{"created":"2023-05-15T14:49:26.735403+00:00","id":67707,"links":{},"metadata":{"_buckets":{"deposit":"3e26134d-cfef-406f-b37c-82accdf00d2c"},"_deposit":{"created_by":1,"id":"67707","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"67707"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00067707","sets":["10:28"]},"author_link":["665423","665422"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2003-10-05","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"(1) Introduction\n   Carbon ion therapy at NIRS has been conducted using static broad beams delivered from fixed beam lines, horizontal and vertical. We use lateral beam limiting devices of apertures or MLCs, and use ridge filters and range compensators to conform dose to the PTV depth extent. The biologically equivalent dose has been converted from the physical dose based on a model created combining the cell survival experiments with the clinical RBE of the fast neutron therapy at NIRS (1). The treatment planning system, HIPlan, was developed incorporating the LBL code with a commercial medical image viewer running on SGI UNIX workstations (2). The system has been improved continuously, but yet it is behind recent advanced radiotherapy treatment planning (RTP) systems in various functions. Therefore we plan to move to the system based on a commercial radiotherapy treatment planning (RTP). The system is described.  \n(2) Methods\n    We adopted a commercial RTP, Xio (formerly FOCUS, CMS Inc., MO, USA) that supports the proton therapy at NPTC-MGH. With the support of the manufacturer, minimum required functions have been added. The support of MLC and ion beam model such as distal tail and ion scattering parameters are examples. Interfaces to irradiation system, database and other TP systems have been developed as external tools.      \n(3) Results\nDose calculation: Compared to HIPlan, more realistic dose distribution can be calculated. Main factors are (1) in beam model, geometrical divergence and penumbra are included compared to previous parallel beam model, (2) real range compensator data are used. Calculations are compared to measured dose distributions along with parallel beam calculations.\nUtilities: Various software utilities can be used in planning such as image fusion and GUI tools in defining PTV and ports. Comparisons to proton and X-ray plans are also feasible.           \n(4) Conclusion\n         It is demonstrated that the carbon ion treatment planning at NIRS is feasible using a commercial RTP with enhanced capabilities.\n\\nReferences\n1. Kanai T et al. Int J Radiat Oncol Bio Phys 1999; 44:201.\n2. Endo M et al. J Jpn Soc Ther Radiol Oncol 1995; 8:231.","subitem_description_type":"Abstract"}]},"item_10005_description_6":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）","attribute_value_mlt":[{"subitem_description":"9th workshop on Heavy Charged Particles in Biology and Medicine","subitem_description_type":"Other"}]},"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":"Ito, Hiroko"}],"nameIdentifiers":[{"nameIdentifier":"665422","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"伊藤 浩子","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"665423","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":"conference object","resourceuri":"http://purl.org/coar/resource_type/c_c94f"}]},"item_title":"Carbon ion treatment planning using a commercial RTP at NIRS","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Carbon ion treatment planning using a commercial RTP at NIRS"}]},"item_type_id":"10005","owner":"1","path":["28"],"pubdate":{"attribute_name":"公開日","attribute_value":"2004-01-21"},"publish_date":"2004-01-21","publish_status":"0","recid":"67707","relation_version_is_last":true,"title":["Carbon ion treatment planning using a commercial RTP at NIRS"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T20:34:37.902255+00:00"}