{"created":"2023-05-15T14:59:41.842339+00:00","id":81000,"links":{},"metadata":{"_buckets":{"deposit":"ac3dcc8b-97d7-4d6a-a074-624e2a1678db"},"_deposit":{"created_by":1,"id":"81000","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"81000"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00081000","sets":["10:28"]},"author_link":["901104","901109","901111","901098","901101","901107","901102","901110","901100","901105","901106","901108","901103","901099"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2020-11-05","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Breast-dedicated PET systems are categorized into two types, a ring-shaped detector arrangement or a two-panel parallel detector arrangement. Although there are some advantages in the parallel arrangement, PET images are blurred due to the limited angular coverage. In this work, to compensate for the angular coverage issue while keeping the open space to access the breast, we proposed a third type, a round-edge detector arrangement. Using the Geant4 simulation, we evaluated the imaging performance of the three detector arrangements: a ring arrangement, a round-edge arrangement, and a parallel arrangement. Adding TOF and DOI measurement capabilities was also investigated. Each simulated system was composed of the same 50 detector blocks, for which the scintillator was a 30×30 array of 1.5×1.5×15 mm3 GAGG. We evaluated sensitivity, spatial resolution and image quality (contrast and noise). TOF (timing resolution: 500-ps and 300-ps) and DOI (7.5-mm-thickness × 2-layer) information were applied in the image reconstruction to investigate their impacts on image quality. As a result, we saw that the round-edge arrangement improved the spatial resolution and slightly reduced the image blurring, compared to the parallel one. In the non-ring arrangements, the 500-ps TOF slightly reduce the image blurring, while the 300-ps TOF eliminated it. Using the 2-layer DOI information, the contrasts of small spheres were increased in all arrangements. In conclusion, our proposed round-edge arrangement could improve the spatial resolution and reduce the image blurring with the help of TOF and DOI information. The 300-ps TOF performance was needed to eliminate the image blurring and the DOI measurement capability was preferable to obtain higher contrasts of small lesions.","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":"2020 IEEE Nuclear Science Symposium & Medical Imaging Conference","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":"Akamatsu, Go"}],"nameIdentifiers":[{"nameIdentifier":"901098","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tashima, Hideaki"}],"nameIdentifiers":[{"nameIdentifier":"901099","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ito, Shigeki"}],"nameIdentifiers":[{"nameIdentifier":"901100","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kang, Hangyu"}],"nameIdentifiers":[{"nameIdentifier":"901101","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yoshida, Eiji"}],"nameIdentifiers":[{"nameIdentifier":"901102","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Takahashi, Miwako"}],"nameIdentifiers":[{"nameIdentifier":"901103","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yamaya, Taiga"}],"nameIdentifiers":[{"nameIdentifier":"901104","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Akamatsu, Go","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"901105","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tashima, Hideaki","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"901106","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ito, Shigeki","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"901107","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kang, Hangyu","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"901108","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yoshida, Eiji","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"901109","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Takahashi, Miwako","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"901110","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yamaya, Taiga","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"901111","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":"Design study of a breast-dedicated PET system with a round-edge detector arrangement","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Design study of a breast-dedicated PET system with a round-edge detector arrangement"}]},"item_type_id":"10005","owner":"1","path":["28"],"pubdate":{"attribute_name":"公開日","attribute_value":"2020-10-23"},"publish_date":"2020-10-23","publish_status":"0","recid":"81000","relation_version_is_last":true,"title":["Design study of a breast-dedicated PET system with a round-edge detector arrangement"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T21:16:50.537990+00:00"}