Specifications
196 VisualSonics Vevo 2100 Imaging System Operator Manual Rev 1.1
Chapter 33: Acquiring B-Mode images
Presets
Active during image acquisition in all modes except 3D-Mode. This rocker switch cycles
you through all the preset groups of acquisition parameters for the active imaging Mode.
The list of presets include the transducer-specific presets as well as any custom presets
that other operators added to the system.
All presets are both mode dependent, transducer dependent and application dependent.
Transmit Power
Adjusts the power of the ultrasound signal transmission.
Turn clockwise to increase power. Turn counterclockwise to decrease power. Between
1% and 10% power the control adjusts power in increments of 1%. Between 10% to 100%
power the control adjusts in increments of 10%.
Depth Offset
Available during all acquisition sessions for all modes that are based on B-Mode or
include a B-Mode scout window. Adjusts, in 1mm increments, the distance from the face
of the transducer at which the system begins to display the ultrasound image.
To use this rocker switch control:
Pull down to remove a 1mm strip of image data from the top. For example, if your
transducer is set to acquire data from 2mm to 12mm, when you pull the control down
once, the display will only show the data between 3mm and 12mm. The minimum
depth varies by transducer.
Push up to add a 1mm strip of image data to the top.
Line Density
Adjusts the resolution of your image by adjusting how many lines of image data the
transducer acquires over your image area. Push up to increase the line density. Pull
down to decrease.
The higher you set your line density, the lower the system sets the acquisition frame rate.
Because of this trade off, you might find that higher line density is most useful for
examining features in tissues that don't move very much such as liver, spleen, pancreas,
and prostrate.
For cardiology applications, you will tend to keep the line density lower so you can
increase the frame rate to measure more tissue movements over the time span of a
complete cardiac cycle.