MediSono P11 EXP, Руководство пользователя

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P11 EXP
Portable Digital Color Doppler Ultrasound System
10-4
UPDATE
MENU
F2
• Press the
size.
key, the gate position is fixed. Move the trackball to change the gate
✖
Remark:
•
Adjusting the gate position and size temporarily pause the PW spectral
display if it is active (updating).
10.2.2 Activation of PW Spectral Display
The PW spectral is not active until the
key is pressed. With the de-
fault setting, pressing the
UPDATE
key also
freezes the 2D image.
Press the knob to activate the PW
mode context menu (right). The STEER AN-
GLE appears only with linear array probes.
Figure 10.3:
PW Mode Menu
10.2.3 Pulse Repetition Frequency (PRF)
The Pulse Repetition Frequency sets the velocity range of the spectral display.
The range of the PRF depends on the probe and the application mode.
Flip the
PRF
switch up/down to increase/decrease the PRF range.
✖
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.
• press
to select WF .
• turn the function knob to change the value of the filter.
✖
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.
SET
STEER ANGLE
0
ECG
→
BASELINE
0
ANGLE CORRECT
OFF
DISPLAY FORMAT
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