463319","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Himukai, Takeshi"}],"nameIdentifiers":[{"nameIdentifier":"463320","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Matsufuji, Naruhiro"}],"nameIdentifiers":[{"nameIdentifier":"463321","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"et.al"}],"nameIdentifiers":[{"nameIdentifier":"463322","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"原 洋介","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"463323","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"高田 義久","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"463324","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"堀田 健二","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"463325","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"丹正 亮平","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"463326","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"二瓶 哲哉","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"463327","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"鈴木 庸次郎","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"463328","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"日向 猛","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"463329","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"松藤 成弘","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"463330","nameIdentifierScheme":"WEKO"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Improvement of spread-out Bragg peak flatness for a carbon-ion beam by the use of a ridge filter with a ripple filter","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Improvement of spread-out Bragg peak flatness for a carbon-ion beam by the use of a ridge filter with a ripple filter"}]},"item_type_id":"8","owner":"1","path":["1"],"pubdate":{"attribute_name":"公開日","attribute_value":"2013-02-18"},"publish_date":"2013-02-18","publish_status":"0","recid":"46496","relation_version_is_last":true,"title":["Improvement of spread-out Bragg peak flatness for a carbon-ion beam by the use of a ridge filter with a ripple filter"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T23:51:05.044539+00:00"}