GE Vivid 7 User Manual

Scanning Modes
Vivid7/Vivid7 PRO Users Manual137
FC092326-03
 Figure 3-17: The Strain Mode controls on the front panel
Strain calculates and color-codes the extent of tissue 
deformation (lengthening or shortening) relative to the original 
size over a given time interval, typically the systole.
1. Assignable keys:
• Strain start R
• Strain end R
• Strain scale R
• Invert R
• Simultaneous R
• Color maps R
• Q-Analysis (Freeze 
only)
• Cineloop (Freeze 
only)
MORE
• 2D width
ALT
• Curved AMM R
• AMM R
•...

Scanning Modes
138Vivid7/Vivid7 PRO Users Manual
FC092326-03
Strain controls
Strain assignable controls
Strain start
The time after ECG R-peak when the strain calculation should 
start. The strain start time is displayed on the screen and is 
represented on the ECG by a red marker.
Strain end
The time after strain start when the strain calculation should 
end. The strain end time is displayed on the screen and is 
represented on the ECG by a red marker.
Strain scale
Defines the scale for the color coding...

Scanning Modes
Vivid7/Vivid7 PRO Users Manual139
FC092326-03
•  Curved Anatomical M-Mode (see page 98)
•  Tissue Synchronization Imaging (see page 142)
•  Tissue Tracking (see page 125)
•  Strain rate (see page 130)
•  Strain (see page 136)
Strain Soft menu controls
Frame rate
Controls the line density. When adjusting frame rate, there is a 
trade off between spatial and temporal resolution.
Strain length
Determines the strain sample volume size.
Strain Reject
Adjust the cut-off level of the low tissue...

Scanning Modes
140Vivid7/Vivid7 PRO Users Manual
FC092326-03
Use Averaging con-
trols with caution 
so as not to obscure 
significant diagnos-
tic information.Radial Averaging
Smooths the image by averaging collected data along the 
same radial line. An increase of the radial averaging will reduce 
noise, but this will also reduce the radial resolution.
Power
Controls the amount of acoustic power applied. When power is 
reduced the signal to noise ratio is reduced, so that the image 
may become noisier....

Scanning Modes
Vivid7/Vivid7 PRO Users Manual141
FC092326-03
Using Strain
1. From TVI Mode, press  ALT on the control panel and press 
STRAIN.
2. Adjust 
STRAIN START close to the R-peak.
3. Adjust 
STRAIN END near the T-wave.
Optimizing Strain
•  From an optimized Strain rate display adjust strain tracking 
to pick out the systolic phase.
•  The main use of Strain is to map negative systolic 
deformation. This means that 
STRAIN START and STRAIN 
END should be adjusted to pick out the systolic phase of...

Scanning Modes
142Vivid7/Vivid7 PRO Users Manual
FC092326-03
Tissue Synchronization Imaging (TSI)
TSI over view
 Figure 3-18: The TSI mode screen
1. TSI start/end
2. TSI start and end 
markers
3. TSI color bar
4. Status window
5. Soft menu
Controls marked with R 
are also available in 
freeze and cine replay. 

Scanning Modes
Vivid7/Vivid7 PRO Users Manual143
FC092326-03
 Figure 3-19: The TSI mode controls on the front panel
TSI calculates and color-codes the time from onset of QRS to a 
detected event, typically the time to peak systolic velocity.
1. Assignable keys:
• Frame rate
• TSI R
• Simultaneous R
• Color maps R
• Cineloop (Freeze 
only)
• Q-Analysis (Freeze 
only)
MORE
• 2D width
• TSI start R
• TSI end R
ALT
• Curved AMM R
• AMM R
• Tissue Tracking R
• Strain rate R
• Strain R
2. Zoom
3. Soft menu:
•...

Scanning Modes
144Vivid7/Vivid7 PRO Users Manual
FC092326-03
TSI controls
TSI assignable controls
Frame rate
Controls the line density. When adjusting frame rate, there is a 
trade off between spatial and temporal resolution.
TSI
Starts/stops TSI.
Q-analysis (in Freeze only)
Starts the Quantitative analysis application (see Chapter 7, 
’Quantitative Analysis’ on page 233).
Simultaneous
Enables simultaneous display of 2D image and 2D image with 
TSI color.
Cineloop (in Freeze only)
Starts cineloop...

Scanning Modes
Vivid7/Vivid7 PRO Users Manual145
FC092326-03
Alter native assignable controls
Press ALT to access to the following modes:
•  Curved Anatomical M-Mode (see page 98)
•  Tissue Synchronization Imaging (see page 142)
•  Tissue Tracking (see page 125)
•  Strain rate (see page 130)
•  Strain (see page 136)
TSI Soft menu controls
TSI Cut-off
Controls the cut-off time: using this control it is possible to color 
all parts of the TSI image that has a time to peak less than a 
certain cutoff time....

Scanning Modes
146Vivid7/Vivid7 PRO Users Manual
FC092326-03
Using TSI
1. From TVI, Tissue Tracking, Strain or Strain rate mode, 
select 
TSI.
2. Press 
MORE and adjust TSI START and TSI END.
3. Optionally adjust 
THRESHOLD.
Optimizing TSI
•  Use apical view when imaging.
•  Activate TSI from an optimized TVI or Strain rate display.
•  To detect regions with post-systolic contraction, adjust 
TSI 
START to start ejection to avoid detecting IVC peaks and TSI 
END to mitral valve opening or later. Regions...