Investigation revealed there was no system malfunction.The imaging provided of the l2 preoperative merge revealed that the ap and lateral views contained shifts between the ct and fluoro images.Preoperative merges containing shifts can cause navigational integrity issues and can lead to the misplacement of screws.Additionally, review of the logs revealed that the user did not active the surveillance marker until they proceeded to the first trajectory (l2-r).Before proceeding with navigation, the user acknowledges that they will perform an anatomical landmark check to ensure navigational integrity.Additionally, the user acknowledges that the use of a surveillance marker can reduce registration shifts before proceeding with navigation.The cause of the reported issue was traced to user technique.
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