{"created":"2023-05-15T14:55:57.780328+00:00","id":75998,"links":{},"metadata":{"_buckets":{"deposit":"52948809-8e61-4524-bea5-967b98a0ced9"},"_deposit":{"created_by":1,"id":"75998","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"75998"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00075998","sets":["10:29"]},"author_link":["760731","760734","760729","760728","760730","760733","760732","760735"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2019-06-25","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Objectives: Trapezoid geometry crystal could improve the sensitivity significantly as compared to the conventional box geometry crystal. However, the manufacturing of trapezoid shape crystal is costly and difficult due to the complex geometry. In this study, we present a novel approach for the development of a cost-effective trapezoid crystal based small animal DOI PET detector using sub-surface laser engraving (SSLE) technique.\nMethods: A 19.3 mm long monolithic trapezoid LYSO plate (Top: 15.3 mm, bottom: 25.6 mm, thickness = 0.9 mm) was pixelized in 15 × 1 array by using SSLE to yield a top crystal pitch of 1.02 mm, a bottom crystal pitch of 1.71 mm, respectively. The three SSLE processed LYSO crystal plates were assembled each other to make 15 × 3 array. The LYSO plates were optically isolated by using enhanced specular reflector (ESR). A 7×6 array SiPM (Hamamatsu, S13360-2050VE) with a pixel pitch of 2.4 mm and 8×4 array SiPM (Hamamatsu, S13361-3050NE-04) with a pixel pitch of 3.2 mm were coupled to the top and bottom surfaces of the trapezoid LYSO array, respectively. For an optical coupling, room temperature vulcanizing (RTV) light guides with a thickness of 1 mm were inserted between the LYSO and SiPM array. In order to evaluate the DOI resolution, a collimated 511 keV photon was irradiated to the detector with different DOI positions (2, 6, 10, 14, and 18 mm). The DOI resolution was calculated by using the signal amplitude ratio of the two SiPMs (top and bottom). The SiPM output signals were multiplexed by using a resistive network, and then digitized by CAMAC DAQ.\nResults: All the 15 × 3 LYSO pixels segmented by the SSLE could be resolved clearly on the 2D flood histogram. The energy resolution of 25.0%, and the DOI resolution of 3.5 mm were obtained. \nConclusions: The feasibility of SSLE based trapezoid PET detector was demonstrated successfully. In future, a prototype trapezoid geometry small animal DOI PET scanner will be developed by using the SSLE technique.\n","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":"2019 Annual Meeting of Society of Nuclear Medicine and Moldecular Imaging","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":"Kang, Hangyu"}],"nameIdentifiers":[{"nameIdentifier":"760728","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Nishikido, Fumihiko"}],"nameIdentifiers":[{"nameIdentifier":"760729","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tashima, Hideaki"}],"nameIdentifiers":[{"nameIdentifier":"760730","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yamaya, Taiga"}],"nameIdentifiers":[{"nameIdentifier":"760731","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kang, Hangyu","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"760732","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Nishikido, Fumihiko","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"760733","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tashima, Hideaki","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"760734","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yamaya, Taiga","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"760735","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":"A novel approach for trapezoid geometry small animal DOI PET detector using SSLE technique","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"A novel approach for trapezoid geometry small animal DOI PET detector using SSLE technique"}]},"item_type_id":"10005","owner":"1","path":["29"],"pubdate":{"attribute_name":"公開日","attribute_value":"2019-06-07"},"publish_date":"2019-06-07","publish_status":"0","recid":"75998","relation_version_is_last":true,"title":["A novel approach for trapezoid geometry small animal DOI PET detector using SSLE technique"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-16T00:43:43.014588+00:00"}