Measurement 7-3
Measures the distance and time between two points and calculates the
slope.
Measures the time of n (n≤8) cardiac cycles and calculates the heart rate in
M mode image.
Calculates the average velocity by measuring the distance and time
between two points.
7.2.3 Doppler General Measurements
Doppler general measurements refer to general measurements on PW/CW-mode images.
The measurements listed below can be performed:
The time interval between any two points.
N intervals (n≤8) are measured to calculate a PW mode derived HR
value in Beats Per Minute (BPM).
On the Doppler mode image, velocity and PG (pressure gradient) of a
point on the Doppler spectrum waveform are measured.
Velocity and time interval between two points are measured to calculate
speed difference and acceleration.
On the PW mode image, one or several Doppler waveforms are traced
to obtain speed and PG, etc.
Velocity and PG between two peaks on the Doppler spectrum to
calculate RI (resistance index) and PS/ED (peak systolic/end diastolic).
Blood flow through some vascular cross section per unit time.
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