Method and System for Associating Pre-Operative Plan with Position Data of Surgical Instrument

A system for associating a pre-operative plan with position and orientation of a surgical instrument in a surgical navigation system, comprising

• a surgical navigation module configured to generate a preoperative plan with a virtual representation of patient anatomy data;
• and
• a navigation system comprising at least one tracker attachable to an instrument to be tracked, and a localizer for tracking at least one of position and orientation of said at least one tracker;
• wherein
• the at least one tracker comprises a position transmitter and a tracker interface for attaching the at least one tracker to said instrument;
• the navigation system is arranged to report tracking data comprising position and orientation of the tracker to the surgical navigation module;
• and
• the surgical navigation module is configured to generate tracked position and orientation of the surgical instrument as virtual representations of the surgical instrument relative virtual representations of pre-operative plan in separate parts of a split window depending on said tracking data.