Three dimensional multibody modeling of anatomical joints

• US 6,161,080 A
• Filed: 11/17/1997
• Issued: 12/12/2000
• Est. Priority Date: 11/17/1997
• Status: Expired due to Term

• Current Assignee: Trustees Of Columbia University In The City Of New York (Columbia University)
• Original Assignee: Trustees Of Columbia University In The City Of New York (Columbia University)
• Inventors: Kwak, S. Daniel, Blankevoort, Leendert, Aouni-Ateshian, Gerard H, Mow, Van C.
• Primary Examiner(s): Stamber, Eric W.
• Assistant Examiner(s): Broda, Samuel
• Application Number:
  US08/972,160
• Time in Patent Office: 1,121 Days
• Field of Search: 395/500.28, 395/500.32, 600/587, 623/11, 703/7, 703/11, 703/2
• US Class Current: 703/11
• CPC Class Codes: A61B 5/4523 Tendons
• CPC Class Codes: A61B 5/4528 Joints A61B5/4533, A61B5/4538 take precedence
• CPC Class Codes: A61B 5/4533 Ligaments
• CPC Class Codes: A61F 2/38 for elbows or knees
• CPC Class Codes: A61F 2/3877 Patellae or trochleae
• CPC Class Codes: A61F 2002/30943 using mathematical models
• CPC Class Codes: A61F 2002/30952 using CAD-CAM techniques or NC-techniques
• CPC Class Codes: G06T 13/40 of characters, e.g. humans, animals or virtual beings
• CPC Class Codes: G06T 19/20 Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts
• CPC Class Codes: G06T 2210/41 Medical
• CPC Class Codes: G06T 2219/2016 Rotation, translation, scaling
• CPC Class Codes: G16H 10/20 for electronic clinical trials or questionnaires
• CPC Class Codes: G16H 50/50 for simulation or modelling of medical disorders

Abstract

The present invention relates to a method of generating a three dimensional representation of one or more anatomical joints, wherein the representation comprises two or more movable bodies and one or more links, comprising the steps of inputting anatomically representative data of two or more movable bodies of the selected joint or joints; selecting one or more link types responsive to the representative data of the bodies; selecting link characteristics responsive to each selected link type; generating an equilibrium condition responsive to interaction between the bodies and the links; and displaying a three dimensional representation of the selected joint or joints responsive to the data generated from the equilibrium condition of the anatomical joint or joints. The present invention further relates to a system for generating a three dimensional representation of one or more anatomical joints, and a method of planning surgery of one or more anatomical joints.

Claims

1. A method of generating a three dimensional representation of an anatomical joint on an output device, wherein said representation comprises two or more movable bodies and one or more links, comprising the steps of:

acquiring anatomically representative data of two or more movable bodies of a selected joint;

selecting one or more link types responsive to said representative data of the bodies;

selecting link characteristics responsive to each selected link type;

generating an equilibrium condition responsive to interaction between the bodies and the one or more links; and

displaying a three dimensional representation on the output device of said anatomical joint responsive to the data generated from the equilibrium condition of said anatomical joint.

3. A method according to claims 1 or 2, wherein the data generated from the equilibrium condition responsive to interaction between the bodies and links predicts the kinematic orientation, the kinematic position, the contact force, and the contact area of the movable bodies and links.

4. A method according to claims 1 or 2, wherein the one or more link types is selected from the group consisting of ligament links, muscle links, tendon-pulley links, wrapping links, torsional spring links, articular contact links, particle contact links, external forces links, and external moments links.

5. A method according to claims 1 or 2, wherein the one or more movable bodies are selected from the group consisting of material bodies or particle bodies.

6. A method according to claims 1 or 2, further comprising the step of constraining one or more degrees of freedom of one or more movable body, prior to the step of selecting link characteristics responsive to each selected link type.

2. A method of generating a three dimensional representation of more than one anatomical joint on an output device, wherein said representation comprises two or more movable bodies and one or more links associated with the selected number of joints, comprising the steps of:

acquiring anatomically representative data of two or more movable bodies of a selected number of joints;

selecting one or more link types responsive to said representative data of the bodies for each of the selected number of joints;

selecting link characteristics responsive to each selected link type;

generating an equilibrium condition responsive to interaction between the bodies and the links; and

displaying a three dimensional representation of said anatomical joints on the output device responsive to the data generated from the equilibrium condition for the selected number of joints.

7. A system for generating a three dimensional representation of an anatomical joint, wherein said representation comprises two or more movable bodies and one or more links, comprising

means for providing a user interface;

means for acquiring anatomically representative data of two or more movable bodies of a selected joint;

means for selecting one or more link types responsive to said representative data of the bodies;

means for selecting link characteristics responsive to each selected link type;

means for generating an equilibrium condition responsive to interaction between the bodies and the one or more links; and

means for displaying a three dimensional representation of said anatomical joint responsive to the data generated from the equilibrium condition of said anatomical joint.

9. A system according to claims 7 or 8, wherein the data generated from the equilibrium condition responsive to interaction between the bodies and links predicts the kinematic orientation, the kinematic position, the contact force, and the contact area of the movable bodies and links.

10. A system according to claims 7 or 8, wherein the one or more link types is selected from the group consisting of ligament links, muscle links, tendon-pulley links, wrapping links, torsional spring links, articular contact links, particle contact links, external forces links, and external moments links.

11. A system according to claims 7 or 8, wherein the one or more movable bodies are selected from the group consisting of material bodies or particle bodies.

12. A system according to claims 7 or 8, further comprising means for constraining one or more degrees of freedom of one or more movable body, prior to selecting link characteristics responsive to each selected link type.

8. A system for generating a three dimensional representation of more than one anatomical joint, wherein said representation comprises two or more movable bodies and one or more links associated with the selected number of joints, comprising

means for providing a user interface;

means for acquiring anatomically representative data of two or more movable bodies of a selected number of joints;

means for selecting one or more link types responsive to said representative data of the bodies for each of the selected number of joints;

means for selecting link characteristics responsive to each selected link type;

means for generating an equilibrium condition responsive to interaction between the bodies and the links; and

means for displaying a three dimensional representation of said anatomical joints responsive to the data generated from the equilibrium condition for the selected number of joints.

13. A method of planning surgery of an anatomical joint comprising the steps of:

acquiring, from a subject for whom surgery is being planned, anatomically representative data of a selected joint having two or more bodies and one or more links;

selecting one or more link types responsive to said representative data of the bodies;

selecting link characteristics responsive to each selected link type;

generating an equilibrium condition responsive to interaction between the bodies and the one or more links; and

displaying a three dimensional representation on an output device for planning surgery of said anatomical joint responsive to the data generated from the equilibrium condition of said anatomical joint.