GE LOGIQ 7, Basic User Manual

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Optimizing the Image
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76 LOGIQ 7 Online Help
Direction 2392536-100 Rev. 1
Invert (Color Invert)
Description Lets you view blood flow from a different perspective, e.g., red
away (negative velocities) and blue toward (positive velocities).
You can invert a real-time or frozen image.
NOTE: Invert reverses the color map, NOT the color PRF.
Adjusting To reverse the color flow, press Invert (Color Invert) .
In Triplex, both Color Flow and Doppler Mode velocity scales
are inverted.
Values Invert and non-Invert. Values vary by probe and application.
Invert values are returned to the factory or user preset value
when you change the following: Probe, Exam Category, Exam
Calcs, or New Patient.
Benefits Allows you to view blood flow according to your personal
preference.
Baseline
Description Changes the Color Flow or Doppler spectrum baseline to
accommodate higher velocity blood flow. Minimizes aliasing by
displaying a greater range of forward flow with respect to
reverse flow, or vice versa.
Baseline adjusts the alias point. The default baseline is at the
midpoint of the color display and at the midpoint of the color bar
reference display.
Adjusting To adjust the baseline, adjust Baseline left/right, as necessary.
Values Zero velocity follows the baseline. The total PRF range remains
the same. Values vary by probe and application.
Baseline values are returned to the factory or user preset value
when you change the following: Probe, Exam Category, Exam
Calcs, or New Patient.
Benefits Unwraps the alias during color flow imaging. Higher velocities
can be displayed without reversal of colors.