Measurement 8-3
Measurement
Tools
Function
HR
Measures the time of n (n≤8) cardiac cycles and calculates the heart rate in
M mode images.
Velocity
Calculates the average velocity by measuring the distance and time
between two points.
8.2.3 Doppler General Measurements
Doppler general measurements are general measurements on PW/CW-mode images. The
measurements listed below can be performed:
Tools
Function
Time Measures the time interval between any two points.
HR
N intervals (n≤8) are measured to calculate a PW mode derived HR value in
Beats Per Minute (BPM).
Velocity
On Doppler mode images, velocity and PG (pressure gradient) of a point on
the Doppler spectrum waveform are measured.
Acceleration
The velocity and time interval between two points are measured to calculate
the speed difference and acceleration.
D Trace
On PW mode images, one or several Doppler waveforms are traced to
obtain the speed and PG, etc.
PS/ED
Velocity and PG between two peaks on the Doppler spectrum are measured
to calculate the RI (resistance index) and PS/ED (peak systolic/end
diastolic).
Measures the blood flow through a vascular cross section per unit time.
Ratio (Vel.) Measures the D velocity and calculates the ratio value for blood analysis.
Ratio (VTI)
Measures the VTI values from the spectrum and then calculates the ratio
value.
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