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FIGURE 2. PET at rest and after dipyridamole stress in 3 clinical examples. As indicated by the color bar, white indicates maximal relative perfusion; red, high perfusion; yellow, intermediate; green and blue, progressively lower perfusion in continuous graded steps. (A) Young healthy normal volunteer without risk factors for vascular disease. (B) Severe stress-induced perfusion defect. (C) Abnormal base-to-apex longitudinal perfusion gradient with only a mild stress-induced regional perfusion defect.
