U60 Diagnostic Ultrasound System User Manual Obstetric Measurements and Calculations
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8.1.1. GS
1. In the B-Obstetric measurement menu, roll the trackball to highlight the menu GS, Select
Single, 2-Axis or 3-Axis, press Set, and move the cursor to image and display “+”. For
2-Axis and 3-Axis, it is required to measure the length of two and three axis of GS
respectively, and the MA and EDD are calculated from average GS measurement results.
2. Measure GS by the method of distance measurement.
Reference Section 6.5.1Generic Measurements in B Mode.
3. The results are displayed in measurement result window.
4. To begin a new GS measurement, repeat steps 1 through 3. You can measure a maximum of
one group of data.
8.1.2. CRL
To measure CRL:
1. In the B-Obstetric measurement menu, roll the trackball to highlight the menu CRL, press Set,
and move the cursor to image and display “+”.
2. Measure CRL by the method of distance measurement.
Reference Section 6.5.1Generic Measurements in B Mode.
3. The results are displayed in measurement result window.
4. To begin a new CRL measurement, repeat steps 1 through 3. You can measure a maximum of
one group of data.
8.1.3. NT
To measure NT:
1. In the B-Obstetric measurement menu, roll the trackball to highlight the menu NT, press Set,
and move the cursor to image and display “+”.
2. Measure NT by the method of distance measurement.
Reference Section 6.5.1Generic Measurements in B Mode.
3. The results are displayed in measurement result window.
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