Like 3DE, CT cardiac angiogram (CTCA) is a volumetric technique (0.3-0.5mm isotropic resolution) and thus allows precise alignment to the plane of mitral annulus or the valve. The scan has to be acquired to cover the required diastolic phase of the cardiac cycle (prospective ECG gating with a wide padding in diastolic phase or retrospective gating with ECG modulation).
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