Cluster signal-to-noise analysis for evaluation of the information content in an image

• 資料種別: 博士論文
• タイトル: Cluster signal-to-noise analysis for evaluation of the information content in an image
• 著者・編者: ワラーンカナー, ウィーラワーニッチ
• 出版年月日等: 2018-09-25
• 出版年（W3CDTF）: 2018-09-25
• 並列タイトル等: 画像情報評価のためのクラスターシグナルノイズ分析法
• 寄与者: 築山, 能大; 三木, 洋一郎; 牧平, 清超
• 授与機関名: 九州大学
• 授与年月日: 2018-09-25
• 授与年月日（W3CDTF）: 2018-09-25
• 報告番号: 甲第14187号
• 学位: 博士（歯学）
• 博論授与番号: 甲第14187号
• 本文の言語コード: eng
• 一般注記: Objectives：(1) To develop an observer-free method of analysing image quality related to the observer performance in the detection task and (2) to analyse observer behaviour patterns in the detection of small mass changes in cone-beam CT images. / Methods：13 observers detected holes in a Teflon phantom in cone-beam CT images. Using the same images, we developed a new method, cluster signal-to-noise analysis, to detect the holes by applying various cut-off values using ImageJ and reconstructing cluster signal-to-noise curves. We then evaluated the correlation between cluster signal-to-noise analysis and the observer performance test. We measured the background noise in each image to evaluate the relationship with false positive rates (FPRs) of the observers. Correlations between mean FPRs and intra- and interobserver variations were also evaluated. Moreover, we calculated true positive rates (TPRs) and accuracies from background noise and evaluated their correlations with TPRs from observers. / Results：Cluster signal-to-noise curves were derived in cluster signal-to-noise analysis. They yield the detection of signals (true holes) related to noise (false holes). This method correlated highly with the observer performance test (R2 = 0.9296). In noisy images, increasing background noise resulted in higher FPRs and larger intra- and interobserver variations. TPRs and accuracies calculated from background noise had high correlation with actual TPRs from observers; R2 was 0.9244 and 0.9338, respectively. / Conclusions：Cluster signal-to-noise analysis can simulate the detection performance of observers and thus replace the observer performance test in the evaluation of image quality. Erroneous decision-making increased with increasing background noise.; PubMed番号 : 28749736; 元資料の権利情報 : © 2018 The Authors. Published by the British Institute of Radiology
• DOI: info:doi/10.1259/dmfr.20170147; https://doi.org/info:doi/10.1259/dmfr.20170147
• 国立国会図書館永続的識別子: info:ndljp/pid/11194626; https://dl.ndl.go.jp/pid/11194626
• コレクション（共通）: 障害者向け資料
• コレクション（障害者向け資料：レベル1）: テキストデータ
• コレクション（個別）: 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文; https://dl.ndl.go.jp/collections/A00014
• 収集根拠: 博士論文（自動収集）
• 受理日（W3CDTF）: 2018-12-03T16:15:19+09:00
• 作成日（W3CDTF）: 2018-11-05
• 記録形式（IMT）: application/pdf
• オンライン閲覧公開範囲: 国立国会図書館内限定公開
• デジタル化資料送信: 図書館・個人送信対象外
• 遠隔複写可否（NDL）: 可
• 掲載誌（URI）: http://hdl.handle.net/2324/1959090
• 連携機関・データベース: 国立国会図書館 : 国立国会図書館デジタルコレクション; https://dl.ndl.go.jp