Synthesized effective atomic numbers for commercially available dual-energy CT

Reports of Practical Oncology and Radiotherapy 25 巻 4 号 692-697 頁 2020 発行
アクセス数 : 312
ダウンロード数 : 53

今月のアクセス数 : 5
今月のダウンロード数 : 6
ファイル情報(添付)
RepPractOncolRadiother_25_692.pdf 792 KB 種類 : 全文 エンバーゴ : 2021-09-01
タイトル ( eng )
Synthesized effective atomic numbers for commercially available dual-energy CT
作成者
Yokomachi Kazushi
Fujioka Chikako
収録物名
Reports of Practical Oncology and Radiotherapy
25
4
開始ページ 692
終了ページ 697
抄録
Purpose: The objective of this study was to assess synthesized effective atomic number (Zeff) values with a new developed tissue characteristic phantom and contrast material of varying iodine concentrations using single-source fast kilovoltage switching dual-energy CT (DECT) scanner.
Methods: A newly developed multi energy tissue characterisation CT phantom and an acrylic phantom with various iodine concentrations of were scanned using single-source fast kilovoltage switching DECT (GE-DECT) scanner. The difference between the measured and theoretical values of Zeff were evaluated. Additionally, the difference and coefficient of variation (CV) values of the theoretical and measured values were compared with values obtained with the Canon-DECT scanner that was analysed in our previous study.
Results: The average Zeff difference in the Multi-energy phantom was within 4.5%. The average difference of the theoretical and measured Zeff values for the acrylic phantom with variation of iodine concentration was within 3.3%. Compared to the results for the single-source Canon-DECT scanner used in our previous study, the average difference and CV of the theoretical and measured Zeff values obtained with the GE-DECT scanner were markedly smaller.
Conclusions: The accuracy of the synthesized Zeff values with GE-DECT had a good agreement with the theoretical Zeff values for the Multi-Energy phantom. The GE-DECT could reduce the noise and the accuracy of the Zeff values than that with Canon-DECT for the varying iodine concentrations of contrast medium.
Advances in knowledge: The accuracy and precision of the Zeff values of the contrast medium with the GE-DECT could be sufficient with human equivalent materials.
著者キーワード
Effective atomic numbers
Dual-energy CT
Beam-hardening
言語
英語
資源タイプ 学術雑誌論文
出版者
Elsevier
発行日 2020
権利情報
© 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
This is not the published version. Please cite only the published version. この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。
出版タイプ Author’s Original(十分な品質であるとして、著者から正式な査読に提出される版)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 1507-1367
[DOI] 10.1016/j.rpor.2020.02.007
[DOI] https://doi.org/10.1016/j.rpor.2020.02.007
[PMID] 32684854
備考 Post-print version/PDF may be used in an institutional repository after an embargo period of 12 months. (Published: July–August 2020)