Measurement and Analysis
Vivid S5/Vivid S6 User Manual
283
R2424458-100 Rev. 2
The ROI is divided into segments. The tracking quality for each
segment is automatically evaluated and summarized in the
Scoring table
(Figure 7-61).
Tracking Validation
The tracking for each segment must be visually controlled and
validated. Poor tracking quality could result from a variety of
causes. Select
Quick tips
(Figure 7-61) to get tips on the most
common causes for bad tracking. The 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
heart beat (see example cineloops in the Quick tips).
•
Erroneous placement of the apex point when defining the
ROI. The point should be placed so that the resulting ROI
covers mainly the endocardium. If the apex point is placed
too high, the ROI will mainly cover the epicardium resulting
in poor tracking (see example cineloops in the Quick tips).
•
Too small ROI width. Narrowing the ROI too much will
result in poor tracking due to lack of tissue data in the ROI
(see example cineloops in the Quick tips).
•
Too much clutter. Images with too much static clutter will
result in poor tracking (see example cineloops in the Quick
tips).
To validate the Tracking:
1.
Inspect each segment and make sure that the center line is
moving together with the underlying 2D image.
Note
: The tracking quality is automatically evaluated for
each segment and displayed in the Scoring table. The
tracking in each segment is scored as either Acceptable
(
) or unacceptable (
).
If the tracking needs to be improved for some segments,
the user can modify the ROI ("ROI Adjustment" on
page 284). The user may override the tracking quality
evaluation done by the system by clicking on the
evaluation result in the
Scoring table
.
2.
Once the tracking quality has been validated for all
segments, press
Approve
in the
Scoring table
, or
Approve
Summary of Contents for Vivid S5
Page 18: ...Revision History xvi Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Page 30: ...Introduction 12 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Page 154: ...Basic scanning operations 136 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Page 250: ...Stress Echo 232 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Page 260: ...Contrast Imaging 242 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Page 420: ...Quantitative Analysis 402 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Page 508: ...Archiving 490 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Page 600: ...Peripherals 582 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
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