Scan Overlap; Single Table Position; Set The Ecg And Gating Settings - GE Revolution CT User Manual

Detailed View On:
•
A blue Graphic Rx hexagon, or series of hexagons, indicates the image regions that have
optimal temporal resolution.
•
Other regions shown in green, indicate image regions that have reduced temporal
resolution, thus these regions are more susceptible to motion artifacts.
Handles are available near the top and bottom of the blue Graphic Rx region. Adjust the location
of these handles to indicate the locations where you require full field of view images. The
system then determines the smallest available scan range that will cover this request, which will
be reflected by the position of the blue region.
Additionally, the user can enter a numerical value for the S/I location in the start or end scan
field. The value that you enter is where you require a full field of view image. The system will
compute and display the location where it will generate the first and last images.

3.4.2 Scan Overlap

The system applies a small amount of overlap when scanning neighboring regions. The amount
of overlap is controllable from the
Minimum will generate images with some susceptibility to motion artifacts in the outer region
•
of axial slices near the table position boundary. This is the pre-populated setting in the GE
Reference protocols.
• More overlap will generate images with optimal temporal resolution, and hence, minimal
susceptibility to motion artifacts throughout the axial slices near the table position boundary.
The increased overlap results in a higher dose scan than

3.4.3 Single Table Position

Single Table Position setting (see Coverage Speed ) is set to One , the system
When the
constrains the scan range to the maximum detector coverage. Set this option to
enable longer scan ranges.

3.5 Set the ECG and Gating settings

ECG and Gating settings control the timing for when the scan data will be acquired.
The
When you select
depend on the scan type selected.
Chapter 13 Cardiac
Coverage Speed collection.
ECG and Gating from the Scan Settings window, the window displayed will
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Minimum .
One or More to
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