Image Optimization 5-19
During Power mode imaging, the image optimizing menus for B mode and Power mode are
displayed on the touch screen at the same time. You can switch between the 2 modes by clicking
the mode tabs.
In Power mode, the acoustic power is synchronous with that of B mode. Adjustment of the depth to
the B mode image will lead to corresponding changes in Power mode image.
Parameters consistent with those in Color mode and B mode are not to be introduced. See the relevant
Color mode and B mode sections, while special items of the Power mode are introduced in the
following.
5.5.3 Power Mode Image Optimization
Power Gain
Description
Refers to the overall sensitivity to flow signals. 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 top-right
corner of the screen.
Operations
Rotate the <Color> knob clockwise to increase the gain, and counter-clockwise to
decrease it.
The adjusting range is 0-100 in increments of 2.
Increasing the gain will increase the flow signal presented and noise. The signals may
be missing when the gain is adjusted too low.
Color Map
Description
This feature indicates the display effect of the Power image.
The maps in the Power mode image are grouped into two categories: Power maps
and Directional Power maps.
To select from among the maps, turn the knob under [Color Map] on the touch screen
or adjust through the mapping-menu item.
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 about blood flow, which are highly sensitive to
the low-velocity flows.
The Directional Power maps provide information about flow direction.
Dynamic Range
This function adjusts the transformation of echo intensity into color signal.
Adjust through the [Dyn Ra.] item or the mapping-menu item on the touch screen to
adjust the dynamic range.
The adjusting range is 10-70dB in increments of 5dB.
Effects
Increasing the dynamic range leads to higher sensitivity to low-power signals, thus
enhancing the range of signals to display.
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