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Chapter 4 Diagnosis Modes
Color Bar
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.
X
Adjusting the color bar baseline: Tap the ‘ / ‘ buttons on the touch screen to raise or lower
the color bar’s baseline.
C Mode Menu
Steer
NOTE: The Steer function only appears on the soft menu when a linear probe is used.
Adjust the angle of the ultrasound beam. Loss of color information resulting from the angle of the
ultrasound beam is minimized. You can adjust the angle of the ultrasound beam by tapping the
Steer button on the touch screen.
Scale
Tap the Scale button on the touch screen to use. Tapping ‘+’ of the Scale button makes the PRF
(Pulse Repetition Frequency) increase, displaying a wider range of blood ow speed; tapping ‘-’
decreases the PRF, displaying a narrower range of blood ow speed.
Maps
Congure the post curve in a color image. Tap the Maps button on the touch screen to display
blood ow with greater clarity.
Filter
Select a value from 1 to 4 by using the Filter button on the touch screen.
This is an electric lter for removing 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 from the screen.
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