| Online-Ressource |
Verfasst von: | Mangold, David Lukas [VerfasserIn]  |
| Salatzki, Janek [VerfasserIn]  |
| Riffel, Johannes [VerfasserIn]  |
| Kauczor, Hans-Ulrich [VerfasserIn]  |
| Weber, Tim [VerfasserIn]  |
Titel: | Dual-layer spectral CTA for TAVI planning using a split-phase protocol and low-keV virtual monoenergetic images |
Titelzusatz: | improved image quality in comparison with single-phase conventional CTA |
Verf.angabe: | David Mangold, Janek Salatzki, Johannes Riffel, Hans-Ulrich Kauczor, Tim Frederik Weber |
Jahr: | 2022 |
Umfang: | 8 S. |
Fussnoten: | First published online: 28. Dezember 2021 ; Gesehen am 29.06.2022 |
Weitere Titel: | Deutsche Zusammenfassung unter dem Titel: Verbesserte Bildqualität der TAVI-CTA eines Dual-Layer Spektral-CTs unter Verwendung eines Zwei-Phasen-Protokolls und virtuell-monoenergetischer Bilder im Vergleich zu einem konventionellen CT |
Schrift/Sprache: | Text auf Englisch, Zusammenfassung auf Deutsch und Englisch |
Titel Quelle: | Enthalten in: RöFo |
Ort Quelle: | Stuttgart [u.a.] : Thieme, 1949 |
Jahr Quelle: | 2022 |
Band/Heft Quelle: | 194(2022), 6, Seite 652-659 |
ISSN Quelle: | 1438-9010 |
Abstract: | Purpose: Adaptation of computed tomography protocols for transcatheter aortic valve implantation (TAVI) planning is required when a first-generation dual-layer spectral CT scanner (DLCT) is used. The purpose of this study was to evaluate the objective image quality of aortic CT angiography (CTA) for TAVI planning using a split-phase technique with reconstruction of 40 keV virtual monoenergetic images (40 keV-VMI) obtained with a DLCT scanner. CT angiography obtained with a single-phase protocol of a conventional single-detector CT (SLCT) was used for comparison. Materials and Methods: 75 CTA scans from DLCT were retrospectively compared to 75 CTA scans from SLCT. For DLCT, spiral CTA without ECG-synchronization was performed immediately after a retrospectively ECG-gated acquisition covering the heart and aortic arch. For SLCT, spiral CTA with retrospective ECG-gating was performed to capture the heart and the access route simultaneously in one scan. Objective image quality was compared at different levels of the arterial access route. Results : 40 keV virtual monoenergetic images of DLCT showed a significantly higher mean vessel attenuation, SNR, and CNR at all levels of the arterial access route. With 40 keV-VMI of DLCT, the overall mean aortic attenuation of all six measured regions was 589.6 ± 243 HU compared to 492.7 ± 209 HU of SLCT (p < 0.01). A similar trend could be observed for SNR (23.6 ± 18 vs. 18.6 ± 9; p < 0.01) and CNR (21.1 ± 18 vs. 16.4 ± 8; p < 0.01). No deterioration was observed for vascular noise (27.8 ± 9 HU vs. 28.1 ± 8 HU; p = 0.599). Conclusion: Using a DLCT scanner with a split-phase protocol and 40 keV-VMI for TAVI planning, higher objective image quality can be obtained compared to a single-phase protocol of a conventional CT scanner. |
DOI: | doi:10.1055/a-1717-2542 |
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/10.1055/a-1717-2542 |
| Volltext: http://www.thieme-connect.de/DOI/DOI?10.1055/a-1717-2542 |
| DOI: https://doi.org/10.1055/a-1717-2542 |
Datenträger: | Online-Ressource |
Sprache: | eng |
K10plus-PPN: | 1808548825 |
Verknüpfungen: | → Zeitschrift |
Dual-layer spectral CTA for TAVI planning using a split-phase protocol and low-keV virtual monoenergetic images / Mangold, David Lukas [VerfasserIn]; 2022 (Online-Ressource)