Figure 2.

Measurement of ascending aorta (a–c) and main pulmonary artery (d–f) diameters at the level of the pulmonary artery bifurcation using the Extended Multiplanar Reconstruction Plugin in IMPAX. Planes were manually corrected perpendicular to the centerline of ascending aorta (a,b) and main pulmonary artery (d,e) using double-oblique MPR images. The thus generated axial vessel cross sections (c,f) were measured (blue double headed arrow in (c), red double headed arrow in (f), and the widest diameter was used as maximum diameter of AA and PA, respectively. RPA and LPA diameter were measured using the same method.