Apparatus and method for registering a bone of a patient with a computer assisted orthopaedic surgery system
First Claim
1. An apparatus for registering a bone of a patient with a computer assisted orthopaedic surgery system, the apparatus comprising:
- a support frame;
a first housing coupled to the support frame and movable with respect to the support frame;
a first circuit located in the first housing, the first circuit being configured to sense a magnetic field of a first magnetic source and determine a position of the first magnetic source relative to the first circuit;
a second housing coupled to the support frame and movable with respect to the frame; and
a second circuit located in the second housing, the second circuit being configured to sense a magnetic field of a second magnetic source and determine a position of the second magnetic source relative to the second circuit.
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Accused Products
Abstract
An apparatus and method for registering a bone of a patient with a computer assisted surgery system includes a support frame and a number of magnetic sensor arrays movably coupled to the support frame. Each of the magnetic sensor arrays may be pivoted and translated with respect to the frame. In addition, each of the magnetic sensor arrays may include a circuit for sensing a magnetic field generated by a magnetic source coupled to the bone of the patient. Each circuit may include one or more magnetic sensors, a processing circuit, an angle sensor, a distance sensor, and a transmitter. The magnetic sensors and processing circuit cooperate to determine a position of the magnetic source. The angle sensor, distance sensor, and processing circuit cooperate to determine a displacement of the magnetic sensor array from a reference point. The processing circuit controls the transmitter to transmit data indicative of the position of the magnetic source.
140 Citations
38 Claims
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1. An apparatus for registering a bone of a patient with a computer assisted orthopaedic surgery system, the apparatus comprising:
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a support frame;
a first housing coupled to the support frame and movable with respect to the support frame;
a first circuit located in the first housing, the first circuit being configured to sense a magnetic field of a first magnetic source and determine a position of the first magnetic source relative to the first circuit;
a second housing coupled to the support frame and movable with respect to the frame; and
a second circuit located in the second housing, the second circuit being configured to sense a magnetic field of a second magnetic source and determine a position of the second magnetic source relative to the second circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of registering a bony anatomy of a patient with a computer assisted orthopaedic surgery system, the method comprising:
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coupling a first magnetic source and a second magnetic source to the bony anatomy of the patient;
positioning a first magnetic sensor array in a magnetic field of the first magnetic source;
positioning a second magnetic sensor array in a magnetic field of the second magnetic source;
determining first position data indicative of the position of the first magnetic source relative to the first magnetic sensor array and second position data indicative of the position of the second magnetic source relative to the second magnetic sensor array;
determining a first distance of translation of the first magnetic sensor array with respect to a reference point and a second distance of translation of the second magnetic sensor array with respect to the reference point;
determining a first angle between the first magnetic sensor array and a reference axis and a second angle between the second magnetic sensor array and the reference axis; and
transmitting the first and second position data, the first and second distances, and the first and second angles to a computer. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method of registering a bony anatomy of a patient with a computer assisted orthopaedic surgery system, the method comprising:
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coupling a first magnetic source to the bony anatomy;
coupling a second magnetic source to the bony anatomy at an angle relative to the first magnetic source and at a distance from the first magnetic source such that a first magnetic field generated by the first magnetic source and a second magnetic field generated by the second magnetic source do not substantially interfere with each other;
determining a first position of the first magnetic source using a first magnetic sensor array;
determining a second position of the second magnetic source using a second magnetic sensor array;
determining a third position of the first magnetic sensor array relative to a reference point;
determining a fourth position of the second magnetic sensor array relative to the reference point; and
creating a graphically rendered image of the bony anatomy based on the first, second, third, and fourth positions.
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Specification