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Figure 1 Example of PET polar maps. In healthy volunteers (three polar maps at right) MBF reserve (top polar map; 280% = ratio 2.8) and 18FDG uptake (middle polar map; 51 µmol/min per 100 g) are more or less homogeneously distributed throughout the left ventricle. The PET polar maps in a patient with IDC (three polar maps at left) show confluent regions with mismatch (bottom polar map) (i.e., impaired flow reserve [top polar map; mean 210% = ratio 2.1]) paralleled by increased 18FDG uptake (mean 60 µmol/min per 100 g). Flow reserve units are percent hyperemic blood flow related to rest blood flow. Mismatch units are presented as standard deviations of a normal data base. A = anterior; L = lateral; I = inferior; S = septal.
