5-24 Image Optimization
îš„ During PW/ CW mode imaging, menus for B mode and PW/ CW mode are displayed
in the soft menu at the same time, use the left/right keys of directional soft menu
controls to switch the among menus of B mode and PW/ CW mode.
îš„ In PW/CW mode, acoustic power of the probe is synchronous with that of B mode.
îš„ When you adjust the depth of the B mode image, related changes will occur in
PW/CW Mode image as well.
îš„ Most of the parameters are the same for the PW mode and CW mode, so parameters
of the both are combined together to be introduced here.
îš„ Adjustment items, such as SV, steer, Duplex, iTouch, Triplex and HPRF, are not
available in the CW mode.
îš„ Items that appear in the menu or the soft menus are dependent upon preset, which
can be changed or set through "[Setup] → [Image Preset]"; please refer to "5.13
Image Preset" for details.
îš„ Press <Update> to switch between the real-time B and freezing B images.
Only phased probes support CW mode.
5.7.3 PW/CW Doppler Mode Optimization
Gain
Description 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 upper left corner
of the screen.
Operation Rotate the <PW> knob clockwise to increase the gain, and anticlockwise to
decrease.
Or adjust it in the image parameter area.
The adjusting range is 0-100.
Effects Increasing the gain will brighten the image and you can see more received
signals. However, noise may also be increased.
Frequency
Description Refers to the operating frequency in PW mode of the probe, the real-time
value of which is displayed in the image parameter area in the upper left
corner of the screen.
Operation Select the frequency value through the [Frequency] item in the soft menu
or menu.
Or adjust it in the image parameter area.
Values of frequency vary depending upon the probe types.
Select the frequency according to the detection depth and current tissue
characteristics.
Effects The higher the frequency, the worse the axial resolution, and the better the
force of penetration.
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