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MRI images of porcine myocardium before and after USPIO labeled MSC injection. T2*-images of porcine myocardium before injection (a1–a5) and after injection (b1–b5) of USPIO-labeled MSCs. USPIO labeled MSCs are identified as hypointense areas (arrows). MSCs: mesenchymal stromal cells. USPIO: ultrasmall superparamagnetic iron-oxide.
