
User Manual
5-32
AFI (Amniotic Fluid Index)
This measures the amniotic uid index. Measurements are performed by dividing the pregnant woman’s
abdomen into four parts. The distance between the fetus and the farthest point of each area is measured.
To obtain the specic image from each quadrant plane, press the Freeze button to switch to the diagnosis
mode. After obtaining the image, press the Freeze button again to return to the measurement mode.
Calculating Estimated Fetal Weight (EFW)
Estimated fetal weight is calculated automatically when the following items are measured. For information
on formulae used for EFW calculation, see ‘Estimated Fetal Weight Formula’ in the Reference Manual – Part 1.
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BPD and AC
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BPD and FL, FTA
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BPD and APTD, TTD, FL
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BPD and APTD, TTD, SL
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BPD and TTD
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AC and FL
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BPD and AC, FL
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HC and AC, FL
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BPD and HC, AC, FL
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AC
NOTE: For reference, the Osaka University/Tokyo University methods are mainly used in Asia, the
Merz method in Europe, and the Shepard/Hadlock methods in the Americas.
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