First pass perfusion imaging and analysis of signal intensity. The upper row shows still frame images of the first pass perfusion. The first image is a proton density weighted image. The subsequent images show the transit of contrast through the right ventricle, left ventricle and subsequently myocardial perfusion. ROIs can be used to measure signal intensity as a function of time to quantitatively analyze perfusion. The lower row shows time intensity curves of a single volunteer with regadenoson, dipyridamole and adenosine. The time intensity curves of the myocardium and the arterial input function during stress are shown as Myo-Stress and AIF-Stress respectively. Signal intensity is displayed as arbitrary units (A.U).