Quantitative Analysis
386 Vivid S5/Vivid S6 User Manual
R2424458-100 Rev. 2
Generation of a trace
Up to eight traces can be generated.
About the sample area
The sample area can be in three different states:
• Free sample area: freely moving sample area (QA cursor)
before anchoring.
The free sample area
disappears when the
QA cursor is moved
over a static an-
chored frame.
• Static sample area: the free sample area is anchored by
pressing
SET on the Trackball area.
• Dynamic anchored sample area: the sample area is
anchored in two or more frames (see Manual tracking
below). In these particular frames, the sample area is
displayed with an anchor. The sample area moves
smoothly between the anchored positions when
playing/scrolling the cineloop.
To generate a trace
Trace from a pre-defined sample area
The shape of the pre-defined sample area is configurable (see
page 392).
1. If the Trackball assignment is not on QA, press
TRACKBALL
until QA is highlighted.
The trace and sam-
ple area are col-
or-coded. First
generated trace is
yellow, second
green...etc.
2. If necessary, select the sample area Shape button .
3. Trackball to one of the Cineloop windows.
The trackball cursor is changed to a sample area (white
circle).
A preview of the trace is displayed in the Analysis window.
4. Press
SET to anchor the sample area.
In this frame the sample are is marked with an anchor.
If the cineloop has more than one heart cycle a sample
area will also be anchored in the corresponding frame in
the next heart cycles.
The trace is updated accordingly in the Analysis window.
The Strain cursor
In Strain and Strain rate modes, the sample area displays a
Strain cursor showing the segment along the beam direction
that is used for Strain and Strain rate calculations. Make sure
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