Image Optimization 5-21
During Power mode imaging, menus for B mode and Power mode are displayed in
the soft menu at the same time, use the left/right keys of soft menu controls <4> to
switch between the menus of B mode and Power mode.
In Power mode, acoustic power is synchronous with that of B mode. Adjustment of the
depth or zoom to the B mode image will lead to corresponding changes in Power
mode image.
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.
Parameters consistent with those in Color mode and B mode are not to be introduced,
please refer to relevant section of the Color mode and B mode, while special items of the
Power mode are introduced in the following.
5.6.3 Power Mode Image Optimization
Power Gain
Description
Refers to the overall sensitivity to flow signals, and this function is used to
adjust the gain in Power mode. The real-time gain value is displayed in the
image parameter area in the upper left corner of the screen.
Operation Rotate the <iTouch> 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 increase the flow signal presented as well as noise,
while the signals may be missing when the gain is adjusted too low.
Map
Description
This feature indicates the display effect of power image. The maps in
Power mode image are grouped into two categories: Power maps and
Directional Power maps.
Operation Select the map through the [Map] item in the soft menu or menu.
There are 8 kinds of maps provided: P0-3 belong to Power Mode maps,
while dP0-3 belong to Directional Power Mode maps.
The Power maps provide information of blood flow, which are highly
sensitive to the low-velocity flows.
The Directional Power maps provide information of flow direction.
Impacts The function is available in real-time imaging, freeze or cine review status.
Dynamic Range
Description
This function is to adjust the transformation of echo intensity into color
signal.
Operation Adjust through the [Dyn Ra.] item in the soft menu or menu.
The adjusting range is 10-70dB in increments of 5dB.
Effects Increasing dynamic range will lead to higher sensitivity to low-power
signals, thus enhances the range of signals to display.
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