
7-29
Chapter 7 Diagnosis Modes
Steer Invert
Tap Steer Invert on the touch screen. Tapping the button inverts the angle of the Sample
Volume.
NOTE: Steer Invert is only enabled when using a linear probe.
Scale
Use by rotating the Scale dial-button on the touch screen. Rotating Scale dial-button clockwise
increases the scale, extending the range of blood ow speed. Rotating the dial-button in the
counter-clockwise decreases the scale, displaying a narrower range of blood ow speed.
Sensitivity
It enhances sensitivity and accuracy or frame rate of color images.
Adjust the Sensitivity value between 0 and 5 by using the Sensitivity dial-button on the touch
screen.
Filter
Select Filter on the touch screen or use the dial-button on the control panel to select a value
between 1 and 4.
This is an electric lter to remove the low-frequency doppler signals generated by the
movement of blood vessel walls. Adjust the Cuto Frequency to remove doppler signals whose
frequency is lower than the cuto frequency.
BaseLine
Rotating the dial-button clockwise increases the Baseline. In Color Doppler mode, the color
bar indicates the direction and speed of blood ow. Based on the Baseline at the middle, red
indicates the direction and speed of blood ow toward the probe. By contrast, the blue color
indicates the direction and speed of blood ow away from the probe.
Color Map
Used to congure the post curve in a color image. Select a value between 1 and 12 by using the
Color Map dial-button on the touch screen. This can help to display blood ow with greater
clarity.
h