System Performance - GE Revolution CT User Manual

20 System Performance

Chapter 3 Safety
CAUTION
Upon system startup, when an unrecognized X-ray tube is detected, the system
displays the following notification to the operator: Attention An unrecognized X-
Ray tube has been installed on the system. - GE cannot assure that system
performance will conform to specifications. Advisory messages will be posted to
the operator about an unrecognized tube during tube warm-up, during Fast
Calibration, and in the dose report.
CAUTION
Prior to the start of tube warm-up, when an unrecognized X-ray tube is detected,
the system displays the following notification to the operator: Attention An
unrecognized tube has been installed on the system. Tube Cooling algorithms
are designed specifically for GE tubes and the performance of the system cannot
be guaranteed. Warning Scans may have been taken within the last two hours.
Warmup scans may cause subsequent cooling delays. Note: Tube warmup will
run in Autoscan mode.
WARNING
SCANS MAY HAVE BEEN TAKEN WITHIN THE LAST TWO HOURS.
WARMUP SCANS MAY CAUSE SUBSEQUENT COOLING DELAYS. NOTE:
TUBE WARMUP WILL RUN IN AUTOSCAN MODE.
CAUTION
Prior to the start of fast calibration, when an unrecognized X-ray tube is detected,
the system displays the following notification to the operator: Attention An
unrecognized tube has been installed on the system. Fast Calibration techniques
are designed specifically for GE tubes and GE cannot guarantee that the
performance of the system will meet specifications with an unrecognized tube.
CAUTION
Prior to confirmation of a scan prescription, when an unrecognized X-ray tube is
detected, the system displays the following notification as a part of the pre-scan
dose information to the operator: Unrecognized tube -- Dose not validated by GE.
CAUTION
When an unrecognized X-ray tube is detected, the system displays the following
notification as a part of the post-scan dose report to the operator: Attention
Unrecognized tube in use. The reported dose information is calculated based on
empirical observations of systems with GE tubes. GE cannot assure the
accuracy of reported dose information for any configurations that include tubes
other than GE tubes.
Revolution CT User Manual
Direction 5480385-1EN, Revision 1
97