{"created":"2023-05-15T14:33:26.966458+00:00","id":43381,"links":{},"metadata":{"_buckets":{"deposit":"7f1a8149-48a6-4959-82c4-ca9d5d7830f6"},"_deposit":{"created_by":1,"id":"43381","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"43381"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00043381","sets":["1"]},"author_link":["431504","431505","431507","431506"],"item_8_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2003-04","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"1026","bibliographicPageStart":"1009","bibliographicVolumeNumber":"48","bibliographic_titles":[{"bibliographic_title":"Physics in Medicine and Biology"}]}]},"item_8_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Compton cameras have been developed for use in gamma-ray astronomy and\nnuclear medicine. Their defining merit is that they do not need collimators;\nhowever, on the demerit side, they need inversion procedures for image\nreconstruction, since a measured datum is proportional to the integration of\nincident gamma rays along a cone surface with the same Compton scattering\nangle. First, an iteration method was adopted for this task. Later, analytical\nmethods were found under restricted conditions. Parra (2000 IEEE Trans. Nucl.\nSci. 47 1543?50) deduced a purely analytical reconstruction algorithm for a\ncomplete set of scattering-projection data that include data at all the scattering\nangles. Tomitani and Hirasawa (2002 Phys.Med. Biol. 47 2129?45) found that\nby making a slight modification, Parra?s algorithm could be extended to the\nscattering-projection data in limited scattering angles. However, their algorithm\nneglected the effects of practical problems that cause the degradation of spatial\nresolution. Sources of degradationwere identified as noise in the energy signal\nof their front detector and the Doppler effect in the scattering process. In this\npaper, we first analyse the effects of these sources on the angular resolution\nof the scattering-projection data and then present a revised reconstruction\nalgorithm in which these two factors are incorporated. Simulation studies\non digital phantoms reveal that the algorithm can reconstruct images even\nwhen these two factors are included.","subitem_description_type":"Abstract"}]},"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":"Hirasawa, Masahiko"}],"nameIdentifiers":[{"nameIdentifier":"431504","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tomitani, Takehiro"}],"nameIdentifiers":[{"nameIdentifier":"431505","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"平澤 雅彦","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"431506","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"富谷 武浩","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"431507","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":"An analytical image reconstruction algorithm to compensate for scattering angle broadening in Compton cameras","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"An analytical image reconstruction algorithm to compensate for scattering angle broadening in Compton cameras"}]},"item_type_id":"8","owner":"1","path":["1"],"pubdate":{"attribute_name":"公開日","attribute_value":"2004-05-05"},"publish_date":"2004-05-05","publish_status":"0","recid":"43381","relation_version_is_last":true,"title":["An analytical image reconstruction algorithm to compensate for scattering angle broadening in Compton cameras"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-16T00:27:59.850418+00:00"}