Kottmaier M, et al. - Researchers compared dual-source cardiac-computed tomography (DS-CT) with transesophageal echocardiography (TEE) in terms of sensitivity and specificity for thrombus formation (TF) exclusion before atrial fibrillation (AF) ablation. Also, they assessed CT protocols with and without ECG synchronized. They noted that DS-CT not only displayed high sensitivity for left atrium (LA) thrombus detection, but also offered additional anatomic details of pulmonary veins and LA anatomy with an acceptable radiation exposure. With comparable diagnostic accuracy, non-ECG-synchronized DS-CT displayed a markedly lower radiation exposure. In patients undergoing AF ablation, DS-CT might serve as a primary method to exclude LA TF.