| |  Online-Ressource |
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| Verfasst von: | Sawall, Stefan [VerfasserIn]  |
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| | Klein, Laura [VerfasserIn] |
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| | Amato, Carlo [VerfasserIn] |
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| | Wehrse, Eckhard [VerfasserIn] |
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| | Dorn, S. [VerfasserIn] |
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| | Maier, Joscha [VerfasserIn] |
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| | Heinze, Sarah [VerfasserIn] |
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| | Schlemmer, Heinz-Peter [VerfasserIn] |
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| | Ziener, Christian H. [VerfasserIn] |
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| | Uhrig, Monika [VerfasserIn] |
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| | Kachelrieß, Marc [VerfasserIn] |
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| Titel: | Iodine contrast-to-noise ratio improvement at unit dose and contrast media volume reduction in whole-body photon-counting CT |
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| Verf.angabe: | S. Sawall, L. Klein, C. Amato, E. Wehrse, S. Dorn, J. Maier, S. Heinze, H.-P. Schlemmer, C.H. Ziener, M. Uhrig, M. Kachelrieß |
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| E-Jahr: | 2020 |
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| Jahr: | 20 February 2020 |
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| Umfang: | 7 S. |
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| Fussnoten: | Gesehen am 17.12.2020 |
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| Titel Quelle: | Enthalten in: European journal of radiology |
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| Ort Quelle: | Amsterdam [u.a.] : Elsevier Science, 1990 |
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| Jahr Quelle: | 2020 |
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| Band/Heft Quelle: | 126(2020), Artikel-ID 108909, Seite 1-7 |
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| ISSN Quelle: | 1872-7727 |
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| Abstract: | Purpose - To assess the dose-normalized iodine contrast-to-noise-ratio (CNRD) improvement and contrast media reduction potential obtained with photon-counting (PC) CT compared to conventional energy-integrating (EI) CT as a function of patient size and tube voltage. - Method - Images of a semi-anthropomorphic phantom of different sizes (small, medium, large) equipped with vials containing different iodine concentrations were acquired at the SOMATOM CounT prototype CT system using tube voltages of 80 kV-140 kV. CNRD is evaluated in reconstructions obtained using the EI detector, the PC detector using a single bin, and in reconstructions obtained by statistically optimally weighting acquisitions with two bins. Iodine CNRD improvements, potential dose reduction and the potential contrast media volume reduction are reported. - Results - In general, iodine CNRD improvement increases with increasing tube voltage for all patient sizes. In particular, if only one energy bin is used, the CNRD improvement is up to 30 % (small: 10 %, medium: 18 %, large: 30 %) and up to 37 % if an optimal weighting of two bins is performed (small: 13 %, medium: 25 %, large: 37 %) which is equivalent to the potential contrast media volume reduction. The improved iodine CNRD of PC compared to EI may allow for a potential radiation dose reduction of up to 46 %. - Conclusions - All patients’ iodine contrast at given x-ray dose, and particularly medium and large sized patients acquired at higher tube voltages, may benefit from photon-counting CT. The iodine contrast improvement can be used to reduce patient dose or to reduce the amount of contrast agent that is administered. |
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| DOI: | doi:10.1016/j.ejrad.2020.108909 |
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| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext: https://doi.org/10.1016/j.ejrad.2020.108909 |
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| | Volltext: http://www.sciencedirect.com/science/article/pii/S0720048X2030098X |
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| | DOI: https://doi.org/10.1016/j.ejrad.2020.108909 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| Sach-SW: | Contrast media |
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| | Imaging |
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| | Phantoms |
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| | Radiation dosage |
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| | Tomography |
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| | X-Ray computed |
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| K10plus-PPN: | 1743126255 |
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| Verknüpfungen: | → Zeitschrift |
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Iodine contrast-to-noise ratio improvement at unit dose and contrast media volume reduction in whole-body photon-counting CT / Sawall, Stefan [VerfasserIn]; 20 February 2020 (Online-Ressource)
