GE Revolution CT - Graphically Adjust Reconstruction Timing; Method 1; Method 1 and 2; Method 2

Number Description
2 Secondary reconstructions parameters are displayed: start phase, end phase, and interval.
3
The trigger point on the ECG Trace for each R-peak is displayed, as well as the X-ray on interval, and
the image reconstruction timing when images will be generated.
4 Click the [Save] icon to save your modified trigger locations with exam information.
5 Click the [Restore] icon to restore the original ECG Trace information for the acquisition.
6
Click the [Measure] icon to measure, in msec, the distance between two defined points on the wave‐
form. Place the cursor on the trace and click and drag right or left.
7 Click the [Magnify] icon or the [Minimize] icon to magnify or minimize the ECG waveform.
8 Click and drag the navigation bar to view the selected portion of the waveform.
6.6 Graphically adjust reconstruction timing
Use this procedure to move or reposition image reconstruction timing within a single heart cycle.
6.6.1 Method 1
Place the cursor over the recon location and click, drag, and drop to the new location.
The annotation in the reconstruction location indicates the % or ms where images will be
reconstructed.
6.6.2 Method 2
1. Place the cursor over the recon window you wish to move, and right-click Adjust Recon
Timing .
2.
Type and enter the location as + or - milliseconds.
The recon timing for selected heart cycle moves to the new location.
3. Click [OK].
6.6.3 Method 1 and 2
For all cardiac scan types, the recon window cannot be moved outside of its current X-ray on
interval.
6.7 Insert, delete, or move an R-peak trigger
Use this procedure if gating issues occur during the scan or if the system does not trigger
accurately at the R-peak of the ECG trace.
•
Insert, remove, or move a trigger to normalize a heart cycle when a trigger occurs at an
unwanted location. This can be due to abnormal ECG waveform patterns, external noise
interference, or a low amplitude trace.
•
Remove an image reconstruction location from one or more heart cycles to improve image
quality when an arrhythmia is present in the scan.
1. Open a prior ECG-gated scan series in the Reconstruction and Image Processing area on
the image monitor.
2. To insert a trigger, place the cursor anywhere on the ECG trace where you want to insert it
and right-click Insert R-peak Trigger .
Revolution CT User Manual
Direction 5480385-1EN, Revision 1
Chapter 13 Cardiac 365