10 Virtual Touch Applications
Instructions for Use 10 - 23
 Use the Time map to improve boundary definition in structures with elevated shear wave
velocities or elasticity values. The time map represents the relative travel time differences
of shear waves within the image.
 Use the Displacement map to improve visualization of structural boundaries where large
differences in shear wave amplitude can occur. The Displacement map indicates the
relative differences of shear wave magnitude in the image and are represented in shades
of blue. The lightest blue represents the highest relative displacement magnitude. Shear
wave displacement is typically lower in very stiff tissue compared to softer tissues. You can
correlate the Displacement map to the Quality map to understand if poor shear wave
quality may be related to low shear wave displacement. In general, high shear wave
velocity and elasticity (stiffness) are for low shear wave displacement.
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