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- Title
Systolic prospectively ECG-triggered dual-source CT angiography for evaluation of the coronary arteries in heart transplant recipients.
- Authors
Bastarrika G; Broncano J; Arraiza M; Azcárate PM; Simon-Yarza I; Levy Praschker BG; Pueyo JC; Zubieta JL; Rabago G; Bastarrika, Gorka; Broncano, Jordi; Arraiza, María; Azcárate, Pedro M; Simon-Yarza, Isabel; Levy Praschker, Beltrán G; Pueyo, Jesús C; Zubieta, José L; Rabago, Gregorio
- Abstract
<bold>Objectives: </bold>To assess feasibility, image quality, and radiation dose of prospectively ECG-triggered coronary CT angiography (CTA) in orthotopic heart transplant (OHT) recipients.<bold>Methods: </bold>47 consecutive OHT recipients (40 men, mean age 62.1 ± 10.9 years, mean heart rate 86.3 ± 14.4 bpm) underwent dual-source CTA to rule out coronary allograft vasculopathy in a prospectively ECG-triggered mode with data acquisition during 35% to 45% of the cardiac cycle. Two independent observers blindly assessed image quality on a per-segment and per-vessel basis using a four-point scale (1-excellent, 4-not evaluable). Scores 1-3 were considered acceptable for diagnosis. Multivariate analysis was performed to evaluate differences between image quality scores obtained at different reconstruction intervals. Effective radiation doses were calculated.<bold>Results: </bold>671 coronary segments were evaluated. Interobserver agreement on the image quality was κ=0.75. Diagnostic image quality was observed in 93.9%, 95.5% and 93.3% of the segments at 35%, 40% and 45% reconstruction intervals. Mean image quality score was 1.5 ± 0.7 for the entire coronary tree, 1.4 ± 0.7 for the RCA, 1.6 ± 0.8 for the LCA and 1.6 ± 0.7 for the Cx at the best reconstruction interval. Estimated mean radiation dose was 4.5 ± 1.2 mSv.<bold>Conclusion: </bold>Systolic prospectively ECG-triggered CTA allows diagnostic image quality coronary angiograms in OHT recipients at low radiation doses.
- Publication
European Radiology, 2011, Vol 21, Issue 9, p1887
- ISSN
0938-7994
- Publication type
journal article
- DOI
10.1007/s00330-011-2126-2