Figure 1.
Schematic illustration of labeling mesenchymal stem cells for in vivo non-invasive imaging. SPIO: Small superparamagnetic iron oxide; NIS: Sodium iodide symporter; HSV-TK: Herpes simplex virus-thymidine kinase; EGFP: Enhanced green fluorescent protein; [18F]FHBG: 9-(4-[F]fluoro-3-hydroxymethylbutyl) guanine.