B-K Medical Pro Focus 2202, User Manual

Page: 147 / 356

Power Mode – Power Doppler 147
Adjusting the Power Mode Image
Color Box
The color box outlines the area of the tissue in which flow information is available.
For information about adjusting the size and position of the color box, see “Color
Box” on page 139. The view must be scanning when you adjust the color box.
To resize the color box:
1 Point at the box or select it by clicking inside it or pressing
[
j
]
.
2
Press
[
+/-
]
.
or
• Click a corner of the box and drag the corner.
To move the color box:
•
Click inside the box and drag the box.
Gain
You can adjust the gain of the Power mode image. The view must be scanning when
you do this.
To adjust Power mode gain:
•
Turn the
[
Color/Power Gain
]
dial.
or
• Click Gain under Power on the left side of the screen and drag the slider (or
point at Gain and press
[
+/-
]
).
The current Power gain setting (a percentage) is displayed on the screen next to
Gain.
Range
As in Color mode, you can vary the PRF (pulse repetition frequency) to select the
range of velocities (frequencies) that are color-coded and displayed. The range must
be carefully adjusted to filter out movement of the vessels and avoid aliasing.
To adjust the velocity range:
• Press
[
z
]
to step through the available ranges.
or
•
Click PRF under Power on the left side of the screen and select value you want
(or point at PRF and press
[
+/-
]
).