fig5

Figure 5. From bottom to top: three anatomical levels used for diameter measurement - sino-tubular junction (C), mid-ascending aorta (B), and origin of the brachiocephalic artery (A). The larger images on the left show the double-oblique planes used to measure diameters perpendicular to the aortic axis. The smaller images on the right illustrate the plane’s orientation relative to the three main MPR axes (axial, coronal, sagittal). MPR: Multiplanar reconstruction.