GE Revolution CT - Set Inter Scan Delay Time

NOTE: The minimum Prep Delay may be affected by parameter choices: SFOV, Rotation
Time, Pitch, and Start Location prescribed relative to the prior group. The system
updates the group delay in the Scan Settings window to meet system requirements.
Please check the system message bar on the right monitor before scanning.
1. From the
Scan Settings window, click Timing .
2. From the
Timing collection, click Prep/Group Delay .
3.
Type a scan delay time (in seconds).
NOTE:
The system starts to acquire the scan after you press <Start Scan> and the Prep
Delay time counts down to zero.
Start the injection at the same time as starting the scan to ensure accuracy when the
intravenous (IV) bolus arrives in the appropriate anatomy.
The Prep Delay will be set to zero when resuming a scan after <Stop Scan> or
<Pause Scan> is selected during the Prep Delay countdown.
5.2.2 Set Inter Scan Delay time
Inter Scan Delay (ISD) allows time for the table to move the correct amount of millimeters set for
the Image Interval. It can also be used for tube cooling by extending the time between
exposures and allowing time for heat to dissipate.
Follow these steps to set an Inter Scan Delay time for an Axial scan prescription.
NOTE:
ISD is available for Axial scans only.
1.
From the
Scan Settings window, click Timing .
2.
From the
Timing collection, click Inter Scan Delay .
3.
Type a scan delay time (in seconds) between each Axial scan.
○
The value is dependant on the detector coverage selected when One or More is
selected.
○
When the scan interval is zero, the value is set by the system based on the selected
Rotation Time and Minimum Time Between Passes .
○
The valid range is 1 to 300 seconds.
○
Typically, the ISD is set at 1 to 1.7 seconds so the exam is done as quickly as possible.
Revolution CT User Manual
Direction 5480385-1EN, Revision 1
288 5 Timing Parameters