Image Optimization 5-25
5.7.3 PW/CW Mode Image Optimization
Gain
This function is intended to adjust the gain of spectrum map. The real-time gain value
is displayed in the image parameter area in the left corner of the screen.
Rotate <PW> knob clockwise to increase the gain, and anticlockwise to decrease.
Increasing the gain will brighten the image and you can see more received signals.
However, noise may also be increased.
PW Sampling Gate
Adjusts the SV position and size of sampling in PW mode, the real-time value of SV
and SVD are displayed in the image parameter area in the left corner of the screen,
in which SV represents the size of the sampling gate, and SVD represents the
sampling depth.
SV size Rotate the knob under [SV] on the touch screen to adjust the SV size.
SVD Roll the trackball to select the SV depth.
Effects
The smaller the SV size becomes, the more accurate the result is; and more
information can be obtained when selecting large SV size.
CW focus position
Description To adjust the focus position of CW mode. The real-time focus position value is
displayed on the image parameter area in the left corner of the screen in SVD.
Operation Roll the trackball to select the focus depth.
Image quality
Description Refers to the transmitting frequency in Doppler mode of the probe, the real-time value
of which is displayed in the image parameter area in the left corner of the screen.
Operation
Rotate the knob under the [Image Quality] on the touch screen to select the different
fundamental wave value.
The adjusting range of basic frequency values can be divided into penetration
preferred (Pen), general mode (Gen), resolution preferred (Res).
Please select the frequency according to the detection depth and current tissue
features.
Scale
Description This function is used to adjust the speed range of color flow, which is adjusted through
PRF in the system. The real-time PRF value is displayed in the image parameter area
in the left corner of the screen.
Operation Rotate the knob under [Scale] on the touch screen to complete the adjustment.
To provide a much clearer color flow image.
Use low PRF to observe low-velocity flows, and use high PRF to observe high-velocity
flows.
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