36
and velocity. The transverse axis of the spectrum pattern represents the time and the
longitudinal axis indicates the Doppler frequency shift.
PW mode has the function of distance gating, which can show the velocity, direction and
nature of local blood flow at a certain depth.
CAREFUL
The timing of PW mode is not consistent with that of B/C mode,
so it is impossible to move the probe to change the position of
measurement when entering PW mode.
4.7.1
PW mode image parameter
During PW mode image scanning, the image parameter area on the left side of the screen
provides real-time parameter information, which allows you to adjust the following
parameters:
Adjustment method
Parameter term
Control panel
adjustment
Gain, depth
SoftKey adjustment
Speed, baseline, deflection, quick correction angle, flip, SV,
wall filter, frequency, dynamic range, volume, recording
range, pseudo-color map, sound power, time mark,
automatic calculation,automatic calculation parameters
4.7.2
PW mode image optimization
Frequency
Resume
Switching the probe frequency in Doppler mode, the frequency value is
displayed in the image parameter area on the left side of the screen in real
time.
Effect
The higher the frequency, the higher the resolution and sensitivity, but the
lower the penetration force.
Trace Area
Resume
Change the Trace Area between Above, Below and All.
Auto Calculation
Resume
Set auto calculation on and off.
Auto Calculation parameters
Resume
Set PS, ED, MD, PV, TAMAX, PPG, MPG, HR, VTI, RI, DT, AT, S/D, PI, D/S auto
calculation parameters.
