Appendix D On-screen Controls
Instructions for Use D - 27
Doppler Measurement Tools
Selection Description
Velocity/Frequency
Velocity/Frequency
Calculates velocity or frequency on a real-time or frozen image.
Heart Rate
Heart Rate
Determines the heart rate between two delimiters.
D-Trace
Trace
Performs a manual waveform trace.
RI-S/D
Resistive Index - Systolic/Diastolic
Calculates the RI and SD ratios on a frozen Doppler spectrum.
Acceleration
Slope
Measures acceleration or deceleration of speed over time.
Time
Time
Measures time between two delimiters.
Heart Cycle
Heart Cycle
Measures the velocities, means, maximums, and ratios for one heart cycle.
Velocity Ratio
Velocity Ratio
Calculates the ratio of two velocity markers.
Auto Stats Auto Statistics
Measures the heart cycle automatically.