GE Logiq P5 User Manual

							Vascular Measurements
LOGIQ 5 Basic User Manual 11-21
Direction 2300002-100 Rev. 2
Auto Vascular Calculation
Activating Auto
Va s c u l a r
CalculationTo activate Auto Vascular Calculation, select the Auto Calc 
Touch Panel key to select Live (calculations displayed on the 
real-time image), or Freeze (calculations displayed on the frozen 
image).
To deactivate Auto Vascular calculation, select Off.
 Figure 11-7. Auto Calculation Touch Panel key
Setting up Auto
Va s c u l a r
Calculation
Parameters• Selecting Auto Trace
You can select to have a continuous auto trace of the max or 
mean velocities.
•  Select Max or Mean using the Trace Method Touch 
Panel pull-down menu.
• Selecting Trace Detection
Trace Detection lets you specify the peak timeline data used 
for the cardiac cycle identification. Indicate whether cardiac 
cycle detection, and therefore cardiac cycle identification, 
should use peak timeline data above, below, or composite 
(above and below) the baseline. 
•  Select Positive, Negative, or Both to set the peak 
timeline data.
• Modify Calculation
a. Select the Modify Calc Touch Panel key. 
The Modify Calculation menu is displayed. 
b.  Select which measurements and calculations are to be 
displayed in the Auto Vascular calculation window.
You can select the following parameter: PS, ED, MD, 
HR, TAMAX, PI, RI, Accel, PS/ED, ED/PS, AT, Volume 
Flow, PV. 
						

							Vascular
11-22 LOGIQ 5 Basic User Manual
Direction 2300002-100 Rev. 2
Auto Vascular Calculation (continued)
Auto Vascular
Calculation Exam1. Preset the system.
2.  Perform the scan and press Freeze.
3.  Activate Auto Vascular Calculation.
The system performs a calculation automatically as shown 
in Figure 11-8.
 Figure 11-8. Auto Vascular Calculation 
						

							Vascular Measurements
LOGIQ 5 Basic User Manual 11-23
Direction 2300002-100 Rev. 2Auto Vascular
Calculation Exam
(continued)The Auto Vascular calculation is assigned to particular vessel 
measurements.
1. Press Measure to display the Measurement menu.
2.  Select the location of the vessel (Prox, Mid, or Dist) and 
Side (Right or Left).
3.  Select the desired vessel name from the Touch Panel. 
Selected vessel measurements are automatically assigned 
with the Auto Vascular calculation. The results are then 
displayed in the Results Window as shown in Figure 11-9.
 Figure 11-9. Assigned Vessel
NOTE:  When you want to cancel the assignment, you can use the 
Cancel Transfer Touch Panel key. See ‘Cancel Transfer’ for 
more information. 
						

							Vascular
11-24 LOGIQ 5 Basic User Manual
Direction 2300002-100 Rev. 2
Auto Vascular Calculation (continued)
During the course of an exam, the cardiac cycle may be 
indicated between two yellow bars; the peak trace and the mean 
trace may appear in green; calculation indicators appear on the 
spectral trace as a caliper identifier (these vary, depending on 
the selected calculation in the Results Window). 
The right-most, most complete cycle is typically chosen to be the 
selected cardiac cycle. You can select a different cardiac cycle. 
To select a different cardiac cycle:
• Use the Cycle Select control to cycle to a different cardiac 
cycle.
•  Move through CINE memory with the Trackball until the 
desired cardiac cycle is selected by the system.
NOTE:  You need several good cycles in front of the new cardiac 
cycle for this to be successful. Oftentimes, this is 
problematic near a freeze bar.
To move the systole or diastole position:
• Use the Cursor Select control to move the start systole 
position or the end diastole position.. 
						

							Vascular Measurements
LOGIQ 5 Basic User Manual 11-25
Direction 2300002-100 Rev. 2
Manual Vascular Calculation
You can perform the following calculations manually when Auto 
Doppler Calculation is not activated.
1. Press Measure.
If necessary, you can select another Exam Calc and then 
select parameters from Modify Calculation.
2.  Select the location of the vessel (Prox, Mid, or Dist) and 
Side (Right or Left).
3.  Select the desired vessel folder.
The Measurement menu is displayed.
 Figure 11-10. Measurement Menu Example
4.  Make the required measurements according to the system, 
or select your preferred measurements. 
						

							Vascular
11-26 LOGIQ 5 Basic User Manual
Direction 2300002-100 Rev. 2
Acceleration
1. Select Accel. 
The system displays an active caliper with vertical and 
horizontal dotted lines.
2.  To position the caliper at peak systole, 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, move the 
Trackball.
5.  To complete the measurement, press Set.
The system displays the peak systole, end diastole, 
acceleration time, and acceleration in the Results Window. 
Acceleration Time (AT)
1. Select AT. 
The system displays an active caliper and a vertical dotted 
line. 
2.  To position the caliper at the start point, 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 end point, move the Trackball.
5.  To complete the measurement, press Set.
The system displays the acceleration time in the Results 
Window. 
						

							Vascular Measurements
LOGIQ 5 Basic User Manual 11-27
Direction 2300002-100 Rev. 2
End Diastole (ED), Mid Diastole (MD) or Peak Systole (PS),
To calculate the end diastole, mid diastole or peak systole:
1. Select ED, MD or PS. 
The system displays an active caliper with vertical and 
horizontal dotted lines.
2.  To position the caliper at the measurement point, move the 
Trackball.
3.  To complete the measurement, press Set.
The system displays the end diastole, mid diastole or peak 
systole in the Results Window. 
ED/PS or PS/ED Ratio
To calculate the End Diastole/Peak Systole ratio or Peak 
Systole/End Diastole ratio:
1. Select ED/PS or PS/ED. 
The system displays an active caliper with vertical and 
horizontal dotted lines.
2.  To position the caliper at end diastole (ED) or peak systole 
(PS), 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 peak systole (PS) or end 
diastole (ED), move the Trackball.
5.  To complete the measurement, press Set.
The system displays the end diastole, peak systole, and ED/
PS or PS/ED ratio in the Results Window.  
						

							Vascular
11-28 LOGIQ 5 Basic User Manual
Direction 2300002-100 Rev. 2
Heart Rate
To calculate the heart rate:
1. Select Heart Rate. 
The system displays an active caliper and a vertical dotted 
line. 
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 11-11. Two Heart Beat Reference
5.  To complete the measurement and transfer the calculation 
to the worksheet, press Set. 
						

							Vascular Measurements
LOGIQ 5 Basic User Manual 11-29
Direction 2300002-100 Rev. 2
Pulsatility Index (PI)
To perform a Manual Trace:
1. Select PI. 
The system displays a trace caliper and a vertical dotted 
line.
2.  To position the caliper at the beginning of the waveform 
(PS), move the Trackball.
3.  To fix the start point, press Set.
The system displays a second active caliper.
4.  To trace the waveform from PS to ED, move the Trackball.
5.  To complete the measurement, press Set.
The system displays peak systole, mid diastole, end 
diastole, TAMAX, and the PI in the Results Window. 
To perform a Auto Trace:
1.  The system displays a trace cursor.
2.  Use the Trackball to move the cursor to desired point and 
press Set to fix.
3.  The system displays a value of PS, ED, MD, TAMAX and PI 
in the Result Window.
Resistive Index (RI)
1. 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 PS
, ED, and RI in the Results Window.  
						

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11-30 LOGIQ 5 Basic User Manual
Direction 2300002-100 Rev. 2
TA M A X
To perform a Manual Trace:
1. 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 PS,
 ED, and RI in the Results Window. 
Performing an
Auto Trace1.  The system displays a trace cursor.
2. Use the Trackball to move the cursor to desired point and 
press Set.
3.  The peak velocity envelope is auto traced and the system 
displays a value of VTI, Time and TAMAX in the Result 
Window.
Edit TraceRegarding Auto trace functionality, the user can just move the 
cursors to the desired cardiac cycle and position in PS and 
ED.The system has ability for manual correction of Auto trace.
To edit trace:
1. Adjust the Ellipse rotary knob clockwise or move the 
Trackball over the incorrect portion of the measurement.
2.  Going back to the point where trace is good.
3. Press Set. Then the system continues the trace to the end 
of the waveform.