{"created":"2023-05-15T14:36:55.404845+00:00","id":47578,"links":{},"metadata":{"_buckets":{"deposit":"cf069c82-6c0c-4dd9-80d4-600e4e127eac"},"_deposit":{"created_by":1,"id":"47578","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"47578"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00047578","sets":["1"]},"author_link":["773921","773920","773922","773919","773915","773916","773917","773918"],"item_8_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2009-04","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"7","bibliographicPageEnd":"2027","bibliographicPageStart":"2015","bibliographicVolumeNumber":"54","bibliographic_titles":[{"bibliographic_title":"Physics in Medicine and Biology"}]}]},"item_8_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The pencil-beam algorithm is valid only when elementary Gaussian beams are small enough compared to lateral heterogeneity of a medium, which is not always true in actual radiotherapy with protons and ions. This work addresses a solution for the problem. We found approximate self-similarity of Gaussian distributions, with which Gaussian beams can split into narrower and deflecting daughter beams when their sizes have overreached lateral heterogeneity in beam-transport calculation. The effectiveness was assessed in an carbon-ion beam experiment in the presence of steep range compensation, where the splitting calculation reproduced the detour effect amounting up to about 10% in dose or as large as the lateral particle disequilibrium effect. The efficiency was analyzed in calculations for carbon-ion and proton radiations with a heterogeneous phantom model, where the beam splitting increased computing times by factors of 4.7 and 3.2. The present method generally improves accuracy of the pencil-beam algorithm without severe inefficiency. It will therefore be useful for treatment planning and potentially other demanding applications.","subitem_description_type":"Abstract"}]},"item_8_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"IOP Publishing"}]},"item_8_relation_13":{"attribute_name":"PubMed番号","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"19287085","subitem_relation_type_select":"PMID"}}]},"item_8_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1088/0031-9155/54/7/010","subitem_relation_type_select":"DOI"}}]},"item_8_relation_17":{"attribute_name":"関連サイト","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://doi.org/10.1088/0031-9155/54/7/010","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_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Kanematsu, Nobuyuki"}],"nameIdentifiers":[{"nameIdentifier":"773915","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Komori, Masataka"}],"nameIdentifiers":[{"nameIdentifier":"773916","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yonai, Shunsuke"}],"nameIdentifiers":[{"nameIdentifier":"773917","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ishizaki, Azusa"}],"nameIdentifiers":[{"nameIdentifier":"773918","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kanematsu, Nobuyuki","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"773919","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Komori, Masataka","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"773920","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yonai, Shunsuke","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"773921","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ishizaki, Azusa","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"773922","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2019-08-06"}],"displaytype":"detail","filename":"c540e8b7a34d6454c8663fe983a861dc.pdf","filesize":[{"value":"808.2 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"text.pdf","url":"https://repo.qst.go.jp/record/47578/files/c540e8b7a34d6454c8663fe983a861dc.pdf"},"version_id":"e1cdedcc-53c8-400f-aba9-4c8c93e1540e"}]},"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":"Dynamic splitting of Gaussian pencil beams in heterogeneity-correction algorithms for radiotherapy with heavy charged particles","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Dynamic splitting of Gaussian pencil beams in heterogeneity-correction algorithms for radiotherapy with heavy charged particles"}]},"item_type_id":"8","owner":"1","path":["1"],"pubdate":{"attribute_name":"公開日","attribute_value":"2009-02-21"},"publish_date":"2009-02-21","publish_status":"0","recid":"47578","relation_version_is_last":true,"title":["Dynamic splitting of Gaussian pencil beams in heterogeneity-correction algorithms for radiotherapy with heavy charged particles"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-16T00:24:48.972834+00:00"}