Specifications

252 VisualSonics Vevo 2100 Imaging System Operator Manual Rev 1.1
Chapter 37: Acquiring PW Doppler Mode and PW Tissue Doppler Mode images
Volume
Adjusts the speaker volume for the PW Doppler Mode and PW Tissue Doppler Mode
audio data that the system acquires along with the spectral data.
To use this dial control:
 Turn clockwise to increase the volume.
 Turn counterclockwise to decrease the volume.
Active during: PW Doppler Mode and PW Tissue Doppler Mode image acquisition and
review sessions.
Frequency
Adjusts the transmit frequency of the transducer between the higher and lower
frequency levels that are supported by the specific transducer. When you increase the
frequency you can improve detail at the focus depth but the system tends to lose detail at
deeper tissues.
Push forward to increase the frequency. Pull back to decrease the frequency.
Invert
Flips the image.
In PW Doppler Mode and PW Tissue Doppler Mode in the dual window view: Press
to flip the spectrum window vertically.
Dynamic Range
Adjusts the input signal strength that is mapped into the spectral display. Range: 5-
100dB.
 Push up to increase the range by 5dB and lower contrast. Higher dynamic ranges are
often used in cardiac imaging.
 Pull down to decrease the range by 5dB and increase contrast. Lower dynamic ranges
are often used in abdominal imaging.
In PW Doppler Mode and PW Tissue Doppler Mode: Applies to the spectral display in
the lower, spectral image data, window. Does not apply to the B-Mode scout window.