Modeling method and apparatus for use in surgical navigation
First Claim
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1. A method of modeling a bone during a surgical navigation procedure, comprising:
- providing a tracking system and a modeling instrument detectable by the tracking system;
acquiring up to nine predefined points from a bone with the modeling instrument, the acquired points being used to generate a representative model of the bone;
associating the representative model of the bone with a reference bone model from a computer database associated with the tracking system;
warping the reference bone model to at least coincide with the representative model of the bone at the locations of the acquired predefined points;
displaying a three-dimensional and manipulatable image of the warped reference bone model, the image showing the acquired predefined points;
intra-operatively manipulating the image of the warped reference bone model to calculate a bone cut or to determine surgical information for performing the surgical procedure, the surgical information including gap analysis data, resection plane details and bone alignment angles; and
wherein the displayed warped reference bone model accurately represents the location of the patient'"'"'s bone in real time in at least the locations of the acquired predefined points.
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Abstract
A modeling method for use in surgical navigation is provided. The method acquires a finite number of pre-defined points from a patient'"'"'s bone and registers the points with a surgical navigation system. The navigation system generates and displays a three-dimensional image of a warped bone model that is manipulatable and accurate in at least the locations of the points taken and can be used to calculate the locations of bone cuts, implant positions and sizes, as well as display all of this information on the three-dimensional warped model.
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Citations
14 Claims
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1. A method of modeling a bone during a surgical navigation procedure, comprising:
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providing a tracking system and a modeling instrument detectable by the tracking system; acquiring up to nine predefined points from a bone with the modeling instrument, the acquired points being used to generate a representative model of the bone; associating the representative model of the bone with a reference bone model from a computer database associated with the tracking system; warping the reference bone model to at least coincide with the representative model of the bone at the locations of the acquired predefined points; displaying a three-dimensional and manipulatable image of the warped reference bone model, the image showing the acquired predefined points; intra-operatively manipulating the image of the warped reference bone model to calculate a bone cut or to determine surgical information for performing the surgical procedure, the surgical information including gap analysis data, resection plane details and bone alignment angles; and wherein the displayed warped reference bone model accurately represents the location of the patient'"'"'s bone in real time in at least the locations of the acquired predefined points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 13)
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9. An image guided surgery system, comprising:
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a tracking system having a measurement field; a modeling instrument detectable by the tracking system when exposed to the measurement field; means for generating a representative model of a bone while the modeling instrument acquires up to nine predefined points from the bone; means for associating the representative model of the bone with a reference bone model contained within a computer database that is associated with the tracking system; means for warping the reference bone model to at least coincide with the representative bone model at the locations of the acquired predefined points; means for displaying a three-dimensional and manipulatable image of the warped reference bone model, the image accurately showing the location of the patient'"'"'s bone in real time in at least the locations of the acquired predefined points; and means for intra-operatively manipulating the image of the warped reference bone model to calculate a bone cut or to determine surgical information for performing a surgical procedure, the surgical information including gap analysis data, resection plane details and bone alignment angles. - View Dependent Claims (10, 11, 12, 14)
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Specification