Fig. 13

A patient with pulmonary hypertension (PH) assessed by chest CT. A Mediastinal window preset of visualization and (B) lung windowing preset of visualization clearly demonstrate the enlargement of the pulmonary trunk (white asterisk); commonly, the main pulmonary artery/ascending aortic/ratio is calculated. Generally, normal values are less than 1.0, whereas in cases of superior values, PH may be suspected