(A) PET relative perfusion images in 3 different patients with severe coronary artery disease. Except for the single resting baseline inferior views shown for each patient, all other quadrant views of resting relative uptake images (lateral, anterior, and septal quadrants) were normal for all 3 patients. (B) For each of the same 3 patients, CFR throughout the left ventricle is shown. Average CFR for the whole heart and average quadrant values are shown for each quadrant. Abbreviations as in Figure 1.