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Figure 1 Thoracic Aorta Measurements
Transaxial slice at the lower level of the pulmonary artery bifurcation from a computed tomography coronary artery calcium scan in a patient with normal aortic dimensions showing the method for deriving the ascending and descending aortic dimensions. For interpretation, the images were transferred to a dedicated workstation (NetraMD, ScImage, Los Altos, California). The white arrows represent outer wall thoracic ascending aortic diameter and thoracic descending aortic diameter measurements perpendicular to the axis of rotation of the aorta.
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