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Safety and accuracy of dual-source coronary computed tomography angiography in the pediatric population.
- Source :
- Journal of Cardiovascular Computed Tomography; Jul/Aug2012, Vol. 6 Issue 4, p252-259, 8p
- Publication Year :
- 2012
-
Abstract
- Background: High heart rates and radiation sensitivity have limited the use of coronary computed tomography angiography (CTA) in pediatric patients. Objective: A contemporary evaluation of image quality and reduction in radiation exposure with dual-source CT technology has not been reported in a large cohort of pediatric patients undergoing coronary angiography. Methods: Consecutive coronary CTA scans (n = 71) in 70 pediatric patients were retrospectively reviewed. Metoprolol was administered for heart rate control. Scans were divided by acquisition mode into 3 groups: retrospective electrocardiogram (ECG)–triggered spiral, prospective ECG-triggered, and prospective ECG-triggered high-pitch spiral scans. Heart rate, radiation dose, image quality, and diagnostic confidence were compared between groups. Results: Median decrease in heart rate with metoprolol was 24% ± 14%. Median effective age-adjusted radiation dose for the entire group was 0.97 ± 1.20 mSv. Retrospective ECG-triggered scans had a median dose of 1.71 ± 1.4 mSv, prospectively ECG-triggered scans had a median dose of 0.9 ± 1.1 mSv, and prospectively ECG-triggered high-pitch spiral scans had a median effective dose of 0.27 ± 0.4 mSv. The difference between groups was statistically significant (P < 0.05). The contrast-to-noise ratio and the image quality score were similar between groups. Conclusion: Dual-source coronary CTA with a β-blocker protocol uniformly achieves diagnostic coronary scans at a low radiation dose in pediatric patients. Image quality and diagnostic confidence are excellent for all scan modes in a wide spectrum of patients. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19345925
- Volume :
- 6
- Issue :
- 4
- Database :
- Supplemental Index
- Journal :
- Journal of Cardiovascular Computed Tomography
- Publication Type :
- Academic Journal
- Accession number :
- 77333040
- Full Text :
- https://doi.org/10.1016/j.jcct.2012.01.004