{"created":"2023-05-15T09:17:18.846672+00:00","id":39,"links":{},"metadata":{"_buckets":{"deposit":"0e367c6f-4ef6-4458-b02e-8ed41d343110"},"_deposit":{"created_by":15,"id":"39","owners":[15],"pid":{"revision_id":0,"type":"depid","value":"39"},"status":"published"},"_oai":{"id":"oai:iuhw.repo.nii.ac.jp:00000039","sets":["1:26"]},"author_link":["240","739","236","740"],"item_10002_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2009-01-31","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2","bibliographicPageEnd":"15","bibliographicPageStart":"7","bibliographicVolumeNumber":"13","bibliographic_titles":[{"bibliographic_title":"国際医療福祉大学紀要"},{"bibliographic_title":"Bulletin of International University of Health and Welfare","bibliographic_titleLang":"en"}]}]},"item_10002_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"動画用X線検出器のDQE(Detective Quantum Efficiency)測定方法がIEC62220-1-3 で規定されている。この規定では,検出器の残像がDQE 測定結果に影響を与えることを防ぐために,残像の影響を正確に評価する方法を定めているが,そこでは,残像がある場合とない場合の空間的NPS(Noise Power Spectrum)の比が,時間的NPS の全周波数に渡る積分値の比に等しい,という重要な仮定が証明なしになされている。本稿では,一般に実用的に使用されているX線検出器とその使用環境で満たされている2 つの条件(1.時間軸方向の定常性と 2.空間内の一様性)を前提にして,この仮定の妥当性を検討した。まず,NPS の周波数空間における積分が分散に等しいことを利用することによって,空間内の分散値が時間軸方向の分散値に等しいことを理論的に示し,この仮定が成り立つことを証明した。次にコンピュータシミュレーションによって,誤差0.4%の範囲内でこの仮定が正しいことを示した。","subitem_description_type":"Abstract"}]},"item_10002_description_6":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"The measurement procedure of the detective quantum efficiency (DQE) for detectors used in dynamic imaging is standardized in IEC62220-1-3. In this standard, a method for precisely evaluating the effect of image lag is described in order to prevent the lag from affecting DQE measurement results. In this method,however, it is implicitly assumed that the temporal noise variance is exactly the same as the spatial noise variance, which has not been proved yet. In this paper, to prove the assumption is valid, we introduced two conditions that the concerned detector be (1) stationary in the time domain and (2) uniform in the spatial domain, both being satisfied in practical X-ray detectors and in environment under which those detectors are used. First we proved theoretically in terms of equations, then confirmed experimentally by computer simulation within the limit of experimental error 0.4 %, that the assumption is valid under the above two conditions.","subitem_description_type":"Other"}]},"item_10002_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{}],"names":[{"name":"Nishiki, Masayuki"}]},{"nameIdentifiers":[{}],"names":[{"name":"Iinuma, Kazuhiro"}]}]},"item_10002_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"国際医療福祉大学"}]},"item_10002_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"13424661","subitem_source_identifier_type":"ISSN"}]},"item_10002_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":[{},{}],"nameIdentifiers":[{}]},{"creatorNames":[{},{}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2019-05-23"}],"displaytype":"simple","filename":"13_2(7-15p).pdf","filesize":[{"value":"1.1 MB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","url":{"label":"本文(PDF)","url":"https://iuhw.repo.nii.ac.jp/record/39/files/13_2(7-15p).pdf"},"version_id":"18cb2200-85be-44e8-a7d0-b0208d7ac21b"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"DQE","subitem_subject_scheme":"Other"},{"subitem_subject":"X線検出器","subitem_subject_scheme":"Other"},{"subitem_subject":"残像","subitem_subject_scheme":"Other"},{"subitem_subject":"DQE","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"X-ray detector","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"image lag","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":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"残像のある動画用X 線検出器のDQE 測定に関する一考察","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"残像のある動画用X 線検出器のDQE 測定に関する一考察"},{"subitem_title":"A discussion on the DQE measurement of X-ray detectors for dynamic imaging with image lag","subitem_title_language":"en"}]},"item_type_id":"10002","owner":"15","path":["26"],"pubdate":{"attribute_name":"公開日","attribute_value":"2012-05-11"},"publish_date":"2012-05-11","publish_status":"0","recid":"39","relation_version_is_last":true,"title":["残像のある動画用X 線検出器のDQE 測定に関する一考察"],"weko_creator_id":"15","weko_shared_id":-1},"updated":"2023-05-15T09:44:42.370630+00:00"}