Stereotactic frame and localization method
First Claim
1. A method of stereotactic localization of a target point in a patient'"'"'s head comprising the steps of:
- a. establishing a first orbitomeatal line on a first side of a patient'"'"'s head, said first orbitomeatal line extending from a first orbital ridge to a center point of a first external auditory meatus;
b. establishing a second orbitomeatal line on a second side of said patient'"'"'s head, said second orbitomeatal line extending from a second orbital ridge to a center point of a second external auditory meatus;
c. establishing an orbitomeatal plane, said orbitomeatal plane formed by connecting said first orbitomeatal line and said second orbitomeatal line;
d. establishing a central axis in said orbitomeatal plane, said central axis formed by connecting said center points of said first external auditory meatus and said second external auditory meatus;
e. establishing a vertical plane perpendicularly intersecting said orbitomeatal plane along said central axis;
f. using said orbitomeatal plane, said vertical plane, and said central axis to form a spherical coordinate system to locate said target point in said patient'"'"'s head.
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Accused Products
Abstract
Applicant'"'"'s invention is a stereotactic frame and localization method incorporating localization frames which is operable without the use of head pins or screws. Initially, using the localization frames, natural reference points, lines, and planes are established and aligned in relation to a patient'"'"'s head. These natural references provide cranial landmarks for proper attachment and alignment of the stereotactic frame. This stereotactic frame includes a means for positioning and locking the frame as well a multiplicity of adjustable elements which are adjusted according to the determined values of the variables such that localization of a target point within a patient'"'"'s head is possible.
102 Citations
31 Claims
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1. A method of stereotactic localization of a target point in a patient'"'"'s head comprising the steps of:
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a. establishing a first orbitomeatal line on a first side of a patient'"'"'s head, said first orbitomeatal line extending from a first orbital ridge to a center point of a first external auditory meatus; b. establishing a second orbitomeatal line on a second side of said patient'"'"'s head, said second orbitomeatal line extending from a second orbital ridge to a center point of a second external auditory meatus; c. establishing an orbitomeatal plane, said orbitomeatal plane formed by connecting said first orbitomeatal line and said second orbitomeatal line; d. establishing a central axis in said orbitomeatal plane, said central axis formed by connecting said center points of said first external auditory meatus and said second external auditory meatus; e. establishing a vertical plane perpendicularly intersecting said orbitomeatal plane along said central axis; f. using said orbitomeatal plane, said vertical plane, and said central axis to form a spherical coordinate system to locate said target point in said patient'"'"'s head. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of stereotactic localization of a target point in a patient'"'"'s head, said patient'"'"'s head supported by a head frame during surgery, comprising the steps of:
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a. positioning a localization frame on a patient'"'"'s head such that a first side member of said localization frame establishes a first orbitomeatal line on a first side of said patient'"'"'s head, said first orbitomeatal line extending from a first orbital ridge to a center point of a first external auditory meatus and a second side member of said localization frame establishes a second orbitomeatal line on a second side of said patient'"'"'s head, said second orbitomeatal line extending from a second orbital ridge to a center point of a second external auditory meatus; b. establishing an orbitomeatal plane by connecting said first orbitomeatal line and said second orbitomeatal line; c. establishing a central axis in said orbitomeatal plane by connecting said center points of said first external auditory meatus and said second external auditory meatus; d. establishing a vertical plane perpendicularly intersecting said orbitomeatal plane along said central axis; e. attaching a stereotactic frame to said head frame; f. determining variable values for location of a target point within said patient'"'"'s head; and g. locating said target point. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification