Improved Detectability of Hyper-Dense Nodules Using Dual-Energy Computed Tomography Scanning: Phantom Study Using Simulated Liver Harboring Nodules

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タイトル ( eng )
Improved Detectability of Hyper-Dense Nodules Using Dual-Energy Computed Tomography Scanning: Phantom Study Using Simulated Liver Harboring Nodules
作成者
Bayasgalan Enkhjargal
Fukumoto Wataru
Nakamura Yuko
収録物名
Hiroshima Journal of Medical Sciences
67
3
開始ページ 63
終了ページ 69
収録物識別子
[PISSN] 0018-2052
[EISSN] 2433-7668
[NCID] AA00664312
抄録
The purpose of this study was to evaluate the detectability of hyper-dense nodules using dual-energy computed tomography (DECT) in a phantom. Arterial-phase hepatic dynamic computed tomography (CT) was conducted on small, medium, and large liver-simulating phantoms harboring simulated hypervascular tumors. We acquired 150 single-energy CT (SECT) and 150 DECT scans and measured the contrast-to-noise ratio (CNR) of the nodules. Alternative free response receiver observer characteristic (AFROC) curves of five radiologists’ readings of the SECT and DECT scans were compared to assess detectability of the hyper-dense nodules. For all phantoms, the CNR of nodules measured using DECT was significantly higher than that by using SECT (p < 0.001, all). In the AFROC study, DECT showed a significantly larger area under the curve than that with SECT (0.778 vs 0.499, p = 0.012). Detectability of high-density nodules was better with DECT scans than with SECT scans.
著者キーワード
liver tumor
hyper-dense nodule
dual-energy CT
Phantom
NDC分類
医学 [ 490 ]
言語
英語
資源タイプ 紀要論文
出版者
Hiroshima University Medical Press
発行日 2018-09
権利情報
Copyright (c) 2018 Hiroshima University Medical Press
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0018-2052
[ISSN] 2433-7668
[NCID] AA00664312
[DOI] 10.24811/hjms.67.3_63
[DOI] https://doi.org/10.24811/hjms.67.3_63