Method and system for tracking objects in computer-assisted surgery
AssigneeOrthosoft Inc.
InventorsFrancois Paradis, Joel Zuhars, Karine Duval, Mathieu Chevrier
Life of this patent
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Abstract
A computer-assisted surgery system comprises instruments adapted to be used to perform tasks related to surgery. A reference device is in a fixed relation to a bone. A rotating magnet creates a magnetic field plane, the rotating magnet being connected to one of the instrument and the reference device. A magnetometer on the other of the instrument and the reference device produces signals as a function of at least its orientation relative to the magnetic field plane. A processing unit tracks said orientation of the instrument relative to the bone using said signals from the magnetometer subjected to the magnetic field plane.
Claims11
A method for tracking at least one instrument relative to a bone in computer-assisted surgery comprising:
- tracking, using one or more processors of a computer-assisted surgery system, a reference orientation of the bone in three axes with a reference device connected to the bone;
- creating a magnetic field plane by rotating a magnet connected to one of the instrument and the bone;
- using a magnetometer being mounted to the other of the instrument and the bone, producing signals as a function of at least an orientation of the magnetometer relative to the magnetic field plane;
- and
- tracking and outputting, using one or more processors of a computer-assisted surgery system, an orientation of the instrument relative to the three axes of the reference orientation of the bone using said signals from the magnetometer subjected to the magnetic field plane, as the instrument is moved relative to the bone.
Dependencies are inferred from the claim text.