<p>(A) <sup>19</sup>F MRS of labeled hNSCs and a KF solution as internal standard to quantify the amount of <sup>19</sup>F atoms per cell (B) high resolution <sup>1</sup>H MR image (left), acquired during the same session of the labeled cells <sup>19</sup>F MR image (center). <sup>1</sup>H and <sup>19</sup>F images are then merged to obtain a correct spatial localization (right).</p