Due to the fact that the morphology of the ICG waveform isactually changing in morphology [58]–[61], such variability actually influence in the detection of the characteristic points andconsequently calculation of the hemodynamic parameters. Forassessing some-how the goodness of the ICG recordings, the results of our algorithm were evaluated with the failure/positiveratio (F/P ratio) previously introduced in [62]. Where termslike failed detection i.e., inaccurate detection, together withfalse positive, false negative are used, see (4). This ratio indicatethe acceptable validity and accuracy of the detection when it isbelow to 10% [62].