Right-sided heart catheterization (RHC) is the gold standard for assessment of pulmonary hemodynamics in patients with pulmonary hypertension. Even at experienced centers, RHC procedures have considerable morbidity and mortality rates (1). Currently, doppler echocardiography ist the most widely adopted noninvasive method for hemodynamic assessment of pulmonary hypertension. Limited acoustic window and observer dependency are the major drawbacks of doppler echocardiography. Until now there has been a paucity of MRI data demonstrating the ability of noninvasive phase-contrast MRI (PC-MRI) either with use of 2D- or 4D-techniques to assess pulmonary hemodynamics (2-4).  The purpose of this study was to estimate mean pulmonary arterial pressure (mPAP) from high temporal resolution PC-MRI in healthy volunteers and to correlate these results with measurements from noninvasive doppler echocardiography.