Fig. 1

A patient with stress-induced ischemia in the inferior LV wall with a significant stenosis in the right coronary artery. a Rest and stress perfusion maps in basal, mid-ventricular and apical short-axis image of the left ventricle acquired using the dual sequence, single contrast bolus CMR perfusion mapping approach, showing stress-induced ischemia in the inferior LV wall (arrows). b Rest and stress polar plot PET perfusion maps obtained by dynamic 13N–NH3 imaging showing stress-induced ischemia in the inferior LV wall (arrows) corresponding well with the CMR findings. The central part of the polar plot represents the LV apex and the periphery represents the basal parts of the LV. Of note, the colors for PET and CMR perfusion maps are different and in concordance with colors typically used for each method. Furthermore, the color scales in this case are different for the two methods to optimize visualization of regional pathology. CMR = cardiovascularmagnetic resonance, LV = left ventricle/left ventricular, MP = myocardial perfusion, PET = positron emission tomography