Measurements and Analysis
8-24 Vivid S70 / S60 – User Manual
BC092760-1EN
01
Once the tracking quality has been controlled for all segments,
you may choose to click:
• Reprocess – To completely reprocess the view currently
being reviewed. This will take the user back to "Define ROI"
stage of the workflow.
• Approve and Select Next – To proceed analyzing the next
view in order to achieve a complete Bull’s eye.
• Approve and Exit – To exit the tool and store performed
measurements. No segmental strain results are stored in
this case.
NOTE: In case of a multi-cycle recording, the system automatically
launches the second to last cycle for analysis. If during analysis,
the operator wants to switch to another cycle, that is possible by
entering the Select View stage and change cycle using the
Cycle button. Also, the CineStart and CineEnd markers may be
adjusted by clicking and dragging the markers on the ECG for
precise edition of the selected cycle.
Tracking validation
Poor tracking quality could result from a variety of causes. The
most common causes for bad tracking are:
• Erroneous placement of the basal points when defining the
ROI. If the basal points are placed too far from the annular
region, the ROI segments at the annular base will not move
together with the underlying 2D image throughout the entire
heartbeat.
• Erroneous placement of the apex point when defining the
ROI. The point should be placed so that the resulting ROI
covers mainly the myocardium. If the apex point is placed
too high, the ROI will mainly cover the epicardium resulting
in poor tracking.
• Too narrow ROI width. Narrowing the ROI too much will
result in poor tracking due to lack of tissue data in the ROI.
• Too much clutter. Images with too much static clutter will
result in poor tracking.
Inspect each segment and make sure that the center line is
moving together with the underlying 2D image. When in Quad
layout it may be helpful to turn off the color overlay by clicking
Color button. It can also be helpful to reduce playback speed by
Poor tracking quality may lead to incorrect measurement
results. The tracking for each segment must be visually
controlled and validated.
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