Figure 35.

A right dominant double aortic arch. A, Three different views from a contrast enhanced 3D volume rendering from the lateral (left), posterior angled cephalad (middle) and anterior angled caudad (right). Note the ring in the center. B, Dark blood imaging of the trachea in the sagittal (left) and coronal views (right). Note the narrowing distally on the sagittal view and how both arches can be visualized in cross-section on the coronal (arrows). LAO indicates left aortic arch; and RAO, right aortic arch.