Figure 6:

Experimental ²H and ¹³C MR sensitivities. Pulse-acquire (A) ²H and (B) ¹³C MR spectra obtained from a small phantom containing 1 M [1-²H] or 1 M [1-¹³C]-formate in the presence of a human head load at 4 T. In addition to the formate signal, the spectra contain natural abundance signals from water (A) or lipids (B). As the magnetic field homogeneity and nutation angle was optimized on the formate sphere, the natural abundance signals are generally broad and overrotated.