Measurements
13-3
13.2.3 General Measurements - Doppler
General measurements in the D mode are also called “Doppler measurements.” The
measurement tools are as follows.
Measurement tool Function
Time The time interval between any two points.
Heart rate N intervals (n≤8) are measured to calculate a PW Mode derived
HR value in Beats Per Minute (BPM).
D Vel On the Doppler mode image, speed and PG (pressure gradient) of
a point on the Doppler spectrum waveform are measured.
Acceleration Speeds and time interval between two points are measured to
calculate speed difference and acceleration.
PS / ED Speed and PG between two peaks on the Doppler spectrum to
calculate RI (resistance index) and PS / ED (peak systolic / end
diastolic).
D Trace On the PW mode image, one or several Doppler waveforms are
traced to obtain speed and PG, etc.
VF Diam To measure the vascular diameter.
Vol Flow(Diam) To measure the vascular diameter and max (average) velocity to
calculate the flow volume.
13.3 Application Measurements
z Abdomen measurements - Used for measurements of abdominal organs (liver, gall
bladder, pancreas and kidney, etc.) and large abdominal vessels.
z OB measurements - Used for measurements of fetal growth indexes (including EFW) as
well as GA and EDD calculations. The fetus can be evaluated through growth graph
analysis and fetal biophysical profile.
z Cardiac measurements – Used for left ventricle function measurements and
measurements of main artery and vein parameters.
z Gynecology measurements - Used for the uterus, ovary and follicles, etc.
z Small Part measurements – Used for small parts such as thyroid.
z Urology measurements - Used for prostate, seminal vesicle, renal, adrenal, micturated
and testicle volume.
z Orthopedics measurements - Used for hip joint measurement.
z Peripheral vessel measurements – Used for carotid, cerebral, upper and lower
extremities vessels, etc.
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