A6T/A6/A5 Portable Ultrasonic Diagnostic System
4701-0040-01A
3-42
3.6.2.1.2 CRL (Crown Rump Length) measurement
Function: Calculate GA based on CRL.
Measurement method:
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1. In B mode, scan and freeze the image, press
the【Calc】key to pop up the Meas & Calc
menu, move the trackball, use the cursor to
select “OB Basic”, press the【SET】key to go to
the submenu, move the trackball to select
“CRL”, press the【SET】key to go to “CRL”
measurement mode.
2. Measure CRL. See “Distance Measurement”
for the detailed method.
3. CRL measurement result is displayed in the
result window, meanwhile based on the preset
formula GA is displayed.
4. Repeat steps 1 to 3 to go to the next CRL
measurement.