Regions of interest (ROIs) placed on a diffusion-weighted image (b = 0) of the liver (a). Plots of mean signal intensity and the biexponential fit for the ROIs pre- (b) and postregistration (c). The biexponential parameters D*, D, and f were extracted. The preregistration fitted parameters were D* = 0.04 mm2/s, D = 1.3 × 10−3 mm2/s, and f = 0.17 for blue ROI, and D* = 0.014 mm2/s, D = 1.2 × 10−3 mm2/s, and f = 0.27 for green ROI. The postregistration fitted parameters were D* = 0.04 mm2/s, D = 1.0 × 10−3 mm2/s, and f = 0.25 for blue ROI, and D* = 0.063 mm2/s, D = 0.9 × 10−3 mm2/s, and f = 0.44 for green ROI.