Specifications

Rev 1.1 VisualSonics Vevo 2100 Imaging System Operator Manual 253
Chapter 37: Acquiring PW Doppler Mode and PW Tissue Doppler Mode images
Doppler Gain
Adjusts the frequency shift in increments of 1.0 dB. Turn clockwise to add gain and
brighten the Doppler data. Turn counterclockwise to reduce gain and darken the data.
Active during: PW Doppler Mode, PW Tissue Doppler Mode, Color Doppler Mode,
Power Doppler Mode image acquisition sessions.
Unless the system is in simultaneous (duplex) mode, the B-Mode image remains constant
with only a change displayed within the PW Doppler spectrum.
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.
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.