| |  Online-Ressource |
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| Verfasst von: | Dillinger, Daniel [VerfasserIn]  |
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| | Overhoff, Daniel [VerfasserIn] |
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| | Ayx, Isabelle [VerfasserIn] |
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| | Kaatsch, Hanns L. [VerfasserIn] |
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| | Hagen, Achim [VerfasserIn] |
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| | Schönberg, Stefan [VerfasserIn] |
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| | Waldeck, Stephan [VerfasserIn] |
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| Titel: | Optimizing arterial vessel contrast in portal venous phase with virtual monoenergetic images from photon-counting detector CT scans of the abdomen - first clinical experiences |
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| Verf.angabe: | Daniel Dillinger, Daniel Overhoff, Isabelle Ayx, Hanns L. Kaatsch, Achim Hagen, Stefan O. Schönberg and Stephan Waldeck |
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| E-Jahr: | 2024 |
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| Jahr: | 15 March 2024 |
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| Umfang: | 14 S. |
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| Illustrationen: | Illustrationen |
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| Fussnoten: | Gesehen am 14.08.2024 |
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| Titel Quelle: | Enthalten in: Diagnostics |
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| Ort Quelle: | Basel : MDPI, 2011 |
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| Jahr Quelle: | 2024 |
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| Band/Heft Quelle: | 14(2024), 6, Artikel-ID 627, Seite 1-14 |
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| ISSN Quelle: | 2075-4418 |
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| Abstract: | Background: Photon-counting detector (PCD) computed tomography (CT) allows for the reconstruction of virtual monoenergetic images (VMI) at different thresholds. Objective: The aim of our study was to evaluate the optimal arterial contrast in portal venous (pv) scans regarding objective parameters and subjective image quality for different virtual keV levels. Methods: We identified 40 patients that underwent a CT scan with an arterial and pv phase on a PCD-CT (NAEOTOM alpha, Siemens Healthineers, Forchheim, Germany). The attenuation of abdominal arteries on pv phases was measured for different virtual keV levels in a monoenergetic+ application profile and for polychromatic (pc) arterial images. Two independent readers assessed subjective image quality, including vascular contrast in pv scans at different energy levels. Additionally, signal- and contrast-to-noise ratios (SNR and CNR) were measured. Results: Our results showed increasing arterial attenuation levels with decreasing energy levels in virtual monoenergetic imaging on pv scans with the highest attenuation at 40 keV, significantly higher than in the pc arterial phase (439 ± 97 HU vs. 360 ± 97, p < 0.001). Noise, SNR, and CNR were worse at this energy level (p < 0.001). Pv VMI showed less noise at energy levels above 70 keV (all p < 0.001). Subjective image quality was rated best at 70 keV, vascular contrast was best at 40 keV. Conclusions: Our research suggests that virtual monoenergetic images at 40 keV in Mono+ mode derived from a PCD-CT can be a feasible alternative to a true arterial phase for assessment of vessels with worse CNR and SNR. |
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| DOI: | doi:10.3390/diagnostics14060627 |
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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.
kostenfrei: Volltext: https://doi.org/10.3390/diagnostics14060627 |
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| | kostenfrei: Volltext: https://www.mdpi.com/2075-4418/14/6/627 |
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| | DOI: https://doi.org/10.3390/diagnostics14060627 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| Sach-SW: | computed tomography |
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| | computed tomography angiography |
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| | contrast noise ratio |
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| | photon-counting detector CT |
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| | signal noise ratio |
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| | spectral imaging |
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| | virtual monoenergetic imaging |
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| K10plus-PPN: | 1898654344 |
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| Verknüpfungen: | → Zeitschrift |
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Optimizing arterial vessel contrast in portal venous phase with virtual monoenergetic images from photon-counting detector CT scans of the abdomen - first clinical experiences / Dillinger, Daniel [VerfasserIn]; 15 March 2024 (Online-Ressource)
