After CTPA scanning, the images were sent to the Philips EBW 4.5 working station for reconstruction, and the cardiac parameters were measured.
The CT parameters were measured as follows: The right ventricle and left ventricle volume (Fig. 1A and B) to calculate the volume ratio (RVV/LVV); The maximum trans diameter and cross-sectional area of the right and left ventricle on the transverse axial images,[5 (link)] to calculate the maximum trans diameter of the right/left ventricle (i.e., RVD/LVD-ax), and the maximum cross-sectional area ratio (RVA/LVA-ax) (Fig. 1C and D); The right and left ventricular trans diameters and cross-sectional areas were measured quantitatively at the reconstructed 4-chamber cardiac level,[6 (link),7 (link)] and their ratios, named RVD/LVD-4ch and RVA/LVA-4ch, were calculated (Fig. 1E); The diameter of the coronary sinus (CS) was measured on the transverse axial images (Fig. 1F).