Measurement 8-3
8.2.2 M General Measurements
M general measurements refer to general measurements on M mode, Color M mode,
Free Xros M mode images. The measurements listed below can be performed:
Measurement
Tools
Function
Distance The vertical distance between two points.
Time The time interval between any two points.
Slope
Measures the distance and time between two points and calculates
the slope.
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.
8.2.3 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.
Vas Area Measures the area of vessels on the image.
Velocity Ratio
Measure two D velocity values on one or two spectrum and calculate
the ratio to analysis the flow information.
VTI Ratio Measure two VTI values on the spectrum and calculate the ratio.
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