GE Logiq P5 User Manual

							Optimizing Spectral Doppler
LOGIQ 5 Basic User Manual 5-67
Direction 2300002-100 Rev. 2
Trace Sensitivity
DescriptionAdjust the trace to follow the waveform for signal strength.
AdjustingPress the left or right arrow key to select value.
Va l u e sFrom 0 to 40. 
BenefitsIf the signal is very faint, changing the Trace Sensitivity will allow 
the system to lock onto that signal strength. 
PW/CF Ratio
PW/CF RatioThe PW/CF Ratio control adjusts the ratio between Spectral 
Doppler and Color Flow. 
AdjustingPress PW/CF Ratio to adjust. 
Va l u e s1:1, 1:2, and 1:4. 
Duplex
DescriptionDuplex On:  simultaneous B-Mode + PW Mode. 
Duplex Off: toggle live B-Mode + PW Mode via B Pause. 
AdjustingPress Duplex. 
Va l u e sOn/Off. 
BenefitsAllows you to have both B-Mode and PW Doppler Mode active 
at the same time.  
						

							Optimizing the Image
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Trace Direction
DescriptionSpecifies trace direction. 
AdjustingPress Trace Direction. 
Va l u e sAbove, Below, or Both. 
BenefitsYou can select where on the waveform to perform the trace, 
above, below, or both. 
Full Timeline
DescriptionExpands display to full timeline display. 
AdjustingPress Full Timeline. 
Va l u e sOn/Off. 
BenefitsAllows you to view just the timeline, to see more detail. 
Display Format
DescriptionChanges the horizontal/vertical layout between B-Mode and M-
Mode, or timeline only. 
AdjustingPress Display Format. 
Va l u e sVertical 1/3, 1/2, or 2/3 B-Mode, Horizontal 1/4 or 1/2 B-Mode, or 
Timeline Only. 
BenefitsYou can select how to have your Doppler timeline and anatomy 
displayed. 
Time Resolution
DescriptionAdjusts image appearance so that if you select a lower setting, 
the image appears smoother; if you select a higher setting, the 
image appears sharper. 
AdjustingPress Time Resolution. 
Va l u e s1-3
BenefitsTime Resolution = 3 (high) smooths the Timeline; Time 
Resolution =1 (low) increases the time resolution (image not as 
smooth).  
						

							Optimizing Spectral Doppler
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Direction 2300002-100 Rev. 2
Modify Auto Calcs
DescriptionActivates the menu to select which calculations are 
automatically calculated. 
AdjustingPress Modify Auto Calcs to activate Modify Auto Calcs Touch 
Panel. 
BenefitsProvides flexibility.  
						

							Optimizing the Image
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Continuous Wave Doppler (CWD)
Allows examination of blood flow data all along the Doppler 
Mode cursor rather than from any specific depth. Gather 
samples along the entire Doppler beam for rapid scanning of the 
heart. Range gated CW allows information to be gathered at 
higher velocities.
There are two CW Doppler operating modes: Steerable and 
Non-Imaging.
Steerable
Allows viewing of the B-Mode image to position the Doppler 
cursor to the area of interest while viewing the Doppler spectrum 
(shown below in the B-Mode image) and listening to the Doppler 
Audio signal.
Works with Sector probes.
 Figure 5-19. CWD Screen 
						

							Optimizing Spectral Doppler
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Direction 2300002-100 Rev. 2
Non-Imaging
Provides only Doppler Spectrum and Audio for ascending/
descending aortic arch, other hard-to-get-to spaces or higher 
velocities.
Requires a single CWD probe and probe adapter.
Works with the P2D and P6D probes.
 Figure 5-20. Non Imaging CWD Screen 
						

							Optimizing the Image
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Activating CW Doppler
To activate CW Doppler Mode, press CW. 
The Doppler spectrum displays along with the B-Mode image. 
(Steerable CW Doppler, NOT Non-Imaging CW Doppler). The 
cursor changes to a Doppler cursor. 
 Figure 5-21. CWD Mode Touch Panel, Page 1
 Figure 5-22. CWD Mode Touch Panel, Page 2 
						

							Optimizing Spectral Doppler
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Direction 2300002-100 Rev. 2
Exiting CW Doppler
CW Doppler Mode, press CW.  
						

							Optimizing the Image
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Using 3D
Overview
There are two 3D Packages: 
WARNINGDO NOT scan any pacemaker patient using the sensor device. 
The magnetic fields emitted from the device may interfere with 
the pacemaker operation. 
Table 5-4: 3D Package Options
3D TypeDescription
Sensor/No 
SensorAvailable 
Ta b s
Easy 3D Designed for 
rendering B 
Mode images, 
e.g., Baby Face 
scans. No sensor 3D Acquisition, 
Easy 3D, Movie
Advanced 3D Designed for 
rendering B 
Mode and Color 
Flow Mode 
images, e.g., 
vessel trees. No sensor 3D Acquisition, 
Easy 3D, 
Advanced 3D, 
Movie 
						

							Using 3D
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Direction 2300002-100 Rev. 2
3D Acquisition
Acquiring a 3D Scan
To acquire a 3D scan, 
1.  Optimize the B-Mode image. Ensure even gel coverage.
2.  Press the 3D control panel key. Two screens appear. 
NOTE:  Set appropriate values for Acq Mode and Scan Plane. Also, 
set the scan distance before scanning. 
3.  To start acquiring the image, press ‘L’ (the left split screen 
key). 
4.  To perform a parallel scan, scan evenly. To perform a sweep 
(fan) scan, rock the probe once. Note the distance of the 
scan. 
5.  The 3D volume of interest (VOI) is dynamically assembled 
on the right side of the screen.
NOTE:  If the image stops before you’re done scanning, start 
acquiring the 3D volume of interest again. 
6.  To complete the 3D scan, press ‘R’ (the right split screen 
key). 
NOTE:  You can also press Freeze, but then you need to also press 
the 3D  key to obtain the final render. 
3D Notes
Adjust the 3D dataset brightness with B-Mode or Color Flow 
Mode Gain. 
Use Colorize to change the color of the active dataset. 
Use Zoom to increase the zoom factor of the active dataset.  
						

							Optimizing the Image
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Manipulating the Volume of Interest
Imagine you are able to manipulate the 3D volume of interest 
(VOI) in your hand. The 3D VOI is a tangible anatomical object 
that you can see and manipulate easily using the Trackball and 
Set control panel keys. 
Practice positioning the pointer at different places within the 3D 
VOI. Highlight different colors (white, red, yellow, or green). 
Press Set to select a VOI for manipulation. Use the hand to 
manipulate the 3D VOI. 
Rotating the 3D
VOI Left/Right or
Forward/BackwardYou can rotate it left to right or right to left. You can rotate it 
forward/backward. Press right Set key when the white pointer 
finger is positioned on the white box. Move the closed white 
hand to manipulate the 3D VOI. 
 Figure 5-23. Manipulating the 3D Volume of Interest (White Hand)