METHOD AND SYSTEM FOR PLANNING/GUIDING ALTERATIONS TO A BONE

摘要

A computer-assisted surgery system for guiding alterations to a bone, comprises a trackable member secured to the bone. The trackable member has a first inertial sensor unit producing orientation-based data. A positioning block is secured to the bone, and is adjustable once the positioning block is secured to the bone to be used to guide tools in altering the bone. The positioning block has a second inertial sensor unit producing orientation-based data. A processing system providing an orientation reference associating the bone to the trackable member comprises a signal interpreter for determining an orientation of the trackable member and of the positioning block. A parameter calculator calculates alteration parameters related to an actual orientation of the positioning block with respect to the bone.

主权项

1. A computer-assisted surgery system for at least one of planning and guiding an alteration to a bone in surgery, the computer-assisted surgery system comprising:
a positioning block adapted to be secured to the bone, the positioning block having an inertial sensor unit producing orientation-based data for at least two degrees of freedom in orientation of the positioning block, at least one joint being provided between the bone and the inertial sensor unit in the positioning block such that at least an orientation of the positioning block is adjustable once the positioning block is secured to the bone, to reach a desired orientation at which the positioning block is used to guide at least one tool in altering the bone; a processing system providing an orientation reference related to the bone from the orientation-based data of the positioning block, the processing system comprising:
a signal interpreter for determining an orientation of the positioning block from the orientation-based data; anda parameter calculator for calculating alteration parameters related to an actual orientation of the positioning block with respect to the bone as a function of the orientation reference and of the orientation of the positioning block.