GE Vivid S70, User Manual

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Image Optimization
5-56
Vivid S70 / S60
–
User Manual
BC092760-1EN 01
Threshold
TVI, TT, SRI, SI, TSI Controls the level of greyscale intensity that is used as a threshold for color.
Transparency
TVI, TT, SRI, SI, TSI Controls the degree of transparency of the color display.
Track start
TT Controls the time after ECG R-peak when the integration should start.
Track end
TT Controls the time after tracking start when the integration should end.
Tracking scale
TT Controls the color cut-off value of max displacement displayed. The chosen values
are shown on the color bar.
SRI scale
SRI Defines the scale for the color coding of the strain rate.
Strain length
SRI, SI Determines the strain sample volume size. There is a trade-off between noise and
spatial resolution controlled by the Strain length. To minimize noise the Strain
length should be maximized. A value of 12mm is typical for adult cardiac patients.
SRI reject
SRI Adjusts the cut-off level of the low Strain rate to be discarded when generating the
color image. Rejected values are displayed in green.
Strain start
SI Controls the time after ECG R-peak when the strain calculation should start. The
strain start time is displayed on the screen and is represented on the ECG by a red
marker.
Strain end
SI Controls the time after strain start when the strain calculation should end. The
strain end time is displayed on the screen and is represented on the ECG by a red
marker.