| 摘要 |
PROBLEM TO BE SOLVED: To provide a localization system capable of aiding a practitioner in restoring a reference catheter to its initial location by detecting a dislodgement, generating an appropriate signal (e.g., an audible or visual warning) and providing guidance when a navigational reference becomes dislodged.SOLUTION: A method of detecting dislodgement of a navigational reference for a localization system includes securing a reference catheter 29, including at least one reference localization element, at an initial reference position within a localization field. The positions of one or more of the reference localization elements are monitored for a perceived displacement that suggests that the reference catheter 29 has become dislodged from the initial reference location. The direction of this perceived displacement is then analyzed to determine whether the reference catheter 29 has actually become dislodged and if so, an appropriate signal (e.g., an audible or visual warning) is generated and guidance may be provided to aid the practitioner in restoring the reference catheter 29 to its initial location. |
