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Schematic representation of the mechanism of uptake for commercial myocardial perfusion agents including 201Tl, 99mTc-sestamibi, 99mTc-tetrofosmin, and 18F-FDG (18F-fluorodeoxyglucose) in cardiac myocytes {GLT = glucose transporter; Na = sodium; K = potassium; green sphere indicates phosphate group}.
