Measurement and Analysis
284 Vivid S5/Vivid S6 User Manual
R2424458-100 Rev. 2
softkey. The user is asked to confirm or adjust the AVC
timing setting ("Timing Validation" on page 284).
ROI Adjustment
1. Press
RECALC.
2. The following adjustments can be done:
• Adjust ROI WIDTH.
• Press Redraw to re-define the ROI.
• Adjust the shape of the existing ROI: move the cursor
over the inner ROI border, select an anchor point and
move it to a new location. The shape of the ROI is
updated accordingly.
Press the Process softkey, or allow data processing to start
automatically if the cursor is not moved for a few seconds
(configurable).
The Tracking validation screen is displayed for tracking
validation.
Timing Validation
Timing information may be crucial to accurate diagnosis. The
most important event timing is the aortic valve closure (AVC),
since it is part of the definition of the peak systolic strain
parameter.
Determination of the AVC timing by the system is as follow,
depending on the situation:
• If AVC timing has been measured by the operator (through
an event timing measurement tool) prior to running AFI, the
system is using this data.
• If event timing is not available, an automatic AVC estimate
is used, determined by the temporal contraction of all LV
segments (Strain curves).
• From the APLAX view, the user can adjust the estimated
AVC timing. The adjusted AVC timing will then be used in
the other apical views when running AFI on these views.
This option is only available from the APLAX view.
AVC Timing Adjustment
Note: This procedure is available in the APLAX view only.
1. After validation of the tracking quality, the frame for the
current AVC setting (automatic or event timing
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