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ID 50442
本文ファイル
著者
Kawahara, Daisuke 大学院医系科学研究科(医) 広大研究者総覧
Ozawa, Shuichi 大学院医系科学研究科(医) 広大研究者総覧
Yokomachi, Kazushi
Fujioka, Chikako
Kimura, Tomoki 病院(医)
Awai, Kazuo 大学院医系科学研究科(医) 広大研究者総覧
Nagata, Yasushi 大学院医系科学研究科(医) 広大研究者総覧
キーワード
Effective atomic numbers
Dual-energy CT
Beam-hardening
抄録(英)
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.
掲載誌名
Reports of Practical Oncology and Radiotherapy
25巻
4号
開始ページ
692
終了ページ
697
出版年月日
2020
出版者
Elsevier
ISSN
1507-1367
出版者DOI
PubMedID
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
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。
関連情報URL
部局名
医系科学研究科
病院
備考
Post-print version/PDF may be used in an institutional repository after an embargo period of 12 months. (Published: July–August 2020)