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Coronal MR images of mouse hearts before (a) and 1 (b), 5 (c), 15 (d), 30 (e), and 60 minutes (f) post intravenous injection of PEGa-Gd-DTPA cystine copolymer (GDCP) (A), PEGb-GDCP (B), GDCP (C), and DTPA-BMA (D). Polymeric agents were given at a dose of 0.03 mmol/kg and DTPA-BMA was given at the standard clinical dose of 0.1 mmol-Gd/kg.
