{"created":"2023-05-15T15:01:38.789594+00:00","id":83621,"links":{},"metadata":{"_buckets":{"deposit":"d1356b70-887f-4838-b436-e00fe2ac5ce2"},"_deposit":{"created_by":1,"id":"83621","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"83621"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00083621","sets":["10:29"]},"author_link":["1007721","1007722"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2021-10-22","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Coincidence timing resolution (CTR) is one of the important parameters in state-of-the-art clinical positron emission tomography (PET) scanners to increase the signal-to-noise ratio of reconstructed PET images by using time-of-flight (TOF) information. The aim of this study was to enhance the CTR and energy resolution of a silicon photomultiplier (SiPM) based clinical TOF-PET detector by optimizing the crystal surface treatment used for a 20 mm long crystal geometry. The TOF-PET detector consisted of a cerium doped gadolinium fine aluminum gallate (Ce:GFAG) scintillation crystal (3.0 × 3.0 × 20 mm3, C&A, Japan) and an SiPM (Hamamatsu, S13360-3050CS, Japan) with an effective area of 3.0 × 3.0 mm2. s with Eight different types of GFAG crystal surface treatment: mechanical polishing (M.P) of all surfaces and seven different partial saw-cuts (i.e. top, ⅟₂-side lower, ½-side upper, 1-side, 2-side, 3-side, and 4-side) were used to find the optimal treatment. The timing and energy signals were extracted by using a high-frequency SiPM readout circuit and then were digitized by using a CAMAC DAQ system. The 1-side saw-cut resulted in a 14 ps better CTR (203±3 ps) and 1.9% better energy resolution (9.3%) over those of the M.P crystal (CTR=217±4 ps, energy resolution=11.2%). The ⅟₂-side saw-cut enhanced the CTR (203±3 ps), however the energy resolution (12.5%) was degraded due to the variation in light collection efficiency along the crystal depth. In conclusion, the 1-side saw-cut was the optimal crystal surface treatment in terms of CTR and energy resolution for the SiPM based TOF PET detector.","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":"2021 Virtual IEEE Nuclear Science Symposium and 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":"Kang, Hangyu"}],"nameIdentifiers":[{"nameIdentifier":"1007721","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kang, Hangyu","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1007722","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":"Optimization of GFAG Crystal Surface Treatment for SiPM Based Clinical TOF PET Detector","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Optimization of GFAG Crystal Surface Treatment for SiPM Based Clinical TOF PET Detector"}]},"item_type_id":"10005","owner":"1","path":["29"],"pubdate":{"attribute_name":"公開日","attribute_value":"2021-10-15"},"publish_date":"2021-10-15","publish_status":"0","recid":"83621","relation_version_is_last":true,"title":["Optimization of GFAG Crystal Surface Treatment for SiPM Based Clinical TOF PET Detector"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T19:14:54.512758+00:00"}