8-4 Measurement
îš„ Abdomen measurements - Used for measurements of abdominal organs (liver, gall
bladder, pancreas and kidney, etc.) and large abdominal vessels.
îš„ 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.
 Cardiac measurements – Used for left ventricle function measurements and
measurements of main artery and vein parameters, etc.
îš„ Gynecology measurements - Used for the uterus, ovary and follicles, etc.
 Small Part measurements – Used for small parts such as thyroid.
îš„ Urology measurements - Used for prostate, seminal vesicle, renal, adrenal,
micturated and testicle volume.
 Orthopedics measurements – Used for hip joint measurement.
 Vascular measurements – Used for carotid, cerebral, upper and lower extremities vessels,
etc.
 EM measurements – Used for EM related full functional measurement.
8.4 Measurement Accuracy
Table 1 Error of 2D Images
Parameter Value Range Error
Distance Full screen Within ±3%
Area Full screen Within ±7%
Circ Full screen Within ±10%
Angle Full screen Within ±3%.
Volume Full screen Within ±10 %
Table 2 iScape Measurements
Parameter Probe Type Error
Distance
Linear and convex-wide
probe
Within ±5%
Micro convex probe Within ±10%
Table 3 Time/Motion Measurements
Parameter Value Range Error
Distance Full screen Within ±3 %.
Time Timeline Display Within ±2%.
Heart rate Timeline Display Within ±4%.
Velocity (PW
mode)
L14-6 and L14-6N
probe: 10-150cm/s;
Other probes: 10-
200cm/s
When angle≤60º, ≤5%.
Velocity (CW
mode)
10-200cm/s When angle≤60º, ≤5%.
Table 4 Doppler Velocity Measurements
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