GE Logiq P5 User Manual

							Generic Measurements
LOGIQ 5 Basic User Manual 7-81
Direction 2300002-100 Rev. 2
Angle
This function measures the angle between two intersecting 
planes.
1.  From the Generic Touch Panel, select Angle. 
The system displays an active caliper. 
2.  To position the caliper, move the Trackball.
3.  To fix the position of the first caliper, press Set.
The system displays a second active caliper.
4.  To position the second caliper at the apex of the angle, 
move the Trackball.
5.  To fix the position of the second caliper, press Set.
The system displays a third active caliper. 
6.  To position the third caliper, move the Trackball. 
7.  To complete the angle measurement, press Set.
The system displays the angle in the Results Window.
NOTE:  To rotate through and activate previously fixed calipers, adjust 
the Cursor Select knob. 
						

							General Measurements and Calculations
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A/B Ratio
In B-Mode and M-Mode, you can calculate A/B ratio by diameter 
or by area.
DiameterTo calculate A/B ratio by diameter:
1.  From the Generic Touch Panel, select A/B Ratio. 
2. Select ratio(Diam). 
The system displays an active caliper.
3.  Make a distance measurement of the first velocity. 
The system displays an active caliper for the second 
distance measurement.
4.  Make a distance measurement of the second velocity. 
The system displays each distance measurement and the  
A/B ratio in the Results Window.
NOTE:  The first caliper is the A velocity. The second caliper is the B 
velocity.
For details on how to make a distance measurement, See 
‘Distance measurement’ for more information..
AreaTo calculate A/B ratio by area:
1.  From the Generic Touch Panel, select A/B Ratio. 
2. Select ratio(Area). 
The system displays a trace caliper.
3.  Make a trace measurement of the A velocity.
NOTE:  To erase an open trace, move the Trackball.
The system displays a second trace caliper. 
4.  Make a trace measurement of the B velocity.
The system displays the two area measurements and the  
A/B ratio in the Results Window.
For details on how to make a trace measurement, See 
‘Circumference and area (trace) measurement’ for more 
information.. 
						

							Generic Measurements
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Direction 2300002-100 Rev. 2
M-Mode Measurements
 Figure 7-37. M-Mode Generic Study
% Stenosis
See ‘% Stenosis’ for more information.
A/B Ratio
See ‘A/B Ratio’ for more information. 
						

							General Measurements and Calculations
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Direction 2300002-100 Rev. 2
Heart Rate
To calculate the heart rate:
1.  From the Generic Touch Panel, select HR. 
The system displays an active caliper. 
2.  To position the caliper at a recognizable point in the first 
cycle, move the Trackball.
3.  To fix the first caliper, press Set.
The system displays a second active caliper.
4.  To position the caliper at the identical point in the second or 
third cycle, move the Trackball.
 Figure 7-38. Two Heart Beat Reference
5.  To complete the measurement and transfer the calculation 
to the worksheet, press Set.
NOTE:  For information about how to specify the number of heart beats 
that the system will use, See ‘Specifying measurement and 
display options’ for more information. 
						

							Generic Measurements
LOGIQ 5 Basic User Manual 7-85
Direction 2300002-100 Rev. 2
Doppler Mode Measurements
In Doppler Mode, the Generic study includes the following 
measurements:
•  PI (Pulsatility Index)
•  RI (Resistive Index)
• S/D Ratio
• D/S Ratio
• A/B Ratio
•  Max PG (Pressure Gradient)
•  Mean PG (Pressure Gradient)
•  SV (Stroke Volume)
•  HR (Heart Rate)
 Figure 7-39. Doppler Mode Generic Study
NOTE:  The following instructions assume that you do the following:
1.  In the B-Mode part of the display, scan the anatomy you 
want to measure.
2.  Go to the Doppler Mode part of the display.
3. Press Freeze. 
						

							General Measurements and Calculations
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Direction 2300002-100 Rev. 2
Pulsatility Index (PI)
1.  From the Doppler Generic Touch Panel, select PI. 
The system displays a trace caliper.
2.  To position the caliper at the beginning of the waveform 
(V
max), move the Trackball.
3.  To fix the start point, press Set.
The system displays a second active caliper.
4.  To trace the waveform from V
max to Vd move the Trackball.
5.  To complete the measurement, press Set.
The system displays V
max Vmin, Vd TAMAX, and PI in the 
Results Window.  
						

							Generic Measurements
LOGIQ 5 Basic User Manual 7-87
Direction 2300002-100 Rev. 2
Resistive Index (RI)
1.  From the Doppler Generic Touch Panel, select RI. 
The system displays an active caliper with vertical and 
horizontal dotted lines.
2.  To position the caliper at the peak systolic velocity, move the 
Trackball.
3.  To fix the measure point, press Set.
The system displays a second active caliper.
4.  To position the second caliper at the end diastolic velocity, 
move the Trackball.
5.  To complete the measurement, press Set.
The system displays V
max Vmin, and RI in the Results 
Window.  
						

							General Measurements and Calculations
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S/D or D/S Ratio
To calculate the Peak Systole/End Diastole ratio or End 
Diastole/Peak Systole ratio:
1. Select S/D or D/S. 
The system displays an active caliper with vertical and 
horizontal dotted lines.
2.  To position the caliper at peak systole (PS) or end diastole 
(ED), move the Trackball.
3.  To fix the measure point, press Set.
The system displays a second active caliper.
4.  To position the second caliper at end diastole (ED) or peak 
systole (PS), move the Trackball.
5.  To complete the measurement, press Set.
The system displays the peak systole, end diastole, and S/D 
or D/S ratio in the Results Window.  
						

							Generic Measurements
LOGIQ 5 Basic User Manual 7-89
Direction 2300002-100 Rev. 2
A/B Ratio
In Doppler Mode you can measure A/B ratio by velocity, time, or 
acceleration.
Ve l o c i tyTo measure AB ratio by velocity:
1. Select A/B. 
2. Select ratio(Velocity). 
The system displays an active caliper with vertical and 
horizontal dotted lines.
3.  To position the caliper at the A velocity, move the Trackball.
4.  To fix the measure point, press Set.
The system displays a second active caliper.
5.  To position the second caliper at the B velocity, move the 
Trackball.
6.  To complete the measurement, press Set.
The system displays the two velocity measurements and the 
A/B ratio in the Results Window. 
TimeTo measure AB ratio by time:
1. Select A/B. 
2. Select ratio(Time). 
The system displays an active caliper.
3.  To position the caliper at the A point, move the Trackball.
4.  To fix the measure point, press Set.
The system displays a second active caliper.
5.  To position the second caliper at the B point, move the 
Trackball.
6.  To complete the measurement, press Set.
The system displays the two time measurements and the  A/
B ratio in the Results Window.  
						

							General Measurements and Calculations
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A/B Ratio (continued)
AccelerationTo measure A/B ratio by acceleration:
1. Select A/B. 
2. Select ratio(Acc). 
The system displays an active caliper.
3.  Make a distance measurement of the A acceleration point. 
a.  To position the active caliper at the start point, 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 active caliper at the end point, 
move the Trackball.
A dotted line connects the measurement points.
d.  To complete the measurement, press Set.
The system displays the distance value in the Results 
Window and displays an active caliper for the second 
distance measurement.
4.  To make a distance measurement of the B acceleration 
point, repeat steps a–d. 
The system displays the two acceleration measurements 
and the A/B ratio in the Results Window.