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If you’ve ever had a PET scan, it works by tracking how cells use glucose. A PET scan is one of the most common imaging tools used to locate cancer in the body because it highlights areas with unusually high glucose uptake. Cancer cells consume glucose at a much higher rate than healthy cells. To support survival and growth, they activate metabolic pathways that pull glucose into the cell rapidly. During a PET scan, a glucose-based tracer circulates through the bloodstream, and cells with elevat