{"created":"2023-05-15T14:33:26.922670+00:00","id":43380,"links":{},"metadata":{"_buckets":{"deposit":"9037ab9b-78c6-4f11-b3fc-9614b8e92625"},"_deposit":{"created_by":1,"id":"43380","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"43380"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00043380","sets":["1"]},"author_link":["431501","431500","431502","431503"],"item_8_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2002-06","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"2146","bibliographicPageStart":"2129","bibliographicVolumeNumber":"47","bibliographic_titles":[{"bibliographic_title":"Physics in Medicine and Biology"}]}]},"item_8_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The Compton camera is used for imaging the distributions of gamma-ray direction in\ngamma-ray telescope for astrophysics and for imaging radioisotope distributions in\nnuclear medicine without the need for collimators. The integration of gamma-rays\non a cone is measured with the camera, so that some sort of inversion method\nis needed. Parra found an analytical inversion algorithm based on spherical\nharmonics expansion of projection data. His algorithm is applicable to the full\nset of projection data. In this paper, six possible reconstruction algorithms that\nallow image reconstruction from projections with a finite range of scattering\nangles are investigated. Four algorithms have instability problems and two\nother are practical. However, the variance of the reconstructed image diverges\nin these two cases, so that window functions are introduced with which the\nvariance becomes finite at a cost of spatial resolution. These two algorithms\nare compared in terms of variance. The algorithm based on the inversion of the\nsummed back-projection is superior to the algorithm based on the inversion of\nthe summed projection.","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":"Tomitani, Takehiro"}],"nameIdentifiers":[{"nameIdentifier":"431500","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hirasawa, Masahiko"}],"nameIdentifiers":[{"nameIdentifier":"431501","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"富谷 武浩","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"431502","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"平澤 雅彦","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"431503","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":"Image reconstruction from limited angle Compton camera deta","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Image reconstruction from limited angle Compton camera deta"}]},"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":"43380","relation_version_is_last":true,"title":["Image reconstruction from limited angle Compton camera deta"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-16T00:28:00.519199+00:00"}