Measurement and Analysis
Vivid S5/Vivid S6 User Manual 299
R2424458-100 Rev. 2
border" on page 294).
• In case editing the endocardial border is too difficult you
may start all over again by pressing Redraw and retrace
the border ("Tracing the endocardial border" on page 294).
Possible causes of poor tracking
Poor tracking quality could result from a variety of causes. The
common causes for bad tracking are:
• Erroneous placement of the basal points when defining the
border. If the basal points are placed too far from the
annular region, the border segments at the annular base
will not move together with the underlying 2D image
throughout the entire heart beat.
• Erroneous placement of the apex point when defining the
border. The point should be placed so that the resulting
border trace covers mainly the endocardium. If the apex
point is placed too high, the border trace will mainly cover
the epicardium resulting in poor tracking.
• Too much clutter. Images with too much static clutter will
result in poor tracking.
Results
For each of the views, a results screen containing the EF
calculation, appears (Figure 7-28) with a small mini-report
appearing in the results window on the right side (Figure 7-31).
Figure 7-31: Mini Report
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