Visualization of neonatal coronary arteries on multidetector row CT: ECG-gated versus non-ECG-gated technique
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Multidetector CT (MDCT) seems to be a promising tool for detection of neonatal coronary arteries, but whether the ECG-gated or non-ECG-gated technique should be used has not been established.
To compare the detection rate and image quality of neonatal coronary arteries on MDCT using ECG-gated and non-ECG-gated techniques.
Materials and methods
Twelve neonates with complex congenital heart disease were included. The CT scan was acquired using an ECG-gated technique, and the most quiescent phase of the RR interval was selected to represent the ECG-gated images. The raw data were then reconstructed without the ECG signal to obtain non-ECG-gated images. The detection rate and image quality of nine coronary artery segments in the two sets of images were then compared. A two-tailed paired t test was used with P values <0.05 considered as statistically significant.
In all coronary segments the ECG-gated technique had a better detection rate and produced images of better quality. The difference between the two techniques ranged from 25% in the left main coronary artery to 100% in the distal right coronary artery.
For neonates referred for MDCT, if evaluation of coronary artery anatomy is important for the clinical management or surgical planning, the ECG-gated technique should be used because it can reliably detect the coronary arteries.
KeywordsMultidetector CT Coronary arteries Neonates
We would like to express our appreciation to Mr. Larry Chia-Hon Chen (Philips Medical Systems, Taiwan) and Mr. Leon Wei-Chun Lee (Unison Tek Co. Ltd., Taiwan) for their assistance in improving the quality of neonatal cardiac CT.
- 23.Lee T, Tsai IC, Fu YC et al (2006) Using multidetector-row CT in neonates with complex congenital heart disease to replace diagnostic cardiac catheterization for anatomical investigation: initial experiences in technical and clinical feasibility. Pediatr Radiol 36:1273–1282PubMedCrossRefGoogle Scholar