Fig. 8
From: Hyperpolarized 13C urea myocardial first-pass perfusion imaging using velocity-selective excitation
Stress perfusion measurements with septal infarction induced by permanent ligation of the distal anterior descending coronary artery. (left) Sum over three time frames at myocardial bolus peak. (right) corresponding perfusion curves for six AHA segments. Perfusion defect is visually observed in septal wall (blue arrow) and time curves of sector 2 (blue curve) for both modalities. LV signal spillover in the 13C urea perfusion curves stems from thinned myocardium in the infarct region. At myocardial bolus passage, the infarcted region shows strongly reduced signal. LAD is not detectable in either modality due to ligation. (a) 13C urea velocity-selective excitation. (b) 1H gadolinium based contrast agent