FIGURE 5.

Parameters of the model simulating the transfer function. Left panel dispersion, as estimated by the square root of the variance of the transfer function, (σ² + τ²)^½, is linearly related to the mean transit time, τ + t_c (which equals t̄), in a manner similar to that seen for the recorded curves. Middle and right panels: σ and τ of the transfer function exhibit very scattered, approximately linear relationships to τ + t_c. Triangles denote data recorded following injection into superior vena cava; +’s or x’s denote injection into the aorta. Length of the vertical line at the average point is two standard deviations.