70 Chapter 4: Measurements and Calculations
Meas. & Calcs
Figure 4 Trace Calculations of the Doppler Wave Form
Acceleration Time (AT) X X
Resistive Index (RI) X X X
Note: The automatic trace tool must be used to calculate the TAM.*
Table 1: Trace Calculations by Exam Type (Continued)
Cardiac Vascular OB/Gyn
Abdominal
and Other
Time
Velocity
End Diastolic Velocity
(EDV)
Peak Velocity
(Vmax)
Acceleration
Time (AT)
Velocity Time Integral
(VTI)
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