Method and system for geometric distortion free tracking of 3-dimensional objects from 2-dimensional measurements
First Claim
1. A method for improved tracking of an internal object, said method comprising:
- obtaining a plurality of identifying features for said internal object from a plurality of projection views, wherein said internal object comprises at least one of an implant and a part of an anatomy;
obtaining a plurality of measurements for said internal object from said plurality of projection views using said plurality of identifying features; and
forming a three-dimensional model of said internal object using said plurality of measurements for use in tracking said internal object.
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Abstract
Certain embodiments of the present invention provide a method and system for improved tracking of an internal object, such as an implant or part of the anatomy, during an image-guided operation. In an embodiment, the method may include obtaining a plurality of fiducials for an internal object from a plurality of projection views, obtaining a plurality of measurements for the internal object using the plurality of fiducials, forming a three-dimensional model of the internal object using the plurality of measurements from a plurality of projection views for use in tracking the internal object, and performing an image-guided operation using an image data set and a three-dimensional representation of the internal object. The fiducials may be indentations, curves, grooves and/or identifying features in the internal object. In an embodiment, the representation of the internal object is compared to a computer-generated model of the internal object.
97 Citations
20 Claims
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1. A method for improved tracking of an internal object, said method comprising:
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obtaining a plurality of identifying features for said internal object from a plurality of projection views, wherein said internal object comprises at least one of an implant and a part of an anatomy;
obtaining a plurality of measurements for said internal object from said plurality of projection views using said plurality of identifying features; and
forming a three-dimensional model of said internal object using said plurality of measurements for use in tracking said internal object. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for improved tracking of an implant, said system comprising:
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an implant, said implant tracked with respect to a reference three-dimensional coordinate system;
at least one of a plurality of fiducials placed on said implant and a plurality of fiducials located using an image of said implant, wherein both of said pluralities of fiducials enable measurement of said implant;
a sensor for measuring said implant, said sensor capable of being positioned with respect to one or more of said fiducials for measurement of one or more locations on said implant; and
a tracking system for measuring one or more locations on said implant using said sensor and said plurality of fiducials and a plurality of projection views to form a three-dimensional model of said implant. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A system for improved tracking of an internal object, said system comprising:
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an internal object, wherein said internal object comprises at least one of an implant and a part of an anatomy, said internal object tracked with respect to a reference three-dimensional coordinate system;
a plurality of projection views of said internal object;
a plurality of images taken from said projection views of said internal object;
a plurality of at least one of identifying features and fiducials on said internal object identified in said images, said plurality of at least one of identifying features and fiducials enabling measurement of said internal object;
a tracking system for measuring one or more locations on said internal object using said images, said plurality of at least one of identifying features and fiducials and a plurality of projection views to form a three-dimensional model of said internal object. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification