User Manual
5-28
Automatic Calculation
Some items in the measurement menu are automatically calculated based on measurements of other
items.
■
HC
This is automatically calculated using the following formula, provided there are measured BPD and OFD
values.
Exception: when you use Merz reference,
■
AC
This is automatically calculated using the following formula, provided there are measured APD and TAD
values.
Exception: when you use Merz reference,
■
FTA
This is automatically calculated using the following formula, provided there are measured APD and TAD
values.
■
ThC
This is automatically calculated using the following formula, provided there are measured APTD and
TTD values.
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.
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