Fig. 3From: In vitro labelling and detection of mesenchymal stromal cells: a comparison between magnetic resonance imaging of iron-labelled cells and magnetic resonance spectroscopy of fluorine-labelled cells 19F MRS of five samples containing Cell Sense (1) and different amounts of Cell Sense-labelled cells: 1 million (2), 5 × 105 (3), 2.5 × 105 (4), 1.25 × 105 (5). Black arrows indicate the Cell Sense fluorine signal, while the wide peak at −5 ppm is due to the resonator coil itselfBack to article page