Abstract:AIM:To analyse the cause of image-drifting and to resolve it during image-guidance endoscopic nasocular operation.METHODS:The pre-operative plan and intra-operative navigation were rigorously processed according to the criteria of endoscopic nasocular operation.The occurrence of image-drifting was recorded,analyzed and resolved.RESULTS:The image-guidance system in endoscopic nasocular operation was used in 13 cases from August 2008 to December 2010,and image-drifting happened in 4 cases(31%).Among them,2 cases were systemic image-drifting,2 cases were structural image-drifting.Systemic image-drifting were resolved,while structural image-drifting were not resolved.But the operation was completed smoothly.CONCLUSION:The systemic image-drifting can be prevented through rigorous neuronavigative procedure,and it could be resolved by selecting a better landmark and adding more landmarks.The best way to prevent structural image-drifting is careful operation.
