Ultrasound machine knobology Copyright © 2010 Academy of Veterinary Imaging Ultrasound machine knobology… In other words, what the heck do all of those knobs.
Download ReportTranscript Ultrasound machine knobology Copyright © 2010 Academy of Veterinary Imaging Ultrasound machine knobology… In other words, what the heck do all of those knobs.
Ultrasound machine knobology
Copyright © 2010 Academy of Veterinary Imaging
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?!?!
GE ultrasound
Image optimization
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Presets, depth, frequency, auto-optimize, focal points, gain/TGC Features
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Archiving, transducers, SRI, compounding, harmonics, 3-D, LOGIQView, Doppler
GE features: Archiving Transducers SRI CrossXBeam Harmonics 3-D LOGIQView % affected
GE ultrasound
Image optimization: Presets Depth Frequency Auto-optimize Focal points Gain/TGC Go to:
In this presentation, click on the Home button as pictured here to return to this page
Image optimization
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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
Presets
• • • •
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
Depth
•
Adjust as needed throughout scan
Optimal
Frequency
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High frequency
•
Better resolution
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Less depth
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Lower frequency
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Lower resolution
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Better for depth
Auto 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.
Focal points
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Improved resolution is seen where the focal points are.
•
Place focal points at the region of interest.
Gain
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Overall gain
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Amplification of received signal
•
TGC
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Time Gain Compensation
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Compensates for beam attenuation (loss of energy as it passes through tissue)
LOGIQ 7
(touch screen)
LOGIQ 5
LOGIQ P5
LOGIQ e
LOGIQ Book
(toggle)
Archiving
• •
‘P’ buttons can be programmed Default settings:
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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
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
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Select the media to eject, then finalize
Some GE transducers
Rectal 8C 12L i739 3S 4C
SRI
•
Speckle Reduction Imaging:
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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
SRI
• •
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
Spatial compounding
• • • • •
CrossXBeam
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= GE’s spatial compounding
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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
CrossXBeam
• •
Perpendicular angle of insonation generates higher signal Images generated with compounding have more angles that are perpendicular to structures CrossXBeam OFF CrossXBeam ON
CrossXBeam
• • • • • • •
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
CrossXBeam: P5
Press X Beam to turn on Press L and R buttons simultaneously to see side-by-side display of CrossXBeam on and CrossXBeam off
CrossXBeam: 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
Harmonics (THI)
Display is from echos of a frequency different from the transmitted frequency (i.e. 2x transmitted frequency)
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Reduced artifact
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Improved axial and lateral resolution
•
Better margin definition and increased contrast
Harmonics (THI)
Press THI or Harmonics button to turn on Press L and R buttons simultaneously to see side-by-side display of harmonics on and harmonics off
3-D
• • • • • •
Volume imaging
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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
3-D: P5
Press 3D to turn on Click arrow to go to images Press Left button to start. Scan anatomy. Press Right button to stop.
3-D: Le
Press F7 to turn on Click arrow to go to images Press Left button to start. Scan anatomy. Press Right button to stop.
3-D
Use set button to alternate hand and rotate tools Drag image to corner
3-D
Use set button to alternate hand and rotate tools Rotate image
3-D
Use set button to alternate hand and rotate tools Slice through
3-D
Use set button to alternate hand and rotate tools Rotate again
3-D
Use set button to alternate hand and rotate tools Slice through another plane
LOGIQView
• • •
Extended field of view Better demonstration of anatomical relationships Ability to measure large structures
LOGIQView: P5
Press LOGIQ View to turn on Press Left button to start, scan anatomy. Press Right button to stop.
LOGIQView: Le
Press F8 View to turn on Press Left button to start, scan anatomy. Press Right button to stop.
LOGIQView
Scan in a straight plane or image will ‘bend’
% affected
•
Measure % of tendon affected by the lesion
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Press Measure button
– – – – – – –
Select % stenosis folder Select % sten (area) Trace around entire tendon Press set Trace around lesion Press set % affected = 100 - %sten