OB Measurements and Calculations
LOGIQ 7 Basic User Manual 9-21
Direction 2392206-100 Rev. 1
A/B Ratio
In B-Mode you can calculate A/B ratio by diameter or by area.
See ‘A/B Ratio’ for more information.
Angle
See ‘Angle’ for more information.
Antero-Postero Trunk Diameter & Transverse Trunk Diameter (APTD-TTD)
Make two distance measurements, one of the antero-postero
trunk diameter and one of the transverse trunk diameter.
1. Select APTD_TTD; an active caliper displays.
2. Make a distance measurement of the antero-postero trunk
diameter:
a. To position the active caliper at the start point, move the
Trackball.
b. To fix the start point, press Set.
The system fixes the first caliper and displays a second
active caliper.
c. To position the second active caliper at the end point,
move the Trackball.
A dotted line connects the measurement points.
d. To complete the measurement, press Set.
The system displays the distance value in the Results
Window and displays an active caliper.
3. To make a distance measurement of the transverse trunk
diameter, repeat steps a–d above.
The system displays the antero-postero trunk diameter and
the transverse trunk diameter in the Results Window.
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