FujiFilm SonoSite X-Porte User Manual page 133

2 Drag the caliper to a peak velocity waveform.
To measure Velocities, Elapsed Time, Ratio, and Resistive Index (RI) or Acceleration
1 On a frozen Doppler spectral trace, tap Velocity.
A single caliper appears.
If this control is hidden, tapping More Controls displays it.
2 Drag the caliper to a peak systolic waveform.
3 Tap Velocity.
A second caliper appears.
4 Drag the second caliper to the end diastole on the waveform.
Elapsed time between the times indicated by the two calipers is calculated.
Measured velocities are given as results and a generic ratio between the velocities indicated by the two
calipers are calculated.
If the absolute value of the earlier velocity is less than that of the later velocity identified by the calipers,
Acceleration is calculated; otherwise, RI is calculated.
To measure time duration
1 On a frozen Doppler spectral trace, tap Time.
A vertical caliper appears.
If this control is hidden, tapping More Controls displays it.
2 Drag the caliper where desired.
3 Drag the second caliper where desired.
Measurements and calculations 5-5