Preoperatively planning an arthroplasty procedure and generating a corresponding patient specific arthroplasty resection guide

Patent metadata

Field	Value
Publication number	US-10993744-B2
Application number	US-202017018777-A
Country	US
Kind code	B2
Filing date	Sep 11, 2020
Priority date	Dec 18, 2007
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

A method of planning an arthroplasty procedure on a femur and tibia of a patient. The method includes receiving a first two-dimensional image of the femur and the tibia, and identifying, in the first two-dimensional image, a proximal femur feature, a distal tibia feature, and a bone contour. The method further includes running a transformation process to align a bone model representative of the femur and the tibia into a coordinate system with the first two-dimensional image, the bone model having a bone model contour that is aligned with the bone contour of the femur and the tibia in the first two-dimensional image. And the method further includes applying an implant model to the bone model in order to determine coordinate locations for the arthroplasty resection.

First claim

We claim:

1. A method of planning an arthroplasty procedure on a femur and tibia of a patient, a knee center being between the femur and tibia, the method comprising:
receiving a first two-dimensional image of the femur and the tibia;
identifying, in the first two-dimensional image, a proximal femur feature, a distal tibia feature, and a bone contour;
running a transformation process to align a bone model representative of the femur and the tibia into a coordinate system with the first two-dimensional image, the bone model having a bone model contour that is aligned with the bone contour of the femur and the tibia in the first two-dimensional image; and
applying an implant model to the bone model in order to determine coordinate locations for the arthroplasty resection.

2. The method of claim 1 , wherein the proximal femur feature is a femoral head center point.

3. The method of claim 1 , wherein the distal tibia feature is an ankle center point.

4. The method of claim 1 , wherein the bone model contour is aligned with the bone contour via matching of image intensity variations.

5. The method of claim 1 , wherein the bone model contour is aligned with the bone contour at a distal end of the femur.

6. The method of claim 1 , wherein the bone model contour is aligned with the bone contour at a proximal end of the tibia.

7. The method of claim 1 , further comprising identifying, in the first two-dimensional image, a knee center point.

8. The method of claim 1 , wherein the bone model contour is aligned with the bone contour in at least one or both of a coronal view and a sagittal view.

9. The method of claim 1 , further comprising receiving a second two-dimensional image of the femur and tibia, the first and second two-dimensional images being different from each other in at least one aspect.

10. The method of claim 9 , wherein the first and second two-dimensional images are the result of separate imaging scans.

11. A method of planning an arthroplasty procedure on a femur and tibia of a patient, the patient having a knee region, the method comprising:
receiving a first two-dimensional image of the femur and the tibia;
identifying, in the first two-dimensional image, a proximal femur feature, a distal tibia feature, and a bone contour at the knee region;
importing the first two-dimensional image and a golden template into a common coordinate system, the golden template being associated with an exemplary bone;
deforming the golden template such that a bone contour line of the golden template aligns with the bone contour from the first two-dimensional image;
applying an implant model to the bone model in order to determine coordinate locations for the arthroplasty resection.

12. The method of claim 11 , wherein the bone contour line of the golden template is aligned with the bone contour from the first two-dimensional image via matching of image intensities.

13. The method of claim 11 , wherein the golden template is a three-dimensional mesh.

14. The method of claim 11 , wherein the proximal femur feature is a femoral head center point.

15. The method of claim 11 , wherein the distal tibia feature is an ankle center point.

16. The method of claim 11 , wherein the bone contour line of the golden template is aligned with the bone contour from the first two-dimensional image at a distal end of the femur.

17. The method of claim 11 , wherein the bone contour line of the golden template is aligned with the bone contour from the first two-dimensional image at a proximal end of the tibia.

18. The method of claim 11 , wherein the bone contour line of the golden template is aligned with the bone contour from the first two-dimensional image in at least one or both of a coronal view and a sagittal view.

19. The method of claim 11 , further comprising receiving a second two-dimensional image of the femur and tibia, the first and second two-dimensional images being different from each other in at least one aspect.

20. The method of claim 19 , wherein the first and second two-dimensional images are the result of separate imaging scans.

21. A method of creating a three-dimensional implant plan with the use of two-dimensional images for an arthroplasty procedure on a knee region of a patient, the knee region including a femur and a tibia, the method comprising:
receiving a first two-dimensional image of the femur and the tibia;
identifying, in the first two-dimensional image, a proximal femur feature, a distal tibia feature, and a bone contour;
running a transformation process to align a three-dimensional bone model representative of the femur and the tibia into a coordinate system with the first two-dimensional image, the three-dimensional bone model having a two-dimensional bone model contour that is aligned with the bone contour of the femur and the tibia in the first two-dimensional image; and
aligning a three-dimensional model of an implant to the three-dimensional bone model to create an arthroplasty resection plan.

22. The method of claim 21 , wherein the proximal femur feature is a femoral head center point.

23. The method of claim 21 , wherein the distal tibia feature is an ankle center point.

24. The method of claim 21 , wherein the two-dimensional bone model contour is aligned with the bone contour via matching of image intensity variations.

25. The method of claim 21 , wherein the two-dimensional bone model contour is aligned with the bone contour at a distal end of the femur.

26. The method of claim 21 , wherein the two-dimensional bone model contour is aligned with the bone contour at a proximal end of the tibia.

27. The method of claim 21 , further comprising identifying, in the first two-dimensional image, a knee center point.

28. The method of claim 21 , wherein the two-dimensional bone model contour is aligned with the bone contour in at least one or both of a coronal view and a sagittal view.

29. The method of claim 21 , further comprising receiving a second two-dimensional image of the femur and tibia, the first and second two-dimensional images being different from each other in at least one aspect.

30. The method of claim 29 , wherein the first and second two-dimensional images are the result of separate imaging scans.

Assignees

• Howmedica Osteonics Corp

Inventors

• Park Ilwhan
• Song keun
• Mishin Oleg
• Santarella Michael
• Pavlovskaia Elena I
• Shpungin Boris E

Classifications

• A61B5/055

  involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging · CPC title

• A61B17/7013 Primary

  the shape of the element being adjustable before use (adjustable length plates A61B17/7014) · CPC title

• G06V10/454

  Integrating the filters into a hierarchical structure, e.g. convolutional neural networks [CNN] · CPC title

• A61B34/10 Primary

  Computer-aided planning, simulation or modelling of surgical operations · CPC title

• G06V2201/033

  of skeletal patterns · CPC title