Sentence examples for area below the waveform from inspiring English sources
First, we observe that the equivalent energy, which corresponds to the area below the waveform d k), is quite concentrated at the center of the waveform when the multipath signal has been received.
As the formula for the calculation of the PI includes the area below the waveform [ peak systolic − end-diastolic velocity)/mean velocity], the PI indirectly includes the presence or absence of an early diastolic notch.
Pulsatility index (PI) is equal to systolic (S) minus diastolic (D) amplitude value of arterial waveform, divided by the mean (M) value of the area under the waveform.
The geometric mean is calculated by dividing the area under the waveform in a definite interval (i.e. the definite integral of the waveform) by the value of the definite interval [ 15].
The gray shaded areas above and below the waveforms indicate the 95% confidence ranges for the group mean.
A scope screen shot below shows the waveform.
The same procedure was performed for the Okinawa area using the waveforms from ZMM (Fig. 1c).
