Patent ID: 7217276

Claim:
An image guided surgery system for use in image guided surgery, comprising: an instrument guide unit operable to guide a surgical instrument into a body of a patient, said instrument guide unit including, an instrument guide operable to guide a surgical instrument into the body of the patient, said instrument guide including a first set of tracking elements, a base unit operable to be secured to the body in an area in which surgery is to occur, said base unit being coupled to said instrument guide and having a second set of tracking elements, and an adjustment mechanism operably connecting said base unit and said instrument guide as a unit that is operable to adjust said instrument guide relative to said base unit; a tracking device operable to track said first set of tracking elements associated with said instrument guide and said second set of tracking elements associated with said base unit; a computer system operable to determine a location of said base unit and an orientation of said instrument guide by use of said first and second sets of tracking elements; and a display operable to display representations of the area in which surgery is to occur and a trajectory line defined by an orientation of said instrument guide relative to said base unit.