GE Vivid 7 User Manual

							Quantitative Analysis
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Quantitative Analysis window
Over view
 Figure 7-1: The Quantitative analysis window (here with TVI data)
The color cineloop window
1. Color cineloop window
2. Tissue cineloop window
3. Analysis window
4. Sample Area5. Time at cursor position and velocity at cursor 
position
6. Trackball Assignments
7. Sample area tools
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Displays TVI, Tissue Tracking, Strain, Strain 
rate or Angio color-coded data.
Sample area (1):
Indicates sampling position of the velocity 
(TVI), displacement (Tissue Tracking), percent 
deformation (Strain), deformation rate (Strain 
rate) or intensity (Contrast) trace. The sample 
area is color-coded: the first sample area is 
yellow, the second green...etc.
a) Shown only when a sample area is 
selected (pointed at).
b) With Contrast data only.
c) Shown only when pointing at an 
anchored sample area.The cineloop windows system menu
This menu is entered by pressing 
UPDATE 
MENU when the QA trackball cursor is within 
one of the Cineloop windows.
• Delete all Sample areas: removes all traces 
at once.
• Disable frame
b: the current frame is 
excluded from the cineloop display.
• Set Sample area Shape
a: enables resizing 
of a selected sample area by setting height, 
width and tilt angle. The trackball marker 
must be pointed at an anchored sample area.
• Label Sample area...
a: set a descriptive 
name to the sample area. The label is useful 
for identification of the sample area when 
exporting data. 
• Delete anchor
c: remove anchoring from a 
dynamic sample area (see also page 244 
and page 245).
• Delete Sample area
a: removes selected 
sample area from the Cineloop window and 
belonging trace in the Analysis window. The 
trackball marker must be pointed at an 
anchored sample area.
• Cancel: exits the System menu.
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The Tissue cineloop window
Displays 2D data
Sample area (1):
Indicates sampling position of the velocity 
(TVI), displacement (Tissue Tracking), percent 
deformation (Strain), deformation rate (Strain 
rate) or intensity (Contrast) trace. The sample 
area is color-coded: the first sample area is 
yellow, the second green...etc.
Sample area tools:
•  : creates a sample area based on 
freehand drawing.
•  : creates a sample area with a pre-
defined circular/elliptic shape (configurable, 
see page 250)
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The analysis window
TVI:
Displays velocity trace
1. Y axis: velocity scale (cm/s)
2. X axis: Time (s)
3. ECG
4. Time at cursor position
5. Velocity at cursor position
6. Velocity at frame marker position 
(color coded)
Tissue Tracking:
Displays tissue displacement trace
1. Y axis: displacement scale (mm)
2. X axis: time (s)
3. ECG with Tracking start and Tracking 
end markers
4. Time at cursor position
5. Displacement at cursor position
6. Displacement at frame marker 
position (color coded)
Strain rate:
Displays Strain rate trace (rate of deformation 
(s
-1))
1. Y axis: s-1
2. X axis: time (s)
3. ECG
4. Time at cursor position
5. Strain rate at cursor position
6. Strain rate at frame marker position
1
2
3
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Strain:
Displays Strain trace (extent of tissue 
deformation (%))
1. Y axis: percent displacement
2. X axis: time (s)
3. ECG with Strain start and Strain end 
markers
4. Time at cursor position
5. % deformation at cursor position
6. % deformation at frame marker 
position (color coded)
Contrast:
Displays time-intensity curve
1. Y axis: Intensity scale (logarithmic) 
(dB) or linear acoustic units (AU).
2. X axis: Time (s) or dT (s), elapsed 
time from previous frame.
3. ECG: displays ECG trace, the current 
frame marker and the start and stop 
markers for the cineloop.
4. Time at cursor position
5. Intensity (dB or AU) at cursor position
6. Intensity (dB or AU) at frame marker 
position (color coded)
1
2
3
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a) With contrast data only.
b) Shown only in zoom mode.The analysis window system menu:
This menu is entered by pressing 
UPDATE 
MENU when the QA cursor is within one of the 
analysis window.
• Delete all Sample areas: removes all traces 
at once.
• Analysis signal: toggles trace display 
between velocity, displacement, strain rate, 
stain or greyscale intensity curves.
• Drift compensation: compensates drifting 
of strain or Tissue Tracking curves by either 
resetting the curve to zero at the tracking 
start point (cycle resetting) or by linear 
compensation throughout the cycle (linear 
compensation)
• Horizontal scale: set horizontal unit as time 
(s) or time interval (dt) between frames.
• Vertical auto-scaling: selects between full 
unit range or a range according to the 
maximum and minimum values of the 
displayed trace(s).
• Vertical unit
a: toggles between logarithmic 
(dB) and linear acoustical units (AU).
• Line style: selects between solid line only or 
solid line with square markers at each data 
point.
• Smoothing: smooths the trace displayed by 
applying a filter over a defined time window. 
Both the filter type and time window are user-
selectable. The type of filter available is 
depending on the analysis signal displayed.
• Export traces: saves trace data in ASCII 
format, readable in spreadsheet programs. If 
present, trace data for physiological traces 
are also exported.
• Curve fitting
a: toggles between Wash-in, 
Wash-out and off.
• Unzoom
b: restores full analysis window 
display when in zoom mode.
• Cancel: exits the System menu. 
						

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The Trackball assignments
QA:
Pointing tool in Quantitative analysis mode.
Scroll/Speed:
•  When the cineloop is stopped, enables 
scrolling through the cineloop.
•  When the cineloop is running, enables 
control of the cine replay speed. 
						

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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 
SELECT 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 250).
1. If the Trackball assignment is not on QA, press 
TRACKBALL 
until QA is highlighted.
The trace and sam-
ple area are color-
coded. First gener-
ated 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 
SELECT 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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that the Strain cursor is within the myocardium when anchoring 
the sample area.
Trace from a freehand sample area
1. Select the Pencil button .
2. Trackball to one of the Cineloop windows.
The trackball cursor is changed to a cross.
3. Press and hold down the 
SELECT button while drawing a 
sample area with the trackball.
4. Release the 
SELECT button.
The sample area is automatically closed.
The trace is updated accordingly in the Analysis window.
Manual tracking of the sample area 
(dynamic anchored sample area)
The sample area can be moved within the loop to ensure that 
data in the trace are generated from the same anatomical 
location during the cyclic motion of the heart.
1. Place a sample area over a region of interest.
Note the anatomical location of the sample area.
2. Using the trackball, scroll to a new frame.
3. Press 
TRACKBALL until the QA trackball assignment is 
selected.
4. Trackball to the sample area.
5. Press 
SELECT.
The sample area is unanchored.
6. Drag the sample area to the corresponding anatomical 
location in the new frame.
In the original 
frame and this par-
ticular frame the 
sample area is 
marked with an an-
chor.When the sample area is anchored in more than one 
frame, linear interpolation is performed, so that the sample 
area is smoothly moved between the anchored positions in 
the selected frames when running the cineloop.
7. Press 
TRACKBALL until the Scroll trackball assignment is 
selected.
8. Using the Trackball, scroll through the cineloop and control 
that the sample area follows the moving anatomical 
structure.
9. Add anchored sample areas in several frames to obtain a 
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To move a dynamic anchored sample area
1. Press TRACKBALL until the Scroll trackball assignment is 
selected.
In these frames the 
sample area is 
marked with an an-
chor.2. Using the trackball, browse through the cineloop to display 
one of the frames where the sample area was anchored.
3. Press 
TRACKBALL until the QA trackball assignment is 
selected.
4. Trackball to the sample area to move, in one of the 
Cineloop windows.
5. Press 
SELECT.
The sample area is unanchored.
6. Drag the sample area to a new location.
7. Press 
SELECT to anchor the sample area to the new 
location.
Zooming in the Analysis window
1. In the Analysis window, press and hold down the SELECT 
key while dragging the trackball cursor to define the 
zooming area.
2. Release the 
SELECT key.
The selected area is displayed in the Analysis window.
To unzoom
1. Press UPDATE MENU in the trackball area on the control 
panel.
The System menu is displayed.
2. Trackball to Unzoom.
3. Press 
SELECT.