Measurement 8-3
8.2.2
M General Measurements
M general measurements refer to general measurements on M mode, Anatomical M mode images.The
measurements listed below can be performed:
Measurement
Tools
Description
Distance
Measures the distance of the sampling line between two random points.
Time
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. The
measurement items are described below:
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.
Volume Flow
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.
