{"created":"2023-05-15T14:44:43.981668+00:00","id":61146,"links":{},"metadata":{"_buckets":{"deposit":"f8f9ff50-fc26-4ecc-bd53-53bbe8df838a"},"_deposit":{"created_by":1,"id":"61146","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"61146"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00061146","sets":["10:29"]},"author_link":["605621","605622"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2005-10-29","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The jPET-D4 is a high-performance brain PET scanner which achieves not only high spatial resolution but also high scanner sensitivity by discriminating 4-layer depth-of-interaction (DOI) information. The scanner is designed to have 5 rings of 24 detector blocks each, and the detector block consists of 1,024 GSO crystals of 2.9 mm x 2.9 mm x 7.5 mm, which are arranged in 4 layers of 16 x 16 arrays. At this stage, one of the 5 block-detector rings has been assembled into the jPET-D4 gantry. In this paper, we investigate the imaging performance of the jPET-D4 prototype. In order to reduce computational cost while keeping the advantage of DOI information in iterative image reconstruction, we have proposed the DOI compression (DOIC) method which reduces data dimensions with suppressing resolution loss. We have also proposed an imaging system model optimized for the jPET-D4 which enables fast system matrix calculation while preserving image quality. These methods were applied to the real data of needle sources on a uniform background. The result shows that almost uniform spatial resolution of less than 3 mm is obtained over the field-of-view by using the 4-layer DOI information. The Hoffman 3D brain phantom was also measured to compare the jPET-D4 with the HR+ commercial scanner. The result clearly shows the excellent imaging performance of the jPET-D4. Two or more detector-rings are being assembled, and the first volunteer tests are being planned.","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 2005 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":"Yamaya, Taiga"}],"nameIdentifiers":[{"nameIdentifier":"605621","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"山谷 泰賀","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"605622","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":"The jPET-D4: Imaging Performance of the 4-Layer Depth-of-Interaction PET Scanner","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"The jPET-D4: Imaging Performance of the 4-Layer Depth-of-Interaction PET Scanner"}]},"item_type_id":"10005","owner":"1","path":["29"],"pubdate":{"attribute_name":"公開日","attribute_value":"2005-11-01"},"publish_date":"2005-11-01","publish_status":"0","recid":"61146","relation_version_is_last":true,"title":["The jPET-D4: Imaging Performance of the 4-Layer Depth-of-Interaction PET Scanner"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T21:45:43.140833+00:00"}