Fig. 4.

(a) and (b) The CDE fit to the Monte Carlo results for $g_1^{\mathrm{tot}}(\tau )$ and $g_1^{\mathrm{conv}}(\tau )$. The Monte Carlo results for different RBC speeds are indicated by the symbols and the diffuse equation fits are given by the colored solid lines. The symbols in (c) and (d) show the blood flow index ${\mathrm{BF}}_i$ determined from fitting $g_1^{\mathrm{tot}}(\tau )$ with a diffusive motion model and from fitting $g_1^{\mathrm{conv}}(\tau )$ with a convective motion model, respectively, versus the true RBC speed. The solid lines in (c) and (d) are the theoretical predictions for the ${\mathrm{BF}}_{i^{}}$s based on Eqs. (10) and (11). Here, we used 80 μm vessels spaced every 300 μm and set the hematocrit to 40%.