Specifications

Rev 1.1 VisualSonics Vevo 2100 Imaging System Operator Manual 257
Chapter 37: Acquiring PW Doppler Mode and PW Tissue Doppler Mode images
Acquisition
Parameter Description
Doppler Gain
The PW Doppler frequency, measured in dB. Adjust with the
Doppler Gain
control.
Beam Angle
The number of degrees of steer to the ultrasound beam so you generate flow direction
information when the orientation of your target vessel is perpendicular or almost
perpendicular to your ultrasound beam. Adjust with the
Beam Angle
control.
Wall Filter
The level of low velocity signals, measured in Hz, filtered out of the spectral display.
Adjust with the
Wall Filter
control.
Simultaneous
The state (On or Off) of the
simultaneous display of live acquisition data in both the B-
Mode scout window and the PW Doppler Mode image window. Adjust with the
Simul
control.
Display
Parameter Description
Dynamic Range
The contrast of your image, measured in dB. Adjust with the
Dynamic Range
control.
Display Map
The selected predefined display map from the predefined set of maps. Adjust with the
Display Map
control.
Doppler SV
Parameter Description
Depth
The distance, measured in mm, from the face of the transducer. Adjust with the
Image Depth
control.
Size
The length, measured in mm, of the sample volume. Adjust with the
SV/Gate
control.
Angle
The angle correction, measured in degrees, between the vertical line of the ultrasound
pulse from the face of the transducer and the direction of vascular flow, as indicated by
the dashed yellow line.
This angle always displays a positive value between 0° and 80°, regardless of which
side of the vertical line it is positioned on.
Adjust with the
Doppler Angle
control.
Setting the PW Doppler Mode sample volume
In PW Doppler Mode, the region of interest is the image data that the transducer
acquires along the vertical line between the brackets of the yellow wireframe in
the B-Mode image. This line is called the sample volume (SV).