{"created":"2023-05-15T15:01:05.826347+00:00","id":82882,"links":{},"metadata":{"_buckets":{"deposit":"68aa854b-b55b-45f2-84bd-150b2ecf811b"},"_deposit":{"created_by":1,"id":"82882","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"82882"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00082882","sets":["10:29"]},"author_link":["951359","951363","951354","951360","951358","951362","951353","951364","951356","951357","951361","951355"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2021-04-17","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"[Purpose] Breast-dedicated PET systems are categorized into two types: a ring-shaped detector arrangement and a dual (top and bottom) flat-panel detector arrangement. Although the flat-panel system allows imaging axillary lymph nodes from the same view as X-ray mammography, PET images are blurred (i.e. spatial resolution is degraded) along the direction connecting the detectors (defined as Z direction) due to the limited angular coverage. To compensate for this issue, we proposed a third type, a dual round-edge detector arrangement. The “round-edge” is a geometry in which the detector blocks at both edge positions were tilted toward the center of the field-of-view (FOV). For proof of concept, we developed a small prototype and evaluated the spatial resolution.\n[Methods] The prototype was composed of 32 detector blocks (Top and bottom pairs of 2 rows × 8 columns). A 14×14 array of 1.45×1.45×15 mm3 GFAG scintillator was coupled with an 8×8 array of silicon photomultiplier (SiPM) with a photosensitive area of 3.0×3.0 mm2. A 22Na Derenzo-like multi-rod phantom (rod diameters: 1.6, 2.2, 3.0, 4.0, 5.0 and 6.0 mm) was used for spatial resolution measurement. The phantom was measured in the two directions (XY plane and XZ plane) at the center of the FOV. The flat-panel arrangement was also examined for comparison. \n[Results] In the XY plane, the 1.6 mm rods were clearly resolved in both arrangements. In the XZ plane, the round-edge arrangement significantly improved the spatial resolution compared with the flat-panel arrangement. While the flat-panel arrangement could not resolve the 3.0 mm rods, the round-edge arrangement clearly resolved the 2.2 mm rods. \n[Conclusion] We have demonstrated the dual round-edge detector arrangement can provide a better spatial resolution than the conventional flat-panel arrangement.","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":"第121回日本医学物理学会学術大会","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":"Go, Akamatsu"}],"nameIdentifiers":[{"nameIdentifier":"951353","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Eiji, Yoshida"}],"nameIdentifiers":[{"nameIdentifier":"951354","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hideaki, Tashima"}],"nameIdentifiers":[{"nameIdentifier":"951355","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Shigeki, Ito"}],"nameIdentifiers":[{"nameIdentifier":"951356","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Miwako, Takahashi"}],"nameIdentifiers":[{"nameIdentifier":"951357","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Taiga, Yamaya"}],"nameIdentifiers":[{"nameIdentifier":"951358","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Go, Akamatsu","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"951359","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Eiji, Yoshida","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"951360","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hideaki, Tashima","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"951361","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Shigeki, Ito","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"951362","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Miwako, Takahashi","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"951363","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Taiga, Yamaya","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"951364","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":"Dual round-edge detector arrangement for breast PET: a proof of concept study","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Dual round-edge detector arrangement for breast PET: a proof of concept study"}]},"item_type_id":"10005","owner":"1","path":["29"],"pubdate":{"attribute_name":"公開日","attribute_value":"2021-05-27"},"publish_date":"2021-05-27","publish_status":"0","recid":"82882","relation_version_is_last":true,"title":["Dual round-edge detector arrangement for breast PET: a proof of concept study"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T20:08:48.882452+00:00"}