○
From the
Recon
tab, click [N] under the Graphic Retro column to display the Graphic
Retro control panel on the image monitor. The cursor can be used to determine DFOV,
R/L and A/P centers.
○
Place the real-time cursor in an image and view the upper-left corner for the RAS
coordinates.
○
Click [List/Select] and select the exam and series from which you want to use the R/L
values. The series values are displayed in the browser menu.
7.
Optional:
Click
A/P Center
and enter an offset value.
8. Optional:
Click
Recon Type
and select the algorithm.
9. From the
ECG and Gating
settings collection, click the Recon mode for the phase
prescription method.
This allows you to select the phases of the cardiac cycle from which images are created.
○
Single Phase (post-scan only): User specified single % or ms value and interval to be
used for reconstruction.
○
Multi-phase (post-scan only): User specified range of % or ms values to be used for
reconstruction.
○
Center Phase (1, All): A reconstruction will occur at the center of the acquisition
window(s).
○
Earliest to Latest: A multi-phase reconstruction based on the scan prescription with a
user-defined increment.
○
Earliest to Latest (All): A multi-phase reconstruction adapted to the available data
acquired with a user-defined increment.
The manual options, Single Phase and Multi-phase, for defining the reconstruction timing
relative to the cardiac cycle, are only available after the scan has been acquired.
A typical Multi-phase prescription is 70–80% in 5% intervals, which is applied to all available
heart cycles during X-ray ON.
10. In
ECG and Gating
settings, select the mode (Single Phase, Multi-phase, et cetera) and
enter the desired phase(s) for reconstruction.
○
%R displays standard phase percent reconstruction
○
+ms displays absolute millisecond reconstruction
○
-ms displays reverse absolute millisecond reconstruction
11. For Multi-phase, enter the
Start
phase,
End
phase, and
Interval
to reconstruct.
○
The recommended reconstruction phases are 70–80% with a 5% increment.
Revolution CT User Manual
Direction 5480385-1EN, Revision 1
Chapter 13 Cardiac 363
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