{"created":"2023-05-15T14:49:36.039745+00:00","id":67915,"links":{},"metadata":{"_buckets":{"deposit":"69cd3cf8-d750-4f01-8b53-38635a727856"},"_deposit":{"created_by":1,"id":"67915","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"67915"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00067915","sets":["10:28"]},"author_link":["667079","667081","667080"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2004-10-22","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"A high-performance brain PET scanner, jPET-D4, which provides depth-of-interaction (DOI) information, is under development. The scanner is designed to achieve not only high spatial resolution but also high scanner sensitivity with the DOI information obtained from multi-layered thin crystals. The scanner has 5 rings of 24 detector blocks each, and the detector block consists of 1,024 GSO crystals of 2.9mm x 2.9mm x 7.5mm, which are arranged in 4 layers of 16 x 16 arrays. At this stage, a pair of detector blocks and a coincidence circuit has been assembled into an experimental prototype gantry. In this paper, as a preliminary experiment, we have investigated the performance of the jPET-D4's inherent spatial resolution and noise characteristics using the prototype system. Spatial resolution and background noise were measured by using a line source and a uniform cylinder phantom respectively. To avoid systematic error and reduce computational cost in image reconstruction, the DOI compression (DOIC) method followed by the ML-EM with accurate system modeling, that we have previously proposed, was applied. Experimental results showed that the jPET-D4 achieves less than 3mm spatial resolution over the field-of-view. Trade-off results between spatial resolution and background noise also promise an excellent performance of the scanner.","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":"IEEE 2004 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":"Yamaya, Taiga"}],"nameIdentifiers":[{"nameIdentifier":"667079","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"et.al"}],"nameIdentifiers":[{"nameIdentifier":"667080","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"山谷 泰賀","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"667081","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":"Preliminary Performance Evaluation of the Prototype System for a Brain DOI-PET Scanner: jPET-D4","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Preliminary Performance Evaluation of the Prototype System for a Brain DOI-PET Scanner: jPET-D4"}]},"item_type_id":"10005","owner":"1","path":["28"],"pubdate":{"attribute_name":"公開日","attribute_value":"2004-10-27"},"publish_date":"2004-10-27","publish_status":"0","recid":"67915","relation_version_is_last":true,"title":["Preliminary Performance Evaluation of the Prototype System for a Brain DOI-PET Scanner: jPET-D4"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T20:32:15.255687+00:00"}