{"created":"2023-05-15T15:03:29.402124+00:00","id":86015,"links":{},"metadata":{"_buckets":{"deposit":"9c74e657-7a5a-42bd-a191-285083fd727f"},"_deposit":{"created_by":1,"id":"86015","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"86015"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00086015","sets":["10:29"]},"author_link":["1041841","1041849","1041844","1041848","1041850","1041842","1041845","1041852","1041843","1041846","1041851","1041847","1041853","1041840"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2022-04-17","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"[Purpose] We developed the world’s first helmet-type time-of-flight (TOF) PET, which had a hemispherical detector arrangement. The developed system is characterized as its high-performance and compactness as well as an unusual seat-type design which enables keeping the subject’s eye view wide. Here, we report the basic performance characteristics and the first FDG imaging results of healthy volunteers. \n\n[Methods] The helmet-type PET consisted of 54 detectors. The 45 detectors were arranged to form a hemisphere and the other 9 detectors were placed to form a half-ring behind the neck. The detector was composed of 12×12 lutetium fine silicate (LFS) scintillators (4×4×10 mm3) connected to a 12×12 silicon photomultiplier (SiPM) array with one-to-one coupling. The energy window was 450–590 keV and the coincidence time window was 3.6 ns. Image reconstruction was performed using 3D-OSEM with 4 iterations and 8 subsets. The performance was characterized based on the NEMA NU2 standards. The coincidence timing resolution was measured using a 22Na point source. 18F-FDG PET and MRI were performed for 11 normal control subjects. The PET data were measured for 10 minutes starting at 45 minutes after injection of 285±23 MBq. \n\n[Results] The coincidence timing resolution was 235 ps. With the sensitivity gain of 5.7 (= 20-cm-diameter object / 3.5 cm TOF localization), the effective sensitivity was 24 cps/kBq and the effective noise-equivalent count ratio was 120 kcps@9 kBq/mL. The spatial resolution of the FBP image was 2.9 mm at the central position (1 cm offset) of the field-of-view. For the human FDG PET images, the gray matter was clearly visualized with a high contrast to the white matter. Small brain nuclei such as the substantia nigra, the red nucleus, and the superior colliculus were able to be identified.\n\n[Conclusion] We have successfully demonstrated first human imaging on the helmet-type PET.\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":"第78回日本放射線技術学会総会学術大会","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":"1041840","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Miwako, Takahashi"}],"nameIdentifiers":[{"nameIdentifier":"1041841","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yuma, Iwao"}],"nameIdentifiers":[{"nameIdentifier":"1041842","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hideaki, Tashima"}],"nameIdentifiers":[{"nameIdentifier":"1041843","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Eiji, Yoshida"}],"nameIdentifiers":[{"nameIdentifier":"1041844","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Makoto, Higuchi"}],"nameIdentifiers":[{"nameIdentifier":"1041845","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Taiga, Yamaya"}],"nameIdentifiers":[{"nameIdentifier":"1041846","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Go, Akamatsu","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1041847","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Miwako, Takahashi","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1041848","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yuma, Iwao","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1041849","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hideaki, Tashima","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1041850","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Eiji, Yoshida","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1041851","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Makoto, Higuchi","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1041852","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Taiga, Yamaya","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1041853","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":"FDG healthy volunteer imaging with the world’s first helmet-type brain PET","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"FDG healthy volunteer imaging with the world’s first helmet-type brain PET"}]},"item_type_id":"10005","owner":"1","path":["29"],"pubdate":{"attribute_name":"公開日","attribute_value":"2022-04-07"},"publish_date":"2022-04-07","publish_status":"0","recid":"86015","relation_version_is_last":true,"title":["FDG healthy volunteer imaging with the world’s first helmet-type brain PET"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T17:22:16.815020+00:00"}