{"created":"2021-03-01T05:59:58.692997+00:00","id":7525,"links":{},"metadata":{"_buckets":{"deposit":"41abc15e-df6d-4a67-b2ac-dfae61f44c9d"},"_deposit":{"id":"7525","owners":[],"pid":{"revision_id":0,"type":"depid","value":"7525"},"status":"published"},"_oai":{"id":"oai:kitami-it.repo.nii.ac.jp:00007525","sets":["1:87"]},"author_link":["38540","38541","38542","38543"],"item_1646810750418":{"attribute_name":"出版タイプ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_ab4af688f83e57aa","subitem_version_type":"AM"}]},"item_3_biblio_info_186":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2011","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"5","bibliographicPageEnd":"640","bibliographicPageStart":"635","bibliographicVolumeNumber":"6","bibliographic_titles":[{"bibliographic_title":"International Journal of Computer Assisted Radiology and Surgery"}]}]},"item_3_description_184":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Purpose: X-ray computed tomography (CT) images in the\ndento-alveolar region are sometimes rendered unusable for\ndiagnostic purposes due to the appearance of streak artifacts.\nThe purpose of the study is to reduce streak artifacts\nappeared on dental and maxillofacial X-rayCT images by the\napplication of modified iterative restoration method.\nMethods: We took advantage of the aspect that adjacent CT\nimages often depict very similar anatomical structures within\nthe resulting collection of thin-slice images. CT images\nhaving streak artifacts were processed using the projection\ndata of adjacent CT images. A modified iterative correction,\nthe maximum likelihood-expectation maximization\n(ML-EM) reconstruction algorithm, was employed to reduce\nthe streak artifact caused by metallic materials in the oral\ncavity. It approximates between the processed image and the\noriginal projection data. First, the projection data of an intact\nimage were obtained, and then, the next image that had streak\nartifacts was processed. The projection data of the processed\nimage were obtained, and the ML-EM method was applied\nto the next image again. Then, the successive iterative restoration\nwas carried out.\nResults: Twelve adjacent images were processed. Each\niterative restoration was carried out fifty times. Streak artifacts\nwere observed on processed images at the initial stage,\nbut some of them either suppressed or disappeared as the\niteration progressed.\nConclusions: The modified ML-EM method was effective to\nreduce streak artifacts in X-ray CT images in dento-alveolar\nregion.","subitem_description_type":"Abstract"}]},"item_3_publisher_212":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Springer"}]},"item_3_relation_191":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"http://doi.org/10.1007/s11548-010-0544-2","subitem_relation_type_select":"DOI"}}]},"item_3_select_195":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_select_item":"author"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Dong, Jian","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kondo, Atsushi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Abe, Kosuke","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Hayakawa, Yoshihiko","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2016-11-22"}],"displaytype":"detail","filename":"Dong etal_JCARSVol6No5 (2011)635-640.pdf","filesize":[{"value":"362.1 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"Dong etal_JCARSVol6No5 (2011)635-640.pdf","url":"https://kitami-it.repo.nii.ac.jp/record/7525/files/Dong etal_JCARSVol6No5 (2011)635-640.pdf"},"version_id":"3be7b5d3-c119-49d4-a69f-b8ca7c2f303d"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"X-ray CT image","subitem_subject_scheme":"Other"},{"subitem_subject":"Iterative restoration","subitem_subject_scheme":"Other"},{"subitem_subject":"Streak artifact reduction","subitem_subject_scheme":"Other"},{"subitem_subject":"Dento-alveolar imaging","subitem_subject_scheme":"Other"},{"subitem_subject":"Maxillofacial imaging","subitem_subject_scheme":"Other"}]},"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":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Successive iterative restoration applied to streak artifact reduction in X-ray CT image of dento-alveolar region","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Successive iterative restoration applied to streak artifact reduction in X-ray CT image of dento-alveolar region","subitem_title_language":"en"}]},"item_type_id":"3","owner":"1","path":["87"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2012-06-12"},"publish_date":"2012-06-12","publish_status":"0","recid":"7525","relation_version_is_last":true,"title":["Successive iterative restoration applied to streak artifact reduction in X-ray CT image of dento-alveolar region"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-12-13T02:20:07.674524+00:00"}