An intra-individual comparison of low-keV photon-counting CT versus energy-integrating-detector CT angiography of the aorta
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- This retrospective study aims to provide an intra-individual comparison of aortic CT angiographies (CTAs) using first-generation photon-counting-detector CT (PCD-CT) and third-generation energy-integrating-detector CT (EID-CT). High-pitch CTAs were performed with both scanners and equal contrast-agent protocols. EID-CT employed automatic tube voltage selection (90/100 kVp) with reference tube current of 434/350 mAs, whereas multi-energy PCD-CT scans were generated with fixed tube voltage (120 kVp), image quality level of 64, and reconstructedThis retrospective study aims to provide an intra-individual comparison of aortic CT angiographies (CTAs) using first-generation photon-counting-detector CT (PCD-CT) and third-generation energy-integrating-detector CT (EID-CT). High-pitch CTAs were performed with both scanners and equal contrast-agent protocols. EID-CT employed automatic tube voltage selection (90/100 kVp) with reference tube current of 434/350 mAs, whereas multi-energy PCD-CT scans were generated with fixed tube voltage (120 kVp), image quality level of 64, and reconstructed as 55 keV monoenergetic images. For image quality assessment, contrast-to-noise ratios (CNRs) were calculated, and subjective evaluation (overall quality, luminal contrast, vessel sharpness, blooming, and beam hardening) was performed independently by three radiologists. Fifty-seven patients (12 women, 45 men) were included with a median interval between examinations of 12.7 months (interquartile range 11.1 months). Using manufacturer-recommended scan protocols resulted in a substantially lower radiation dose in PCD-CT (size-specific dose estimate: 4.88 ± 0.48 versus 6.28 ± 0.50 mGy, p < 0.001), while CNR was approximately 50% higher (41.11 ± 8.68 versus 27.05 ± 6.73, p < 0.001). Overall image quality and luminal contrast were deemed superior in PCD-CT (p < 0.001). Notably, EID-CT allowed for comparable vessel sharpness (p = 0.439) and less pronounced blooming and beam hardening (p < 0.001). Inter-rater agreement was good to excellent (0.58–0.87). Concluding, aortic PCD-CTAs facilitate increased image quality with significantly lower radiation dose compared to EID-CTAs…
Autor(en): | Jan-Lucca Hennes, Henner HuflageORCiD, Jan-Peter GrunzORCiD, Viktor HartungORCiD, Anne Marie Augustin, Theresa Sophie PatzerORCiD, Pauline Pannenbecker, Bernhard Petritsch, Thorsten Alexander Bley, Philipp GruschwitzORCiD |
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URN: | urn:nbn:de:bvb:20-opus-355568 |
Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
Institute der Universität: | Medizinische Fakultät / Institut für diagnostische und interventionelle Radiologie (Institut für Röntgendiagnostik) |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | Diagnostics |
ISSN: | 2075-4418 |
Erscheinungsjahr: | 2023 |
Band / Jahrgang: | 13 |
Heft / Ausgabe: | 24 |
Aufsatznummer: | 3645 |
Originalveröffentlichung / Quelle: | Diagnostics (2023) 13:24, 3645. https://doi.org/10.3390/diagnostics13243645 |
DOI: | https://doi.org/10.3390/diagnostics13243645 |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit |
Freie Schlagwort(e): | CT angiography; aorta; photon-counting-detector CT; radiation dose reduction; spectral imaging |
Datum der Freischaltung: | 15.05.2024 |
Datum der Erstveröffentlichung: | 12.12.2023 |
Lizenz (Deutsch): | ![]() |