Measurement and Analysis
Vivid S5/Vivid S6 User Manual 327
R2424458-100 Rev. 2
Deleting the ellipse measurements
1. While the ellipse measurement is on the screen, Trackball
the cursor to one of the anchor points of the measurement.
The selected marker turns green.
2. Press Delete on the alphanumeric keyboard.
Gestational Sac
To calculate the gestational sac, you need to make diameter
measurements in three orthogonal directions. These may be
done either sequentially or simultaneously in two scan planes.
Measuring GS on two scan planes
To display two scan planes, press the 1/2/4 key once. Get an
image in each scan plane and press
FREEZE.
1. Activate M&A and select GS (Hellman).
An active caliper appears.
• To position the active caliper at the start point, move the
Trackball.
• To fix the start point, press
SET.
The system fixes the first caliper and displays a second
active caliper.
• To position the second active caliper at the end point,
move the Trackball.
A dotted line connects the measurement points.
• To complete the measurement, press
SET.
The system displays the distance value in the Results
Window and displays an active caliper.
2. To make the second and third distance measurement,
repeat step 1.
After you complete the third distance measurement, the
system displays the gestational sac measurement in the
Results Window. It displays the three diameters d1, d2
and d3. In addition, it shows the average diameter GS and
the corresponding estimated age.
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