Measurement 8-3
Measurement
Tools
Description
Color Pixel
Percentage
Measures the pixel proportion of blood flow signal in the region of interest
8.2.2 M General Measurements
M general measurements refer to general measurements on M-mode, AM-mode images. The
measurements listed below can be performed:
Measurement
Tools
Description
Distance Measures the distance of the sampling line between two random points.
The time interval between any two points on M mode image.
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 on M
mode image.
Velocity
Measures the distance and time between two points on the M Mode image
and then calculates the average velocity between the two points.
8.2.3 Doppler General Measurements
Doppler general measurements refer to general measurements on PW/CW-mode images.
Measurement
Tools
Description
Time The time interval between any two points.
HR
Measure N interval (n≤8) of the cardiac cycle on Doppler image and calculates
the heart rate.
Velocity
On the Doppler mode image, measure velocity, PG (pressure gradient) and
spectrum correction angle of a point on the Doppler spectrum waveform θ.
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 θ.
D Trace
On the PW mode image, one or several Doppler waveforms are traced to
obtain speed and PG, etc.
PS/ED
Measure the velocities of Systolic Peak (PS) and Diastolic End (ED) on the
Doppler image.
Measure blood flow through some vascular cross section per unit time.
Velocity Ratio
Measure two D velocity values on one or two spectrum and calculate the ratio
to analyze the flow information.
VTI Ratio Measure two TVIs and the calculated ratio of the spectrum.
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