Fig. 5.

Dependence of the fluorescent signal (full circles, solid line) and of the ¹⁹F MRI signal (empty squares, dotted line) from the nanoparticle suspension on concentration. The fluorescent signal decreased at high probe concentrations due to signal quenching, while the MRI signal linearly increased. Actual fluorescent and MRI images of the test tubes with nanoparticles at different concentrations are presented below the graph