Sonoscape SSI-5500, Руководство пользователя

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SSI-6000/SSI-5800/SSI-5500/SSI-5500BW
Digital Color Doppler Ultrasound System
Remarks:
• The current PRF value is display at the Spectral Doppler Image Info area (
PRF ).
• The system automatically adjusts the Wall Filter setting upon changing the PRF
value.
10.2.4 Wall Filter (WF)
Wall Filter intends to eliminate the low frequency noise generated by
movements of blood vessel walls.
Flip the
FILTER
switch up/down to increase/decrease the Wall Filter value.
Remarks:
• The current Wall Filter value is displayed at the Color Image Info area (
WF
).
• The Wall Filter is adjustable within a range which depends on the current PRF
value.
10.2.5 Spectral Doppler Gain
It is possible to change the PW/CW gain only when the PW/CW spectral
display is active.
The Doppler gain controls the overall brightness of the spectral display.
When the spectral Doppler display is active, turn the D GAIN knob to adjust the
Doppler gain.
Remark:
• The spectral Doppler gain value is shown at the Spectral Doppler Image Info
area (the
GN
).
10.2.6 Steer Angle
STEER ANGLE
Use this function to adjust the spectral Doppler cursor for linear array probes
2
.
• Use the trackball to highlight the item STEER ANGLE .
• Press the LEFT/RIGHT
keys to change the angle of the spectral Doppler cursor.
10.2.7 Flow Invert
FLOW INVERT
You can use this function in either PW or CW mode to invert the spectral display
in relation to the flow direction. The displayed spectrum is inverted around the
baseline.
When Flow Invert is turned on,
Invert
indicator appears on top right of the spec-
tral display.
2
This function is hidden for those other than linear array probes.
P/N: 4701-0061-01B
10-6