GE LOGIQ V3, Basic Service Manual

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Functional checks
LOGIQ V3/V5/V5 Expert – Basic Service Manual 4-31
5726264-100 English Rev.8
4-3-20 Adjust the Color Mode controls
• Adjust the Active mode gain to set the gain in the color flow
area.
Adjust Scale to the highest setting that provides adequate
flow detection.
NOTE: The scale value may affect FPS, Low Velocity Reject, and
Sample Volume.
Adjust Wall Filter to remove low velocity blood flow and
tissue movement that reduces image quality.
Adjust
Sample volume (SV) to a low setting for better flow
resolution, or a higher setting to more easily locate disturbed
flows.
Adjust
Frequency to optimize the color flow display. Higher
settings improve resolution. Lower settings improve depth
penetration and sensitivity. This does not affect the
frequency used for 2D and M-Mode.
NOTE: Frequency setting may affect FPS, SV and Low Velocity
Reject.
Adjust PowerOutput to obtain an acceptable image using
the lowest setting possible.
NOTE: The Power setting affects all other operating modes.
Adjust the following settings to further optimize display of the
image:
• Use Invert to reverse the color assignments in the color flow
area of the display.
Use Threshold to emphasize either the color flow overlay,
or the underlying grey scale tissue detail.
Use
Baseline to emphasize flow either toward or away from
the probe.
Use
Spatial Filter to reduce noise in the color flow area.
Spatial Filter smooths the image by averaging collected data
along the same horizontal line. An increase of the spatial
filter will reduce noise, but this will also reduce the lateral
resolution.