Experimental (points) and fitted (lines) Z-spectra in ROIs corresponding to the corpus callosum (white matter) matter and cortex (gray matter) of the rat brain obtained at the 11.7T magnetic field strength. The fitted parameters are as follows: MPF =12.9%, k=1.8 s−1, T2F = 21.9 ms, and T2B=12.0 μs for WM, and MPF = 6.1%, k=1.9 s−1, T2F = 33.3 ms, and T2B=10.0 μs for GM.