{"created":"2023-07-27T06:29:46.795572+00:00","id":14542,"links":{},"metadata":{"_buckets":{"deposit":"62dea5be-bd5f-41d3-be11-72995eccd391"},"_deposit":{"created_by":3,"id":"14542","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"14542"},"status":"published"},"_oai":{"id":"oai:kanazawa-u.repo.nii.ac.jp:00014542","sets":["1132:1133:1134"]},"author_link":["25603","25600","25601","25604","25602","521"],"item_4_biblio_info_8":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2011-09-20","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"9","bibliographicPageEnd":"1191","bibliographicPageStart":"1183","bibliographicVolumeNumber":"67","bibliographic_titles":[{"bibliographic_title":"日本放射線技術学会雜誌"}]}]},"item_4_description_21":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The general method of measuring the half-value layer (HVL) for X-ray computed tomography (CT) using square aluminum-sheet filters is inconvenient in that the X-ray tube has to be set to stationary mode. To avoid this inconvenience, we investigated a new method using copper-pipe filters that cover the ionization chamber (copper-pipe method). Using this method, the HVL can be measured at the isocenter in the rotation modes of CT. We examined the accuracy and reproducibility of the copper-pipe method compared with those of the general method. The effective energy measured using the copper-pipe method correlated well with the general method (y=1.064x, r=0.987), and its error was 1.81±1.38%. The results indicate that the copper-pipe method enables accurate measurement of the effective energy of X-ray CT and is a convenient method suited to all general X-ray equipment as well as all X-ray CT. X線CT装置の被曝線量の把握や線量評価のためには実効エネルギーを確定する必要があるが、半価層測定はX線管の固定等により困難で煩雑であった．我々は、問題を改善するため、厚さの異なる複数の銅製パイプ型吸収体と電離箱線量計を用いて臨床条件で撮影を行い、銅減弱曲線から実効エネルギーを求める方法（銅パイプ法）について検討した．銅パイプ法と従来法は相関係数R=0.987と非常に高い相関を示した．回帰分析より、銅パイプ法による測定値（Epipe）より実効エネルギー（Eeff）　はEeff = 1.064 X Epipe　で推定できた．推定された実効エネルギーは従来法と比較して誤差1.81±1.38％であった．銅パイプ法はX線管を固定することなく、臨床条件で測定が可能であり簡便で精度の高い測定法である．銅パイプ法は全てのX線撮影装置に応用可能な汎用性に優れた実効エネルギー測定法であるとことが示唆された．","subitem_description_type":"Abstract"}]},"item_4_publisher_17":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"日本放射線技術学会"}]},"item_4_relation_28":{"attribute_name":"関連URI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"http://ci.nii.ac.jp/naid/10029482113","subitem_relation_type_select":"URI"}}]},"item_4_source_id_11":{"attribute_name":"NCID","attribute_value_mlt":[{"subitem_source_identifier":"AN00197784","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0369-4305","subitem_source_identifier_type":"ISSN"}]},"item_4_version_type_25":{"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":"飯田, 泰治"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"能登, 公也"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"三井, 渉"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"高田, 忠徳"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"山本, 友行"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"松原, 孝祐"}],"nameIdentifiers":[{},{},{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-10-03"}],"displaytype":"detail","filename":"M-PR-IIDA-H-67_1183.pdf","filesize":[{"value":"1.7 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"M-PR-IIDA-H-67_1183.pdf","url":"https://kanazawa-u.repo.nii.ac.jp/record/14542/files/M-PR-IIDA-H-67_1183.pdf"},"version_id":"4dd846f0-912f-4760-8d6a-f835789a497d"}]},"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":"銅製パイプ型吸収体を用いた新しい実効エネルギー測定法","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"銅製パイプ型吸収体を用いた新しい実効エネルギー測定法"},{"subitem_title":"A New Method of Measuring Effective Energy Using Copper-pipe Absorbers in X-ray CT","subitem_title_language":"en"}]},"item_type_id":"4","owner":"3","path":["1134"],"pubdate":{"attribute_name":"公開日","attribute_value":"2017-10-03"},"publish_date":"2017-10-03","publish_status":"0","recid":"14542","relation_version_is_last":true,"title":["銅製パイプ型吸収体を用いた新しい実効エネルギー測定法"],"weko_creator_id":"3","weko_shared_id":-1},"updated":"2023-07-28T00:45:36.163294+00:00"}