GE Vivid S70, Руководство пользователя

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Advanced cardiac measurements and analysis
Vivid S70 / S60
–
User Manual
8-31
BC092760-1EN 01
Determination of the AVC timing by the system is as follows,
depending on the situation:
• 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.
AVC timing adjustment (APLAX only)
After tracking is performed, the system enters the Set AVC
stage. The following options for AVC settings are provided:
•
Automatic
: AVC is set automatically based on the ROI
tracking using the time of peak negative strain.
•
Event timing
: AVC is taken from the event timing
measurements.
NOTE: This option is only available if the operator performed event
timing measurement prior to running AFI, see page 8-11
• Current Frame: Use the provided frame sliders and locate
the AVC time manually before approving with the
Current
Frame button.
Figure 8-17. Parametric Systolic Strain APLAX view
Inspecting results
After completed tracking, and for APLAX completed AVC timing
adjustment, the system displays the
Quad
screen layout for
tracking validation (see page 8-24) and inspection of results for
this view.