Moderated Posters session: complementary role of imaging techniquesP184Submillisievert computed tomography with model-based iterative reconstruction before pulmonary veins radiofrequency catheter ablation of atrial fibrillation: impact on radiation exposure and outcomeP185Calcium score and CT coronary angiography can be a low cost strategy for the investigation of patients with chest pain with low and intermediate predicted riskP186Impact of imaging modality on the heritability estimates of aortic root geo