{"_buckets": {"deposit": "6243de2c-2443-48b0-b2fe-5b726d9dc398"}, "_deposit": {"created_by": 21, "id": "3467", "owners": [21], "pid": {"revision_id": 0, "type": "depid", "value": "3467"}, "status": "published"}, "_oai": {"id": "oai:asahi-u.repo.nii.ac.jp:00003467", "sets": ["197"]}, "author_link": ["4210", "559", "8842", "2646", "4219", "343", "3954"], "item_10002_biblio_info_77": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2014-06-20", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "1", "bibliographicPageEnd": "17", "bibliographicPageStart": "8", "bibliographicVolumeNumber": "41", "bibliographic_titles": [{"bibliographic_title": "岐阜歯科学会雑誌"}, {"bibliographic_title": "The Journal of Gifu Dental Society", "bibliographic_titleLang": "en"}]}]}, "item_10002_description_80": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "全身用マルチスライスCT(MSCT)と歯科用コーンビームCT(CBCT)は画像濃度の特性が異なる事が報告されている。我々は、コンピューター支援(CAD)検出システムの歯を自動的に検出する機能を利用して、両者の濃度特性を比較検討した。被写体として、生体の歯や骨と同等のX線吸収を示す人工硬組織を備えた頭部ファントムを用いた。ファントムに銀合金、金銀パラジウム合金、およびストッピングで作製した模擬補綴物を装着した状態、および補綴物のない状態でCT撮影を行った。CT画像を、画像濃度を基にして歯を周囲組織から分離する機能を持つCADプログラムで処理した。画像のウインドウ幅(WW)およびウインドウ値(WL)を変えながら処理を繰り返し、最も多くの歯が識別可能であった至適WWおよびWLを求めた。歯に欠損のない患者40名のMSCTおよびCBCT画像についても同様の検討をおこなった。ファントムによる検討の結果、歯列上に補綴物がない場合、至適WW、WLは、MSCTとCBCTで大きな違いがなかった。歯列上に補綴物がある場合、CBCTのみに至適WW、WLの低下が紐められた。生体の画像による検討では、MSCTの至適WW、WLはほぼ一定であったのに対して、CBCTでは至適WW、WLが広く分散していた。MSCTとCBCTの相違は、以下の要因に因ると考えられた。\n1)MSCTは画像濃度の基準としてハンスフィールド値を採用しているが、CBCTはしていない事。\n2)CBCTの平面検出器は、MSCTの線検出盟よりも金属補綴物の影響を受けやすい事。", "subitem_description_type": "Abstract"}]}, "item_10002_full_name_75": {"attribute_name": "著者別名", "attribute_value_mlt": [{"nameIdentifiers": [{"nameIdentifier": "559", "nameIdentifierScheme": "WEKO"}, {"nameIdentifier": "9000005487291 ", "nameIdentifierScheme": "CiNii ID", "nameIdentifierURI": 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