Patient was placed on table for exam with head at foot end of table.The table suddenly began to move to the upright position.Operator allegedly did not perform any system operation.The table was immediately returned to the horizontal position.The problem did not reoccur and the system could be operated normally thereafter.There were no error log entries on the system corresponding to this event.It was confirmed that all system functions were normal and no abnormalities in the parts related to the tilt switch.It was determined that there were no abnormalities in the system, and therefore the only possible cause was unintended operation of the tilt switch.
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