[CT and MRI findings of pulmonary hypertension].

Although computed tomography (CT) and magnetic resonance imaging (MRI) can not measure the pulmonary arterial pressure, those can depict the morphological changes due to pulmonary hypertension, which are dilatation of main and central pulmonary artery, right ventricular hypertrophy and dilatation of right ventricle, right atrium, vena cava and coronary sinus. Right ventricular volume, mass and ejection fraction are calculated quantitatively by MRI using Simpson method. Thromboembolism can be detected by enhanced CT. Information about pulmonary blood flow and tricuspid regurgitation are given by MRI. Three dimensional MR angiography depicts the pulmonary artery as a whole. CT and MRI can detect pulmonary and congenital heart disease, the cause of pulmonary hypertension. CT and MRI are useful complementary method for evaluating pulmonary hypertension.