GE T8, Basic Service Manual

Page: 182 / 349

General Procedures and Functional Checks
4-24 Vivid T9/Vivid T8 – Basic Service Manual
5795591-100 English Rev. 3
4-3-18 Adjust the Color 2D 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 Low Velocity Reject to remove low velocity blood
flow and tissue movement that reduces image quality.
Adjust
Variance to detect flow disturbances.
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 Power 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 Tissue priority 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
Radial and Lateral Averaging to reduce noise in the
color flow area. Radial and Lateral Averaging smooths the
image by averaging collected data along the same
horizontal line. An increase of the lateral averaging will
reduce noise, but this will also reduce the lateral resolution.