Choose The Scan Type - GE Revolution CT User Manual

a. Select a contrast mode.
b. Select contrast presets.
Timing parameters.
9. Set the
See Timing Parameters
Gating and Trace options.
10. Set the
Secondary Recon options.
11. Set the
See Recon Parameters

4.5.1 Choose the Scan Type

Use this procedure to choose a scan type to specify how the scan data is acquired.
Scan Settings window, click Scan Type .
1. From the
Scan Type collection, choose the desired scan type.
2. From the
○ Axial for a step and shoot method.
Click
■ Routine head studies typically use Axial scans acquired with a 1 second rotation
time.
■ Hi Res chest studies may use Axial scans acquired with a sub-millimeter (0.625 mm)
slice.
Helical for a continuous table movement method.
○ Click
■ A wide range of exam types use Helical scans.
■
To stop a scan between multiple Helical groups, press <Stop Scan> not <Stop
Move>.
○ Cine when one location needs to be scanned over a period of time, such as for
Click
hemangioma studies.
Full is continuous exposure that supports table movement equal to the beam collimation
or no table movement, where the scan is taken at one table position.
○ Cardiac to help freeze motion of the heart and vascular structures with a Helical-
Click
gated or Cine-gated scan.
Scan Type is changed from another scan type, the mA value automatically updates.
If the
Review it to be sure it is acceptable.
Hi Res Mode , click On in combination with the Axial , Helical , or Cardiac scan type to
3. For
produce images with improved resolution in the x and y directions.
○
Hi Res Mode is supported to enable collection of more views in the x and y directions to
support increased resolution using HD algorithms or improvement in IQ as a result of
having more views, such as for off-center DFOV imaging.
○ The standard set of reconstruction algorithms are compatible with Hi Res acquisitions,
however, the inherent resolution will be reduced to match non Hi Res acquisitions.
Chapter 11 Scan
for details.
for details.
Revolution CT User Manual
Direction 5480385-1EN, Revision 1
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