Specifications

312 VisualSonics Vevo 2100 Imaging System Operator Manual Rev 1.1
Chapter 43: Acquiring Color Doppler Mode images
Beam Angle
Helps you generate flow direction information when the orientation of your target vessel
is perpendicular or almost perpendicular to your ultrasound beam.
This control applies a graduated series of transmission and reception delays to the
ultrasound sound signals of each crystal in the transducer. These carefully calibrated
sequences can effectively steer the ultrasound beam in order to detect minute frequency
shifts.
In PW Doppler Mode and PW Tissue Doppler Mode, the current beam angle setting is
displayed in the top-left corner of the B-Mode scout image.
In Power Doppler Mode and Color Doppler Mode, this changes the color box.
Active during Color Doppler Mode, Power Doppler Mode, PW Doppler Mode, PW
Tissue Doppler Mode imaging sessions.
To use this rocker switch control:
Push up or pull down the control depending on the orientation of your transducer to
steer the beam angle.
Priority
Determines the threshold point on the gray scale above which the system does not apply
color data. The red marker along the left side of the gray scale indicates the threshold
point.
Push up to assign more priority to the color data. Pull down to assign less priority to the
color data and more priority to the threshold on the B-Mode grayscale bar.
Useful when you suspect, for example, that color data is covering over the actual contour
of a vessel wall. In this case you would lower the priority until the overlay data matches
the actual tissue contour and properties.
Baseline
Adjusts the vertical position of the horizontal zero frequency line (the baseline) that
divides the image data coming toward the transducer face from the image data moving
away from the transducer face. Push up to raise the line. Pull down to lower the line.