“…Over the past decades, non-invasive imaging of the thoracic aorta had remarkable advancements, involving different imaging techniques including trans-thoracic echocardiography (TTE), trans-esophageal echocardiography, magnetic resonance imaging (MRI), computed tomography (CT), and conventional catheter angiography. Among these, CT is the most robust, reliable, and accurate non-invasive technique widely used in clinical practice both in acute and stable patients' settings; CT also allows the concomitant assessment of thoracic aorta and coronary arteries [7] , [8] , [9] . The normal diameters and ranges for thoracic aortic size have been established historically using ultrasound [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , and more recently reassessed also with CT and MR Angiography [18] , [19] , [20] , [21] .…”