OB Measurements and Calculations
LOGIQ 7 Basic User Manual 9-23
Direction 2392206-100 Rev. 1
Cardio-Thoracic Area Ratio (CTAR)
To calculate cardio-thoracic area ratio, you make two ellipse
measurements.
1. Select CTAR; an active caliper displays.
2. Make an ellipse measurement of the cardiac area:
a. To position the active caliper, 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 caliper, move the Trackball.
d. Adjust the Ellipse control; an ellipse with an initial circle
shape displays.
• To position the ellipse and to size the measured axes
(move the calipers), move the Trackball.
• To increase the size, adjust the Ellipse control in a
clockwise direction.
• To decrease the size, adjust the Ellipse control in a
counterclockwise direction.
• To toggle between active calipers, press Measure.
e. To complete the ellipse measurement, press Set.
The system displays the cardiac area measurement in
the Results Window
3. To make an ellipse measurement of the thoracic area,
repeat steps a–e.
The system displays the cardio-thoracic area ratio in the
Results Window.
USA
Europe
Tokyo
Osaka
ASUM
To Next Page
Loading...
