BK Medical bkSpecto, Advanced User'S Manual

Page: 79 / 164

bkSpecto Advanced User Guide (16-01642-01) Imaging Modes 79
To move the Doppler gate:
•
Drag the Doppler gate using the trackpad.
The sample volume line moves along with the gate.
To resize the Doppler gate:
•
Touch and slide SV size .
To adjust the angle:
•
Touch and slide Angle Correct .
In Doppler mode, this control will also be available when measuring.
Independent D-Mode/C-Mode Steering
Independent steering of PW Doppler and CFM is possible using the Sync Steer
button. To enable independent steering, tap Sync Steer to deactivate it. Then use the
Steer scale button to change the angle of the Doppler line.
NOTE
: This feature is only available for certain transducers and exam types.
Doppler Trace (Automatic Curve Tracing)
The system can automatically calculate and display a curve that traces the mean or
peak values of the Doppler spectrum. See “Doppler Measurements” on page 85 for
a description of the curves. You can also choose to have both the peak and mean
curves displayed.
To change which curve is displayed or to turn off the display:
•
Tap Trace to select Off , Peak , Mean+Peak , or Mean .
To measure higher flow speeds (high range setting) in a sample volume placed deep
in the tissue, HPRF (high PRF) is automatically used. When HPRF is active, the
Doppler line shows the actual sample volume, and false sample volumes (shown
dotted). See Fig 7-13 on page 78.
The false sample volumes should always be placed outside a vessel.
Sweep Speed
You can adjust the sweep speed to change the number of cycles of the spectrum
displayed on the full time axis. The available values range from 2 (slowest) to 12
(fastest).
To select the sweep speed:
•
Touch and slide Sweep Speed and select the required value.
The time axis is updated.
M-Mode
To turn M-mode on:
•
Tap M .