Chapter 7 - Working With Measurements
Measuring in the 2D Window
Terason t3000 / Echo Ultrasound System User Guide
161
The following table lists the measurements for each trimester. The label shows on the 2D
Image Display, and in the menu to select the measurement. When selecting a
measurement, if you do not see the needed measurement, check the Trimester value. You
may need to set the trimester to access the needed measurement.
If you make all four AFI measurements, the Terason application shows the AFI total.
OB Measurements
First Trimester Measurement
Label
Second & Third Trimester
Measurement
Label
Abdominal Circumference
AC
Abdominal Circumference
AC
Bi-Parietal Diameter
BPD
Amniotic Fluid Index Quadrant 1
AFI Q1
Crown Rump Length
CRL
Amniotic Fluid Index Quadrant 2
AFI Q2
Femur Length
FL
Amniotic Fluid Index Quadrant 3
AFI Q3
Gestational Sac Diameter Width
GSDW
Amniotic Fluid Index Quadrant 4
AFI Q4
Gestational Sac Diameter Height
GSDH
Abdominal Anterior-Posterior Diameter APD
Gestational Sac Diameter Length
GSDL
Abdominal Transverse Diameter
APTD
Head Circumference
HC
Bi-Parietal Diameter
BPD
Nuchal Translucency
NT
Cerebellum Size
CER
Yolk Sac Size
YS
Cis Magnum Size
CMAG
Crown Rump Length
CRL
Fibula Length
FIB
Femur Length
FL
Head Circumference
HC
Humerous Length
HL
Lateral Ventrical Width
LV
Nuchal Skin Fold Thickness
NSF
Nuchal Translucency (second
trimester only)
NT
Occipital Frontal Diameter
OFD
Outer Orbital Diameter
OOD
Inner Orbital Diameter
IOD
Right Foot Length
RFT
Left Foot Length
LFT
Radius Length
RAD
Tibia Length
TIB
Ulna Length
ULN