Measurement 9-3
Measurement
Tools
Function
HR
Measures the time of n (n≤8) cardiac cycles and calculates the heart
rate in M mode image.
Velocity
Calculates the average velocity by measuring the distance and time
between two points.
9.2.3 Doppler General Measurements
Doppler general measurements refer to general measurements on PW/CW mode images.
The measurements listed below can be performed:
Measurement
Tools
Function
Time 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).
D Velocity
On the Doppler mode image, measure velocity, PG (pressure
gradient) and spectrum correction angle of a point on the Doppler
spectrum waveform and etc.
Acceleration
Measure the velocities of two points and their time interval on the
Doppler image, and calculates the acceleration, pressure gradient,
velocity difference and correction angle.
D Trace
On the PW mode image, one or several Doppler waveforms are
traced to obtain speed and PG, etc.
PS/ED
Measure the Peak Systolic (PS) velocity and End Diastolic (ED)
velocity on the Doppler spectrum, and calculates resistance index
(RI), S/D and correction angle.
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