Bone and tool tracking with optical waveguide modeling system in computer-assisted surgery using patient-attached multicore optical fiber

A method for tracking a patient in a coordinate system of a surgical tool using an optical waveguide modeling system, the optical waveguide modeling system having at least one multicore optical fiber with at least one portion attached to the surgical tool and at least one portion attached to the patient, the method comprising:

• using a controller,
• receiving a patient model representing a shape and orientation of at least one of a limb and a bone of the patient;
• generating a waveguide model representing a shape and orientation of the multicore optical fiber as attached to the surgical tool and to the patient;
• and
• tracking the patient model in the coordinate system of the surgical tool by registering the patient model in the coordinate system of the surgical tool using the waveguide model, a known spatial relationship between the surgical tool and the at least one portion of the multicore optical fiber attached to the surgical tool and a known spatial relationship between the patient and the at least one portion of the multicore optical fiber attached to the patient.