Observational Study for Feasibility and Performance of Sub-millisievert Coronary Computed Tomography Angiography (CCTA) for Coronary Artery Anomalies (CAA) in Paediatric Patients

Fifty paediatric patients are to be enrolled in this study. All these patients were prescribed a coronary angiography CT as part of their follow up for a known or suspected coronary artery anomaly. Computed Tomography acquisitions are performed on a Revolution CT (GE Healthcare) using a wide detector aperture (160 mm), last generation of iterative reconstruction algorithm and specific reconstruction software reducing cardiac motion artefacts. A rotation time of 0.28 sec is used, with a slice thickness of 0.625 mm and a 0.625 mm reconstruction interval. The acquisition is ECG-gated (prospective) with kV and mAs depending on BMI, heart rate and heart rate variability of patients.