Fig. 4

In-vivo data. Example averaged co-registered magnitude trace dataset showing all recorded b-values (a), averaged magnitude signal across the region-of-interest (highlighted in the small inset) of the same volunteer with error bars showing variations among diffusion encoding directions together with a mono-exponential fit for b ≥ 200 mm²/s to distinguish the perfusion contribution (b). Mean magnitude signals across all volunteers and repetitions together with the mean over all measurements and corresponding mono-exponential fits (c). Deviations from a purely mono-exponential model are discernable for small b-values (b < 150 mm²/s) in b and c. Note that the plots b and c have logarithmic y-axes