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Title
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Advanced CT acquisition protocol with a third-generation dual-source CT scanner and iterative reconstruction technique for comprehensive prosthetic heart valve assessment
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Author
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Abstract
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| Objectives Multidetector CT (MDCT) is a valuable tool for functional prosthetic heart valve (PHV) assessment. However, radiation exposure remains a concern. We assessed a novel CT-acquisition protocol for comprehensive PHV evaluation at limited dose. Methods Patients with a PHV were scanned using a third-generation dual-source CT scanner (DSCT) and iterative reconstruction technique (IR). Three acquisitions were obtained: a non-enhanced scan; a contrast-enhanced, ECG-triggered, arterial CT angiography (CTA) scan with reconstructions at each 5 % of the R-R interval; and a delayed high-pitch CTA of the entire chest. Image quality was scored on a five-point scale. Radiation dose was obtained from the reported CT dose index (CTDI) and dose length product (DLP). Results We analysed 43 CT examinations. Mean image quality score was 4.1±1.4, 4.7±0.5 and 4.2±0.6 for the non-contrast-enhanced, arterial and delayed acquisitions, respectively, with a total mean image quality of 4.3±0.7. Mean image quality for leaflet motion was 3.9±1.4. Mean DLP was 28.2±17.1, 457.3±168.6 and 68.5±47.2 mGy.cm for the non-contrast-enhanced (n=40), arterial (n=43) and delayed acquisition (n=43), respectively. The mean total DLP was 569±208 mGy.cm and mean total radiation dose was 8.3±3.0 mSv (n=43). Conclusion Comprehensive assessment of PHVs is possible using DSCT and IR at moderate radiation dose. |
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Language
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English
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Source (journal)
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European radiology. - Secaucus, N.J., 1991, currens
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Publication
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Secaucus, N.J.
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2018
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ISSN
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0938-7994
[print]
1432-1084
[online]
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DOI
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10.1007/S00330-017-5163-7
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Volume/pages
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28
:5
(2018)
, p. 2159-2168
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ISI
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000429104200041
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Pubmed ID
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29234912
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Full text (Publisher's DOI)
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Full text (open access)
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