GE Vivid S70, User Manual

Page: 209 / 709

4D-Mode
Vivid S70 / S60
–
User Manual
6-9
BC092760-1EN 01
NOTE: 4D acquisition may also be done in Multi-Slice mode
(‘Multi-Slice acquisition’ on page 6-10) and 4D Zoom
prepare mode (‘4D Zoom prepare acquisition’ on
page 6-13).
The volume acquisition is started.
4. The following parameters may be adjusted during
acquisition:
•
Volume size : adjust the volume size. An increase of the
volume size will reduce the volume rate.
• Volume shape : adjust the ratio between the elevation
and azimuth widths. Changing the volume shape from
default will increase the volume rate.
• Elevation tilt : tilt the volume in the elevation plane and
change the viewing direction accordingly.
• Other parameters: Frame rate, Frequency and Octave.
• Angle (on the Touch panel): display different rendering
views.
• Layout (on the Touch panel): display different layout
alternatives.
5. You may adjust Num Beats to change the number of heart
beats the acquisition should be based on.
6. Press Multi beat on the Touch panel.
The gated acquisition is started. Ask the patient to hold her/
his breath at end expiration. Keep the probe steady and look
for stitching artifacts in both the volume rendering and the
elevation plane in the lower left window of the screen, or use
Multi-Slice (page 6-10) to better assess the stitching quality.
Attention should be brought on stitching quality during
acquisition rather than volume rendering quality.
7. You may adjust Angle to get different rendering views. The
default top/down view is best for stitching quality
assessment.
8. Optimize the image quality as necessary (2D Gain, 4D Gain
and UD Clarity).
•
If desired, select a Color map to colorize the volume
rendering. The Depth color maps use a combination of
colors to improve depth perception.
Press Red or Color Laser lines on the Touch panel
(page 2) to visualize the 2D image locations in the volume
rendering. The 2D image locations are shown as overlaying
red or color coded lines following the surface in the volume
rendering. The color of the laser lines corresponds to the
color coding used for the 2D images.