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Coronal MR images of mouse hearts before (a) and 2 (b), 5 (c), 15 (d), 30 (e), and 60 minutes (f) post intravenous injection of PEG2000-Gd-DTPA cystine copolymer (GDCP) (A), PEG1000-GDCP (B), and PEG500-GDCP (C) at a dose of 0.05 mmol-Gd/kg.
