Method and apparatus for calibrating non-linear instruments
First Claim
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1. A system to navigate an instrument relative to a portion of a patient'"'"'s anatomy, comprising:
- an instrument including an engaging end, a working end, and a non-linear shaft extending between said engaging end and said working end;
a member selectively engageable to said engaging end such that said member is operable to be engaged and disengaged from said engaging end;
a first tracking sensor interconnected with said instrument at said working end of said shaft; and
a tracking system configured to track said first tracking sensor;
wherein said tracking system comprises a processor configured to determine an orientation of said member relative to said first tracking sensor when said member is engaged to said engaging end by;
determining at least three points on a portion of said member;
determining a plane of the first member based at least in part upon the determined three points;
confirming the accuracy of the determined plane by;
determining a fourth point on the portion of the first member that should be on the determined plane; and
determining whether the fourth point is on the determined plane;
wherein said engaging end defines a first axis that is non-coaxial with a second axis defined by said working end such that said first tracking sensor is connected to the working end of the shaft that is non-coaxial and non-linear with said engaging end.
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Abstract
A method and apparatus for performing a calibration and navigation of a member. The member may be calibrated relative to a selected portion, such as a sensor on an instrument. The calibrated member may then be navigated with a selected system. The calibration technique can be infinitely flexible and not rigid or designed for specific components. Moreover, the calibration may occur when the member is interconnected to an end of the instrument that is non-co-axial with another end of the instrument.
659 Citations
60 Claims
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1. A system to navigate an instrument relative to a portion of a patient'"'"'s anatomy, comprising:
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an instrument including an engaging end, a working end, and a non-linear shaft extending between said engaging end and said working end; a member selectively engageable to said engaging end such that said member is operable to be engaged and disengaged from said engaging end; a first tracking sensor interconnected with said instrument at said working end of said shaft; and a tracking system configured to track said first tracking sensor; wherein said tracking system comprises a processor configured to determine an orientation of said member relative to said first tracking sensor when said member is engaged to said engaging end by; determining at least three points on a portion of said member; determining a plane of the first member based at least in part upon the determined three points; confirming the accuracy of the determined plane by; determining a fourth point on the portion of the first member that should be on the determined plane; and determining whether the fourth point is on the determined plane; wherein said engaging end defines a first axis that is non-coaxial with a second axis defined by said working end such that said first tracking sensor is connected to the working end of the shaft that is non-coaxial and non-linear with said engaging end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of determining a position of a first member relative to an instrument, comprising:
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interconnecting a first tracking sensor with the instrument; interconnecting the first member with the instrument; determining at least three points on a portion of said member; determining a plane of the first member based at least in part upon the determined three points; confirming the accuracy of the determined plane by; determining a fourth point on the portion of the first member that should be on the determined plane; and determining whether the fourth point is on the determined plane; and determining a vector of the first member through the plane. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A method of navigating a member relative to an anatomy of a patient, comprising:
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interconnecting a first tracking sensor with an instrument; interconnecting a member with the instrument; tracking a probe to determine at least three points defined by the member to define a plane; confirming the accuracy of the defined plane by tracking a probe to determine a fourth point on the member that should be on the defined plane and determining whether the fourth point is on the defined plane; tracking a probe to determine a fifth point to define a vector through the plane relative to the member; displaying the plane and the vector; and navigating the member relative to the anatomy based at least in part on the displayed plane and vector. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
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59. A method of determining a position of a first member relative to a first tracking sensor on an instrument, comprising:
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interconnecting the first tracking sensor with the instrument; interconnecting the first member with the instrument; obtaining a two dimensional image data of the first member along at least two axes of the first member; transforming the two dimensional data into a three dimensional geometry data of the first member with a processor; determining a plane of the first member and determining a vector of the first member from the three dimensional transformation geometry data; confirming accuracy of the determined plane by; determining a point on the portion of said first member that should be on the determined plane; and determining whether the point is on the determined plane; and determining a position of the first member relative to the first tracking sensor on the instrument. - View Dependent Claims (60)
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Specification