GE Vivid S70, User Manual

Page: 170 / 709

Image Optimization
5-34
Vivid S70 / S60
–
User Manual
BC092760-1EN 01
Using Strain
1. From TVI Mode, press Strain .
2. Adjust Strain Start close to the R-peak.
3. Adjust Strain end to end systole, typically near the T-wave.
4. Use the trackball to position the ROI frame over the area to
be examined.
5. Press Select . The instruction
Size
should be highlighted in
the trackball status bar.
NOTE: If the trackball control Pointer is selected, press Trackball to
be able to select between Position and Size controls.
6. Use the trackball to adjust the dimension of the ROI.
Optimizing Strain
• From an optimized Strain rate display adjust strain tracking
to pick out the systolic phase.
• The main use of Strain is to map negative systolic
deformation. This means that
Strain start and Strain end
should be adjusted to pick out the systolic phase of the
cardiac cycle: Adjust
Strain start close to the R-Peak.
Adjust Strain end to end systole, typically near the T-wave.
• The maximum deformation that is color-coded can be
adjusted using the
Strain scale control. If set too low, most
of the wall will show the color indicating maximum
deformation. If set too high, the maximum deformation color
is never reached.
• Strain provides information only in the beam direction. The
apical view typically provides the best window since the
beams are then approximately aligned to the longitudinal
direction of the myocardium (except near the apex).
• Low strain values may be masked out with a different color
using the
SI Reject control.