Fig. 1From: Prognostic impact of the ratio of the main pulmonary artery to that of the aorta on chest computed tomography in patients with idiopathic pulmonary fibrosisMeasurement of the main pulmonary artery (mPA) and ascending aorta (Ao) diameters at the level of bifurcation of the pulmonary artery. The diameter of the mPA was defined as the widest diameter perpendicular to the long axis of the mPA and measurement of the ascending Ao was taken as the transverse diameterBack to article page