Yuxiang Ye1, Thomas C. Basse-Luesekrink1,
Paula Arias2, Kai Hu2, Thomas Kampf1,
1Department for Experimental Physics 5, University of Wuerzburg, Wuerzburg, Bavaria, Germany; 2Deptment of Internal Medicine I, University Hospital Wuerzburg; 3Institute for Virology & Immunobiology, University of Wuerzburg, Germany; 4MRB Research Center, Magnetic-Resonance-Bavaria, Wuerzburg, Germany
MR Cell tracking with iron oxide labeling has high sensitivity but could be severely interfered by strong local magnetic susceptibility effects. We show that Fluorine-19 MRI could unambiguously detect blood monocytes/macrophages labeled with perfluorocarbon emulsion infiltrating the haemorrhagic myocardial infarct (MI) core both in vivo and ex vivo in a rat model at 7-T, despite the presence of strong local magnetic susceptibility effects caused by degraded hemoglobin products in microvascular obstruction or haemorrhage, which often occurs after reperfusion therapy . This finding suggests that Fluorine-19 MRI could be a better approach for MR cell tracking in where local T2* effects interfere the detection of magnetically labeled cells.