Figure 7.

The τ_i-dependence of the natural logarithm of the fitting goodness measure, χ², for data from the three (Fig. 1c-f) ROIs: suspicious, NAG, and muscle. The model used was SSM(FXR-a) [Eq. (5), ${{\mathrm{R}}_{2\mathrm{S}}}^{\ast }\to \infty ,{{\mathrm{R}}_{2\mathrm{L}}}^{\ast }\to 0$], but with only two parameters (K^trans and v_e) varied. The τ_i parameter was held fixed at each value on the abscissa. The minimum χ² values are seen at τ_i = 450, 250, and 750 ms for suspicious, NAG, and muscle, respectively; with increasing uncertainties.