GE Logiq 9 User Manual

Measurement and Analysis
LOGIQ E9 User Guide 2-17
Direction 5180302-100 Rev. 1
Circumference and area (trace) measurement (continued)
Open TraceTo trace the circumference of a portion of the anatomy and 
calculate its length: 
1. Press Measure.
2.  Press the appropriate Trackball key to select Open trace; a 
trace caliper displays.
NOTE:  For open trace, Area (A) is not displayed in the result 
window.
3.  To position the trace caliper at the start point, move the 
Trackball.
4.  To fix the trace start...

Performing an Exam
2-18 LOGIQ E9 User Guide
Direction 5180302-100 Rev. 1
Circumference and area (spline trace) measurement
To trace the circumference of a portion of the anatomy and 
calculate its area: 
1. Press Measure.
2.  Press the appropriate Trackball key to select Spline Trace; 
a Spline trace caliper displays.
3.  To position the first caliper at the start point, move the 
Trackball.
4.  To fix the trace start point, press Set. The first caliper turns 
yellow. The second caliper appears at the...

Measurement and Analysis
LOGIQ E9 User Guide 2-19
Direction 5180302-100 Rev. 1
Circumference and area (spline trace) measurement (continued)
Edit the spline
trace1. Select Cursor Select. The spline trace changes to green 
and all points appear on the trace as yellow. 
A pick-caliper appears on the center of the image and the 
message “Edit spline trace” displays at the bottom of the 
screen.
NOTE:  The pick-caliper is used to select and move the trace points.
Figure 2-1.  Edit spline trace
NOTE: Pressing...

Performing an Exam
2-20 LOGIQ E9 User Guide
Direction 5180302-100 Rev. 1
IMT Measurement
You can measure the average of the intima media thickness for 
use as the index of arterial sclerosis. 
NOTE:  The IMT measurement is available with linear probes only.
NOTE:  Due to the physical properties of ultrasound imaging, the 
posterior IMT measurement is generally more accurate than the 
anterior IMT measurement.
1.  Before you measure the IMT, add the IMT measurement to 
the Carotid folder via the...

Measurement and Analysis
LOGIQ E9 User Guide 2-21
Direction 5180302-100 Rev. 1
IMT Measurement (continued)
3. Press Measure, then select IMT1, IMT2 or 5mm scale. An 
active caliper displays. 
Figure 2-2. IMT caliper (Example)
4. Use the Trackball to move the caliper and the Ellipse 
control to adjust the angle. Press Set to fix the caliper. 
NOTE:  The interval of the vertical line for IMT1 and IMT2 is 1cm 
and for the 5mm scale is 5mm. 
5.  Measure the thickness of three points for IMT1 and IMT2.
OR...

Performing an Exam
2-22 LOGIQ E9 User Guide
Direction 5180302-100 Rev. 1
IMT Measurement (continued)
6.  After you complete the measurement, the system calculates 
the average automatically. 
Figure 2-3. IMT Measurement 

Measurement and Analysis
LOGIQ E9 User Guide 2-23
Direction 5180302-100 Rev. 1Plaque Score Tool1.  Before you measure, add Plaque Score to the Carotid folder 
at the Utility -> Measure -> Measurement & Analysis screen 
(by selecting 2D Plaque Score under Add Measurement in 
the M&A screen).
Label the parameters you want measured:
•  Distance value (up to 20)
•  Sum (greater or equal to 1.1 mm)
•  Count (greater or equal to 1.1 mm)
•  Maximum value of each area
• Average value
•  Average value of each...

Performing an Exam
2-24 LOGIQ E9 User Guide
Direction 5180302-100 Rev. 1 Plaque Score Tool
(continued)5.  Measure the thickness (up to twenty times) on any place as 
necessary.
Figure 2-5. Plaque Score Example 2
6.  The system displays the measurement result.
Figure 2-6. Plaque Score Example 3
NOTE:  Only calculates the value larger than 1.1mm.
7.  Double click the Set key to finish the measurement. 

Measurement and Analysis
LOGIQ E9 User Guide 2-25
Direction 5180302-100 Rev. 1
Doppler Mode Measurements
Four basic measurements can be made in Doppler Mode.
• Velocity
•  TAMAX and TAMEAN (Manual or Auto Trace)
•  Two Velocities with the Time Interval and Acceleration 
between them
• Time Interval
• Volume Flow
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....

Performing an Exam
2-26 LOGIQ E9 User Guide
Direction 5180302-100 Rev. 1
TAMAX and TAMEAN
Manual TraceThe value measured depends upon the Vol Flow Method preset. 
The two selections available are: Peak (TAMAX) and Mean 
(TAMEAN). 
To do a manual trace of TAMAX or TAMEAN: 
1. Press Measure twice; a trace caliper displays. 
2.  To position the caliper at the trace start point, move the 
Trackball.
3.  To fix the start point, press Set.
4.  To trace the maximum values of the desired portion of the...