11.2.9
Video Invert
This function has the effect of changing the background of the spectral display.
Instructions:
1. Open the menu, and use the trackball to select Video Invert.
2.
Rotate
to enable or disable the function.
11.2.10
2D Refresh
2D refresh is used to synchronously display two real time scans in the 2D and the PW modes.
Instructions:
1. Open the menu, and use the trackball to select 2D Refresh.
2. Rotate
to enable or disable the function.
11.2.11
Baseline
Baseline represents the position of zero velocity or frequency. The velocity range in one
direction can be increased or decreased by adjusting the baseline.
Baseline is used to unwraps the alias during color flow imaging, and display higher velocities
without reversal of colors.
Instructions:
Flip
to move the baseline up or down.
NOTE:
If t he baseline is adjusted incorrectly, overlapping phenom ena may be produced on the PW
trace.
11.3 Other PW Mode Operations
11.3.1
Frozen Mode
Press
in a real time PW scan to start the spectral Doppler cine mode.
Press
again to resume the real time scan.