{"created":"2023-06-20T15:59:43.043395+00:00","id":17731,"links":{},"metadata":{"_buckets":{"deposit":"f591e759-cd0a-4209-9e4e-c64f8109611a"},"_deposit":{"created_by":28,"id":"17731","owners":[28],"pid":{"revision_id":0,"type":"depid","value":"17731"},"status":"published"},"_oai":{"id":"oai:redcross.repo.nii.ac.jp:00017731","sets":["172:173:642"]},"author_link":["43983","27721","67308","67311","67313","9362","15037","14984","67312","51173","67309","15027","51172","67310"],"item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2021-03-31","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"70","bibliographicPageStart":"59","bibliographicVolumeNumber":"38","bibliographic_titles":[{"bibliographic_title":"日本赤十字社和歌山医療センター医学雑誌"},{"bibliographic_title":"Medical Journal of Japanese Red Cross Wakayama Medical Center","bibliographic_titleLang":"en"}]}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"area detector computed tomography (ADCT) は、一回転で最大160 mmの広範囲撮影 (volume scan: VS) が可能であるが、コーン角の影響により投影データが不足となるマスク領域が発生する。キヤノンメディカルシステムズのVSはXact +という再構成処理によってマスク領域の一部を再構成し可視領域を拡張させる (拡張領域) 。本研究は拡張領域の画質を評価することを目的とする。\n画質評価の項目は、スライス面内の空間分解能とノイズ特性、そして実効スライス厚とcontrast-to noise ratio (CNR) 。またアーチファクトについても評価した。これらについて拡張領域とその周辺の非拡張領域、およびz軸中心で比較した。 \n拡張領域の画像は、スライス面辺縁部において使用する投影データ数の変化に起因する画質の低下が観察された。Xact+はこれらに注意することで臨床的に有用な再構成処理である。\n","subitem_description_type":"Abstract"},{"subitem_description":"The area detector computed tomography (ADCT) is capable of a wide range scan (Volume Scan: VS) of up to 160 mm per rotation. In VS, insufficient projection data that is called mask region can be generated because of the effect of cone angle. VS of Canon Medical systems employs Xact+, reconstruction processing, which can expand parts of this mask region. This study is intended to evaluate the image quality of that expanded region. \nThe evaluation items are spatial resolution in the plane, noise characteristics, effective slice thickness, contrast-to-noise ratio (CNR) and artifact. These items were compared at the slice position in the expanded region, the surrounding slice positions in the unexpanded region and the z axis center.\nIn the image of the expanded region, deterioration of the image which is attributed to the change of the projected data number, was observed at the edge of the slice plane. \nXact+ was found to be a clinically useful reconstruction process, keeping in mind the above mentioned results and limitation. \n","subitem_description_type":"Abstract"}]},"item_10001_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{}],"names":[{"name":"KOBAYASHI, Hiroyuki"}]},{"nameIdentifiers":[{}],"names":[{"name":"ICHIKAWA, Katsuhiro"}]},{"nameIdentifiers":[{}],"names":[{"name":"DONOUCHI, Kazuo"}]},{"nameIdentifiers":[{}],"names":[{"name":"HANADA, Takeshi"}]},{"nameIdentifiers":[{}],"names":[{"name":"IWAI, Kazunari"}]},{"nameIdentifiers":[{}],"names":[{"name":"Kuchii, Nobutaka"}]},{"nameIdentifiers":[{}],"names":[{"name":"UMEOKA, Shigeaki"}]}]},"item_10001_heading_23":{"attribute_name":"見出し","attribute_value_mlt":[{"subitem_heading_banner_headline":"原著","subitem_heading_language":"ja"}]},"item_10001_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"日本赤十字社和歌山医療センター"}]},"item_10001_relation_16":{"attribute_name":"情報源","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"日本赤十字社和歌山医療センター"}]}]},"item_10001_rights_15":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"日本赤十字社和歌山医療センター"}]},"item_10001_source_id_11":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN1051395X","subitem_source_identifier_type":"NCID"}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1341-9927","subitem_source_identifier_type":"ISSN"}]},"item_10001_version_type_20":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"小林, 弘幸"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"市川, 勝弘"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"堂内, 一雄"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"花田, 剛"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"岩井, 計成"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"口井, 信孝"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"梅岡, 成章"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2021-05-24"}],"displaytype":"detail","filename":"09小林.pdf","filesize":[{"value":"3.1 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"Wakayama38_09","url":"https://redcross.repo.nii.ac.jp/record/17731/files/09小林.pdf"},"version_id":"f5201e96-733b-4e61-b349-2e41f6bbf697"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"CT","subitem_subject_scheme":"Other"},{"subitem_subject":"面検出器CT","subitem_subject_scheme":"Other"},{"subitem_subject":"コーンビーム","subitem_subject_scheme":"Other"},{"subitem_subject":"アーチファクト","subitem_subject_scheme":"Other"},{"subitem_subject":"computed tomography","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"area-detector CT","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"cone beam","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"artifact","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Area-detector computed tomographyのマスク領域再構成画像の物理特性","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Area-detector computed tomographyのマスク領域再構成画像の物理特性"},{"subitem_title":"Physical characteristics of mask region reconstructed image in Area-detector computed tomography","subitem_title_language":"en"}]},"item_type_id":"10001","owner":"28","path":["642"],"pubdate":{"attribute_name":"公開日","attribute_value":"2021-05-24"},"publish_date":"2021-05-24","publish_status":"0","recid":"17731","relation_version_is_last":true,"title":["Area-detector computed tomographyのマスク領域再構成画像の物理特性"],"weko_creator_id":"28","weko_shared_id":-1},"updated":"2023-06-20T17:54:50.418921+00:00"}