Contour plots of the 10% errors isolines for different vessel lengths and blood flow velocities and examples of IVIM signals superimposed with simulated signals. (a) 10% isolines for different combinations of vessel lengths and blood flow velocities. The red curves correspond to the slow pool for vfast = 4 mm/s, Lfast = 50 µm and the blue curves to the fast pool for vslow = 1 mm/s, Lslow = 40 µm. (b, c) Examples of IVIM signal superimposed with simulated signals versus b-value for Δ = 24 ms in the LC. The black circles stand for the experimental data and the blue solid lines for the simulated signals with the same vslow = 1 mm/s and Lslow = 40 µm but with two different combinations of vfast and Lfast, vfast = 3 mm/s, Lfast = 70 µm, ɛ = 6.50% and vfast = 3 mm/s, Lfast = 150 µm, ɛ = 6.38%, respectively. Error bars represent SD from the averaging step.