Defining the mid-diastolic imaging period for cardiac CT – lessons from tissue Doppler echocardiography

Aggressive dose reduction strategies for cardiac CT require the prospective selection of limited cardiac phases. At lower heart rates, the period of mid-diastole is typically selected for image acquisition. We aimed to identify the effect of heart rate on the optimal CT acquisition phase within the period of mid-diastole.We utilized high temporal resolution tissue Doppler to precisely measure coronary motion within diastole. Tissue-Doppler...