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Examples of coronary plaques with significant uptake on 3-h PET and low tracer activity on 1-h PET. These short-axis images of proximal left anterior descending, proximal circumflex (A), and distal right (B) coronary artery plaques show TBR of less than 1.0 on 1-h PET and uptake exceeding 1.25 TBR threshold at 3 h.
