GE Logiq 9 User Manual

							Optimizing the Image
LOGIQ E9 User Guide 2-7
Direction 5180302-100 Rev. 1
Sample Volume 
Length (SV Length)Yes Sizes the sample volume gate.
Packet Size Yes Controls the number of samples gathered for a single color flow 
vector. 
Map Compress No When you increase the value, high velocity elements in the map are 
compressed so that the map darkens. When you decrease the 
value, low velocity elements in the map are compressed so that the 
map lightens. The effect is visible in the color bar. 
CF/PDI Vertical Size No You can set the default CF/PDI ROI vertical size.
CF/PDI Width No You can set the default CF/PDI ROI width.
CF/PDI Center 
DepthNo You can set the default CF/PDI center depth. 
CF/PDI Frequency 
(MHz)No You can set the default CF/PDI Frequency (MHz).
CF/PDI Auto 
FrequencyNo You can set the default CF/PDI Auto Frequency.
CF/PDI Focus Depth 
(%)No You can set the default CF/PDI center depth. 
Power Doppler 
Imaging (PDI)No Power Doppler Imaging (PDI) is a color flow mapping technique 
used to map the strength of the Doppler signal coming from the flow 
rather than the frequency shift of the signal. Using this technique, the 
ultrasound system plots color flow based on the number of reflectors 
that are moving, regardless of their velocity. PDI does not map 
velocity, therefore it is not subject to aliasing. 
Table 2-3:  Color Flow Mode Controls (Continued)
Control
Possible
BioeffectDescription/
Benefit 
						

							Performing an Exam
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Direction 5180302-100 Rev. 1
Doppler Mode Controls
Table 2-4:  Doppler Mode Controls
Control
Possible
BioeffectDescription/
Benefit
Update Yes Toggles between simultaneous and update presentation while 
viewing the timeline. 
SV Length 
(Trackball)Yes Moves the sample volume gate on the B-Modes Doppler Mode 
cursor. The gate is positioned over a specific position within the 
vessel. 
Doppler sample 
volume length (SV 
Length)Yes Sizes the sample volume gate.
Scale (Velocity 
Scale)Yes Adjusts the velocity scale to accommodate faster/slower blood flow 
velocities. Velocity scale determines pulse repetition frequency.
If the sample volume gate range exceeds single gate Scale 
capability, the system automatically switches to high PRF mode. 
Multiple gates appear, and HPRF is indicated on the display. 
Angle Correct No Estimates the flow velocity in a direction at an angle to the Doppler 
vector by computing the angle between the Doppler vector and the 
flow to be measured. 
NOTE: When the Doppler Mode Cursor and angle correct indicator 
are aligned (the angle is O), you cannot see the angle correct 
indicator.
Quick Angle No Quickly adjusts the angle by 60 degrees. 
Wall Filter No Insulates the Doppler signal from excessive noise caused from 
vessel movement. 
Baseline No Adjusts the baseline to accommodate faster or slower blood flows to 
eliminate aliasing. 
Mode Cursor No Displays the Doppler Mode cursor on the B-Mode image. 
Steer and Fine Steer Yes You can slant the ROI of the Color Flow linear image left or right to 
get more information without moving the probe. The angle steer 
function only applies to linear probes.
Volume No Controls audio output.
Invert No Vertically inverts the spectral trace without affecting the baseline 
position. 
Dynamic Range 
(Compression)No Dynamic range controls how echo intensities are converted to 
shades of gray, thereby increasing the range of contrast you can 
adjust. 
Trace Method 
(Spectral Trace)No Traces the average mean and peak velocities in realtime or frozen 
images.
Cycles to Average No The average value over a number of cycles (from 1-5).
Trace Sensitivity No Adjust the trace to follow the waveform for signal strength. 
						

							Optimizing the Image
LOGIQ E9 User Guide 2-9
Direction 5180302-100 Rev. 1
Trace Direction No Specifies trace direction. 
Cursor Moving No Cursor Moving lets you ‘walk’ Doppler through a vessel while the 
Doppler gate is moving. 
Display Format No Changes the horizontal/vertical layout between B-Mode and M-
Mode, or timeline only. 
Modify Auto Calcs No Activates the menu to select which calculations are automatically 
calculated. 
Auto  Calcs No Activates the calculation automatically which you select in the Modify 
Auto Calculation when the system is in a state of freeze or live. 
Table 2-4:  Doppler Mode Controls (Continued)
Control
Possible
BioeffectDescription/
Benefit 
						

							Performing an Exam
2-10 LOGIQ E9 User Guide
Direction 5180302-100 Rev. 1
Other Controls
Zoom
Write zooming an image changes the frame rate which tends to 
change thermal indices. The position of the focal zones may 
also change which may cause the peak intensity to occur at a 
different location in the acoustic field. As a result, the MI (TI) 
may change.
To zoom an image, adjust Zoom. A reference image appears in 
the upper, left-hand section of the display. 
To exit zoom, adjust Zoom until the reference zoom image is 
removed or press B-Mode. 
Freezing an image
To freeze an image, 
1. Press Freeze. The Freeze key backlight turns green. 
If you are in a mixed mode, both screen formats stop 
immediately. Deactivating Freeze restarts both modes and 
places a black bar on the trace to indicate the time discontinuity. 
To reactivate the image, 
1. Press Freeze again. 
NOTE:  Deactivating Freeze erases all measurements and calculations 
from the display (but not from the worksheet). 
 Use the Trackball to start CINE after pressing Freeze. 
Activating CINE
To activate CINE,
1. Press Freeze.
2.  Move the Trackball.
Acoustic
Output
HazardObserve the output display for possible effects.  
						

							Optimizing the Image
LOGIQ E9 User Guide 2-11
Direction 5180302-100 Rev. 1
Body Patterns
To activate body patterns, press the Body Pattern/Ellipse 
control. A maximum of 6 body pattern packages are displayed 
on the Touch Panel according to exam category and preset. 
Select the desired body pattern on the Touch Panel.  The 
selected body pattern is displayed on the monitor.
Press the Move Pattern control on the Touch Panel to 
reposition the body pattern with the Trackball and Set controls.
A probe mark is associated with the body patterns and illustrates 
the probe position on the body pattern.  This marker can be 
placed with the Trackball and rotated with the Ellipse control.
The probe mark type is selectable by rotating the Probe Type 
control on the Touch Panel. There are different choices available 
with one being a blank selection.
To select the active side in dual B-Mode, use the Active Side 
rotary control at the bottom of the Touch Panel.
Press the Body Pattern/Ellipse control to erase the body 
pattern. The pattern is erased and the system exits the body 
pattern mode.
Press Set on the keyboard or Scan on the Touch Panel to exit 
without erasing the body pattern. 
						

							Performing an Exam
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Direction 5180302-100 Rev. 1
Annotating an Image
Pressing the Comment key or any keys on the alphanumeric 
keyboard initiates the comment mode. This assigns the trackball 
function to controlling the cursor and displays the comment 
library on the Touch Panel menu.
In comment mode, text can be added by using the comment 
library or by typing from the alphanumeric keyboard.
After activating the comment mode, a vertical bar type cursor 
appears on the screen. Use the Trackball to move the cursor.
To delete comments by character, press the Backspace key.
To delete all comments and arrow marks, press the Clear key 
twice immediately after entering the comment mode. 
To move by words or by text group, press the Tab key.
Arrow pointers can be used by activating the F2 (Arrow) key on 
the keyboard. When the pointer comes up, it is a GREEN color, 
indicating it is active and can be moved. 
						

							Measurement and Analysis
LOGIQ E9 User Guide 2-13
Direction 5180302-100 Rev. 1
Measurement and Analysis
B-Mode Measurements
Two basic measurements can be made in B-Mode.
• Distance
•  Circumference and Area
• Ellipse Method
• Trace Method
• Spline Method
NOTE:  The following instructions assume that you first scan the 
patient and then press Freeze. 
						

							Performing an Exam
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Direction 5180302-100 Rev. 1
Distance measurement
To make a distance measurement:
1. Press Measure once; an active caliper displays.
2.  To position the active caliper at the start point, move the 
Trackball.
3.  To fix the start point, press Set.
The system fixes the first caliper and displays a second 
active caliper.
4.  To position the second active caliper at the end point, move 
the Trackball.
A dotted line connects the measurement points, if preset 
accordingly.
5.  To complete the measurement, press Set.
The system displays the distance value in the Results 
Window.
The following hints can help you to perform distance 
measurements: 
HINTS• Before you complete a measurement:
•  To toggle between active calipers, press Measure.
•  To erase the second caliper and the current data 
measured and start the measurement again, press 
Clear once.
• After
 you complete the measurement:
•  To rotate through and activate previously fixed calipers, 
adjust Cursor Select.
•  To erase all data that has been measured to this point, 
but not data entered onto worksheets, press Clear. 
						

							Measurement and Analysis
LOGIQ E9 User Guide 2-15
Direction 5180302-100 Rev. 1
Circumference and area (ellipse) measurement
You can use an ellipse to measure circumference and area. To 
measure with an ellipse:
1. Press Measure once; an active caliper displays.
2.  To position the active caliper, move the Trackball.
3.  To fix the start point, press Set. The system fixes the first 
caliper and displays a second active caliper.
4.  To position the second caliper, move the Trackball.
5. Adjust the Ellipse control; an ellipse with an initial circle 
shape displays.
6.  To position the ellipse and to size the measured axes (move 
the calipers), move the Trackball.
7.  To increase the size, adjust the Ellipse control in a 
clockwise direction. To decrease the size, adjust the Ellipse 
control in a counterclockwise direction.
8.  To toggle between active calipers, press the appropriate 
Trackball key.
9.  To complete the measurement, press Set. The system 
displays the circumference and area in the Results Window.
HINTSBefore you complete the ellipse measurement:
•  To erase the ellipse and the current data measured, press 
Clear once. The original caliper is displayed to restart the 
measurement.
•  To exit the measurement function without completing the 
measurement, press Clear a second time. 
						

							Performing an Exam
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Direction 5180302-100 Rev. 1
Circumference and area (trace) measurement
Tr a c eTo trace the circumference of a portion of the anatomy and 
calculate its area: 
1. Press Measure.
2. Press the appropriate Trackball key to select Trace; a trace 
caliper displays.
3.  To position the trace caliper at the start point, move the 
Trackball.
4.  To fix the trace start point, press Set. The trace caliper 
changes to an active caliper. 
5.  To trace the measurement area, move the Trackball around 
the anatomy. A dotted line shows the traced area.
6.  To complete the measurement, press Set. The system 
displays the circumference and the area in the Results 
Window.