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 caliper for determining a dimension of an object, comprising:
a base having a known base length; at least one arm pivotally mounted to an end of the base, the arm having a known arm length, and having a free end used to identify a limit point of the object to measure; an inertial sensor unit secured to the at least one arm, the inertial sensor unit producing orientation data pertaining to at least one degree of freedom in orientation of the arm in a plane in which the at least one arm and the base lie; whereby the dimension between limit points is calculated from the known base length and the arm length and from the orientation data of the at least one arm relative to the base.