FIGURE 2. Correlation of VB as calculated by 2-compartment model (VB [observed) and predicted VB (VB [predicted]) using short acquisition protocol. Input data from 1 to 10 min (10 frames) and target area from 1 to 10 min (10 frames) and from 56 to 60 min (1 frame) were used for prediction, based on polynomial function (degree 2) for data fitting. Correlation coefficient of 0.9195 was obtained.