
4-19
Chapter 4 Diagnosis Modes
Scale (PRF)
Use the
Soft Menu
dial-button
[5]
. R
otating the Scale dial cloc
kwise makes the PRF (Pulse Repetition
Frequency) increase so that the speed range of the blood ow is widened, and vice versa.
Baseline / Filter
X Baseline
If you rotate the
Soft Menu
dial-button
[6]
clockwise, the baseline rises.
In Color Doppler Mode, the color bar indicates the direction and speed of blood ow. Relative to the
baseline in the centre, the red color indicates the direction and speed of the blood ow towards a
probe. By contrast, the blue color indicates the direction and speed of the blood ow away from a
probe.
X Filter
The lter is an electrical lter used to eliminate low-frequency Doppler signals caused by the motion
of vessel walls. Adjust the Cuto Frequency to remove the Doppler signals for which the frequencies
are lower than the Cuto Frequency from the screen.
Select a value between F 0 and F 3 by pressing the
Soft Menu
dial-button
[6]
. The value will be
displayed on the monitor.
Color Map
Sets the Post Curve of an image. Select a type between 1 and 14 by rotating
Soft Menu
dial-button
[1]
.
Balance
Adjust the range of color image display by comparing the Gray Level of the 2D image with the Doppler
signal values of the color image. As the Balance value increases, the color image appears, even in
regions with a high Gray Level in 2D image (bright regions), expanding the range of the color image.
Use the
Soft Menu
dial-button
[2]
to choose a Balance value between 1~16.
Color Format
Sets C Mode to use. Select Color + B/W, B/W Only or Color Only by rotating the
Soft Menu
dial-button
[3]
.
Color Mode
Sets the color display. Select Velocity or Vel + Var by rotating the
Soft Menu
dial-button
[4]
. If Velocity
or Vel+ Var is selected, a numeral representing the number of a color scale is indicated above and
below the color bar.
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