Systems and methods for orthosis design

Patent metadata

Field	Value
Publication number	US-11576794-B2
Application number	US-202016829208-A
Country	US
Kind code	B2
Filing date	Mar 25, 2020
Priority date	Jul 2, 2019
Publication date	Feb 14, 2023
Grant date	Feb 14, 2023

Abstract

The present disclosure is related to systems and methods for orthosis design. The method includes obtaining a three-dimensional (3D) model associated with a subject. The method includes obtaining one or more reference images associated with the subject. The method includes determining, based on the 3D model and the one or more reference images, orthosis design data for the subject. The orthosis design data may be used to determine an orthosis for the subject.

First claim

We claim:

1. A method for orthosis design, implemented on a computing device having one or more processors and one or more storage devices, the method comprising:
obtaining a three-dimensional (3D) model associated with a subject;
obtaining one or more 2D reference images associated with the subject;
superimposing the one or more 2D reference images on the 3D model to generate a superimposing result; and
determining orthosis design data for the subject by modifying the 3D model based on the superimposing result, wherein the orthosis design data is used to determine an orthosis for the subject.

2. The method of claim 1 , wherein obtaining a 3D model associated with a subject comprises:
obtaining the 3D model associated with the subject from a 3D camera device.

3. The method of claim 1 , wherein obtaining a 3D model associated with a subject, comprises:
obtaining image data associated with the subject; and
determining the 3D model associated with the subject based on the image data associated with the subject.

4. The method of claim 3 , wherein determining the 3D model associated with the subject based on the image data associated with the subject comprises:
determining a target area by performing an image segmentation operation on the image data associated with the subject;
extracting body surface data associated with the target area from the image data associated with the subject; and
generating a plurality of meshes of the 3D model based on the body surface data associated with the target area.

5. The method of claim 1 , wherein the one or more reference images are digital radiography (DR) images.

6. The method of claim 1 , wherein the orthosis design data for the subject includes a processing result determined by performing at least one of a mesh deformation operation, a mesh smoothing operation, a mesh division operation, or a mesh splitting operation on the 3D model.

7. The method of claim 1 , further comprising:
determining, based on the 3D model and the orthosis design data, force data of at least one region of the subject after wearing an orthosis; and
altering, based on the force data of the at least one region of the subject, the orthosis design data.

8. The method of claim 1 , further comprising:
determining housing design data associated with a housing of the orthosis by performing a thickness-adjustment operation on the orthosis design data.

9. The method of claim 1 , further comprising:
simulating force data generated by a 3D orthosis model on the 3D model of the subject after wearing the 3D orthosis model, wherein the 3D orthosis model is generated based on the orthosis design data; and
altering the orthosis design data based on the force data and an applied force of the 3D orthosis model, wherein the applied force of the 3D orthosis model refers to a force of a pressure region of the orthosis applied on different regions of the subject during correcting of the subject.

10. A method for splitting a 3D model, implemented on a computing device having one or more processors and one or more storage devices, the method comprising:
determining a spline curve associated with a 3D model, wherein the spline curve is generated based on a plurality of first coordinates input by a user in a screen coordinate system, the spline curve includes a plurality of second coordinates in a model coordinate system;
for each second coordinate of the plurality of second coordinates:
determining a center point corresponding to the second coordinate;
determining a link line connecting the center point and the corresponding second coordinate; and
determining a plurality of boundary points along a direction of the link line; and

generating a split surface based on all the boundary points corresponding to the plurality of second coordinates.

11. The method of claim 10 , further comprising:
splitting the 3D model based on the split surface.

12. The method of claim 11 , wherein splitting the 3D model based on the split surface comprises:
generating at least two sub-models by splitting the 3D model based on the split surface; and
displaying the at least two sub-models on a terminal device associated with the user.

13. The method of claim 10 , wherein determining a spline curve associated with a 3D model comprises:
obtaining the plurality of first coordinates input by the user;
determining a plurality of third coordinates by performing a spline interpolation operation on the plurality of first coordinates;
determining the plurality of second coordinates by projecting the plurality of third coordinates on the 3D model; and
determining the spline curve by connecting the plurality of second coordinates.

14. The method of claim 13 , wherein the spline interpolation operation includes at least one of a cubic B-spline interpolation, a Bezier curve interpolation, or a catmull-rom curve interpolation.

15. The method of claim 13 , wherein the plurality of boundary points include an inner boundary point and an outer boundary point, the inner boundary point is located inside the 3D model, the outer boundary point is located outside the 3D model, and for the each second coordinate of the plurality of second coordinates, determining a plurality of boundary points along a direction of the link line comprises:
determining the inner boundary point by extending the second coordinate to the inside of the 3D model along the direction of the link line; and
determining the outer boundary point by extending the second coordinate to the outside of the 3D model along the direction of the link line.

16. The method of claim 15 , wherein generating a split surface based on all the boundary points corresponding to the plurality of second coordinates comprises:
generating a plurality of split sub-surfaces by connecting the inner boundary points and the outer boundary points corresponding to the plurality of second coordinates; and
generating the split surface by combining the plurality of split sub-surfaces.

17. The method of claim 13 , wherein determining the plurality of second coordinates by projecting the plurality of third coordinates on the 3D model comprises:
transforming the plurality of third coordinates in the screen coordinate system to a plurality of fourth coordinates in a view coordinate system;
transforming the plurality of fourth coordinates in the view coordinate system to a plurality of fifth coordinates in a camera coordinate system;
transforming the plurality of fifth coordinates in the camera coordinate system to a plurality of sixth coordinates in a world coordinate system; and
transforming the plurality of sixth coordinates in the world coordinate system to the plurality of second coordinates in the model coordinate system.

18. The method of claim 13 , further comprising:
prior to obtaining the plurality of first coordinates,
obtaining data associated with the 3D model;
determining an initial transformation matrix between the model coordinate system and the world coordinate system, wherein the initial transformation matrix is used to display a front view of the 3D model in the world coordinate system; and
rendering the 3D model based on the data associated with the 3D model and the initial transformation matrix.

19. A system for orthosis design, comprising:
at least one storage device storing a set of instructions; and
at least one processor in communication with the at least one storage device, when executing the stored set of instructions, the at least one processor causes the system to:
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Assignees

• Wuhan United Imaging Healthcare Co Ltd

Inventors

• Gao Jing
• Shen Qiang
• Tang Chao
• Wang Yinglong
• Xie Guodong
• Gan Mingwu
• Huang Yang
• Xia Chao
• Tan Jie

Classifications

• G06T3/4007

  based on interpolation, e.g. bilinear interpolation (image demosaicing G06T3/4015; edge-driven or edge-based scaling G06T3/403) · CPC title

• A61F2002/5049

  Computer aided shaping, e.g. rapid prototyping · CPC title

• A61F2/5046 Primary

  for designing or making customized prostheses, e.g. using templates, finite-element analysis or CAD-CAM techniques · CPC title

• G06T19/20

  Editing of three-dimensional [3D] images, e.g. changing shapes or colours, aligning objects or positioning parts · CPC title

• G06T2210/41

  Medical · CPC title