Download - Knobology 01 2010 (2)
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Ultrasound machine Ultrasound machine knobologyknobology
Copyright © 2010 Academy of Veterinary Imaging
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Ultrasound machine knobology…Ultrasound machine knobology…
In other words, what the heck do all of those knobs and buttons do, and how can adjusting
them affect image quality?!?!
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• Image optimization– Presets, depth, frequency, auto-optimize, focal
points, gain/TGC
• Features– Archiving, transducers, SRI, compounding,
harmonics, 3-D, LOGIQView, Doppler
GE ultrasoundGE ultrasound
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GE ultrasoundGE ultrasound
LOGIQ 7
LOGIQ Book
Go to:Image optimization:
Presets
Depth
Frequency
Auto-optimize
Focal points
Gain/TGC
LOGIQ e
LOGIQ 5
Archiving
Transducers
SRI
CrossXBeam
Harmonics
3-D
LOGIQView
% affected
GE features:
LOGIQ P5
In this presentation, click on the Home button as pictured here to return to this page
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Image optimizationImage optimization
• Image quality is comprised of many things• During an ultrasound exam, the ultrasound machine settings should be changed as needed to optimize image quality• Understanding just a few of the knobs can accomplish this for most scans
L7
L5
LB
Le
P5
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PresetsPresets
• Settings can be saved as presets• Viewed in Application or Preset
screen• Different presets for different
transducers/structures/patient species/sizes
• The more ‘complicated’ machine settings are saved in presets, so these do not need to be adjusted during every scan
L7
L5
LB
P5
Le
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DepthDepth
• Adjust as needed throughout scan
Optimal
L7
L5
LB
P5
Le
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FrequencyFrequency
• High frequency• Better resolution• Less depth
• Lower frequency• Lower resolution • Better for depth
L7
L5
LB
P5
Le
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Auto optimizeAuto optimize
• ‘Personal preference’ button.• Adds more contrast…Whites are
whiter, blacks are blacker• Try on or off. Chose the setting
that looks better to you. • Auto optimize must be deselected
then reselected for every new structure imaged.
L7
L5
LB
P5
Le
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Focal pointsFocal points
• Improved resolution is seen where the focal points are.• Place focal points at the region of interest.
L7
L5
LB
P5
Le
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GainGain
• Overall gain– Amplification of received signal
• TGC– Time Gain Compensation– Compensates for beam
attenuation (loss of energy as it passes through tissue)
L7
L5
LB
P5
Le
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LOGIQ 7LOGIQ 7
TGC
Auto optimize
Gain
Depth
Frequency
Focal points
(touch screen)
L5
LB
Le
P5
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LOGIQ 5LOGIQ 5
TGCAuto
optimize
Gain
Depth
Focal points
Frequency
L7
LB
Le
P5
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LOGIQ P5LOGIQ P5
Auto optimizeGain
DepthTGC
Focal points
Frequency
L7
L5
LB
Le
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LOGIQ eLOGIQ e
Auto optimize
Gain
Depth
TGC
Focal points
Frequency
L7
L5
LB
P5
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LOGIQ BookLOGIQ Book
Auto optimizeGain
Depth
TGC
Focal points
Frequency
(toggle)
L7
L5
Le
P5
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Archiving Archiving
• ‘P’ buttons can be programmed
• Default settings:– P1: Saves as raw dicom clip or
still image (image appearance, M-mode, 3-D can be done on a raw dicom clip, but it is a very large file, thus too large to send)
– P2: Print on the thermal printer
– P3: Save as dicom
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Archiving Archiving
• Images can be transferred to a CD or USB flash drive.
• Depending on GE model, media must be formatted first– Press Utilities button – Select Connectivity, then removable media
• To eject media after saving images, press F3– Select the media to eject, then finalize
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Some GE transducersSome GE transducers
8C 12L
4C
3S
Rectal
i739
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SRISRI
• Speckle Reduction Imaging:– Improved contrast resolution– Improved overall clarity– Smoothes regions where no feature or edges
appear– Maintains or enhances edges and borders– Does not eliminate any information– Increased Signal-to-Noise ratio
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SRISRI
• Always is on in the LOGIQ e• Can adjust to have different levels in the
LOGIQ 7 and LOGIQ P5– Level is set within the preset (Application)
settings
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Spatial compoundingSpatial compounding
• CrossXBeam – = GE’s spatial compounding– Available on the LOGIQ e and LOGIQ P5
• Interrogates tissue at multiple angles• Introduces new tissue info• Averages out speckle• SRI and CrossXBeam together can have
complimentary and additive effects
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CrossXBeamCrossXBeam
• Perpendicular angle of insonation generates higher signal
• Images generated with compounding have more angles that are perpendicular to structures
CrossXBeam OFF CrossXBeam ON
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CrossXBeamCrossXBeam
• Improved border definition• Improved contrast resolution• Reduced angle dependence • Reduced speckle and noise• Increased visualization of biopsy needles• Can reduce helpful artifact • Can reduce frame rate
LOGIQ eLOGIQ P5
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CrossXBeam: P5CrossXBeam: P5
Press L and R buttons simultaneously to see side-by-side display of CrossXBeam on and CrossXBeam off
Press X Beam to turn on
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CrossXBeam: LeCrossXBeam: Le
F9 or ‘Comp’ to turn on
Press L and R buttons simultaneously to see side-by-side display of CrossXBeam on and CrossXBeam off
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Harmonics (THI)Harmonics (THI)
Display is from echos of a frequency different from the transmitted frequency (i.e. 2x transmitted frequency)
•Reduced artifact
•Improved axial and lateral resolution
•Better margin definition and increased contrast
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Harmonics (THI)Harmonics (THI)
Press L and R buttons simultaneously to see side-by-side display of harmonics on and harmonics off
Press THI or Harmonics button to turn on
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3-D3-D
• Volume imaging– Volume vs. area affected can be assessed
• Appears more ‘life-like’• Infinite viewing planes• May approximate CT or MRI imaging• Scan parallel* or sweep (fan)• Angle of imaging less operator dependent
LOGIQ eLOGIQ P5
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3-D: P53-D: P5
Press Left button to start. Scan anatomy. Press Right button to stop.
Press 3D to turn on
Click arrow to go to images
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3-D: Le3-D: Le
Press F7 to turn on
Press Left button to start. Scan anatomy. Press Right button to stop.
Click arrow to go to images
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3-D3-DUse set button to alternate
hand and rotate tools
Drag image to corner
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3-D3-D
Rotate image
Use set button to alternate hand and rotate tools
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3-D3-D
Slice through
Use set button to alternate hand and rotate tools
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3-D3-D
Rotate again
Use set button to alternate hand and rotate tools
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3-D3-D
Slice through another plane
Use set button to alternate hand and rotate tools
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LOGIQViewLOGIQView
• Extended field of view• Better demonstration of anatomical
relationships• Ability to measure large structures
LOGIQ e
LOGIQ P5
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LOGIQView: P5LOGIQView: P5
Press LOGIQ View to turn on
Press Left button to start, scan anatomy. Press Right button to stop.
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LOGIQView: LeLOGIQView: Le
Press F8 View to turn on
Press Left button to start, scan anatomy. Press Right button to stop.
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LOGIQViewLOGIQView
Scan in a straight plane or image will ‘bend’
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% affected% affected
• Measure % of tendon affected by the lesion– Press Measure button– Select % stenosis folder– Select % sten (area)– Trace around entire tendon– Press set– Trace around lesion– Press set– % affected = 100 - %sten