Measurements
Venue 50 – Basic User Manual 3-41
Direction 5446729-100 English Rev. 7
Cardio-Thoracic Area Ratio (CTAR)
To calculate cardio-thoracic area ratio, you make two ellipse
measurements.
1. Press Measure, then select CTAR.
Figure 3-43. CTAR Screen
2. Make an ellipse measurement of the cardiac area.
a. Touch the screen, and three active calipers display.
b. Move the calipers to the desired position.
c. Press Set.
The system displays the cardiac area value in the
Results Window.
3. Make an ellipse measurement of the thoracic area, repeat
step a-c above.
The system displays the CTAR value in the Results Window.
Figure 3-44. CTAR Measurement
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