Flat panel registration fixture and method of using same

Patent metadata

Field	Value
Publication number	US-12324634-B2
Application number	US-202418594392-A
Country	US
Kind code	B2
Filing date	Mar 4, 2024
Priority date	Dec 20, 2021
Publication date	Jun 10, 2025
Grant date	Jun 10, 2025

Abstract

A registration fixture for use with a surgical navigation system for registration of medical images to a three-dimensional tracking space includes a base frame adapted to be mounted over a flat panel detector of an x-ray medical imaging device, and a side frame having optical tracking markers mounted to the base frame. The base frame includes a first set of radiopaque markers embedded therein in a first predetermined pattern and arranged on a plane, and a second set of radiopaque markers embedded therein in a second predetermined pattern also arranged on another plane, which is spaced from the first set of radiopaque markers. The side frame has a plurality of optical tracking markers and is configured to detachably mount to the base frame without piercing a sterilizing drape to be interposed between the base frame and the side frame.

First claim

What is claimed is:

1. A registration fixture for use with a surgical navigation system for registration of medical images to a three-dimensional tracking space comprising:
a base frame adapted to be detachably mounted over a flat panel detector of an x-ray medical imaging device;
a plurality of tracking markers mounted to the base frame for tracking by a tracking device;
a plate attached to the base frame, the plate having a first set of radiopaque markers embedded therein in a first predetermined pattern and a second set of radiopaque markers embedded therein in a second predetermined pattern different from the first predetermined pattern,
wherein the first set of radiopaque markers are arranged in a first plane, and
the second set of radiopaque markers are arranged in a second plane offset from the first plane.

2. The registration fixture of claim 1 , wherein:
the first set of radiopaque markers include a plurality of non-uniformly arranged markers lying on a first circle.

3. The registration fixture of claim 2 , wherein the first set of radiopaque markers include a plurality of subsets of radiopaque markers with each subset of radiopaque markers and a corresponding marker in the first circle lying on an imaginary line from the center of the first circle.

4. The registration fixture of claim 3 , wherein each subset of radiopaque markers includes at least two radiopaque markers that are positioned outside of the first circle.

5. The registration fixture of claim 4 , wherein the number of radiopaque markers of the first set and the second set is the same.

6. The registration fixture of claim 5 , wherein the number of radiopaque markers of the first set and the second set is each 24.

7. The registration fixture of claim 1 , wherein the plate includes:
an orientation plate having the first set of radiopaque markers embedded therein; and
a registration plate having the second set of radiopaque markers embedded therein, the orientation and registration plates being spaced from and parallel to each other.

8. The registration fixture of claim 7 , wherein the spacing between the orientation plate and the registration plate ranges between 25 mm and 50 mm.

9. The registration fixture of claim 1 , further comprising a side frame adapted to detachably mount to the base frame and to which the plurality of tracking markers are attached.

10. A registration fixture for use with a surgical navigation system for registration of medical images to a three-dimensional tracking space comprising:
a base frame adapted to be detachably mounted over a flat panel detector of an x-ray medical imaging device;
a side frame detachably mounted to the base frame;
a plurality of tracking markers mounted to the side frame for tracking by a tracking device;
a plate attached to the base frame, the plate having a first set of radiopaque markers embedded therein in a first predetermined pattern and lying on a first plane and a second set of radiopaque markers embedded therein in a second predetermined pattern and lying on a second plane spaced from the first plane,
wherein the first set of radiopaque markers are arranged in a first plane, and
the second set of radiopaque markers are arranged in a second plane offset from the first plane.

11. The registration fixture of claim 10 , wherein:
the first set of radiopaque markers include a plurality of non-uniformly arranged markers lying on a first circle.

12. The registration fixture of claim 11 , wherein the first set of radiopaque markers include a plurality of subsets of radiopaque markers with each subset of radiopaque markers and a corresponding marker in the first circle lying on an imaginary line from the center of the first circle.

13. The registration fixture of claim 12 , wherein each subset of radiopaque markers includes at least two radiopaque markers that are positioned outside of the first circle.

14. The registration fixture of claim 13 , wherein the number of radiopaque markers of the first set and the second set is the same.

15. The registration fixture of claim 14 , wherein the number of radiopaque markers of the first set and the second set is each 24.

16. The registration fixture of claim 10 , wherein the plate includes:
an orientation plate having the first set of radiopaque markers embedded therein; and
a registration plate having the second set of radiopaque markers embedded therein, the orientation and registration plates being spaced from and parallel to each other.

17. The registration fixture of claim 16 , wherein the spacing between the orientation plate and the registration plate ranges between 25 mm and 50 mm.

18. The registration fixture of claim 12 , wherein each subset of radiopaque markers includes at least two radiopaque markers that are positioned outside of the first circle and the at least two radiopaque markers lie on an imaginary line that passes through a center of the first circle.

Assignees

• Globus Medical Inc

Inventors

• Krull Alexander
• CALLOWAY Thomas
• Kmiec Rand
• Crawford Neil
• Johnson Norbert
• Pinard Gary

Classifications

• A61B6/547

  involving tracking of position of the device or parts of the device · CPC title

• A61B6/5211

  involving processing of medical diagnostic data · CPC title

• A61B6/4441

  the rigid structure being a C-arm or U-arm · CPC title

• A61B6/4233

  using matrix detectors · CPC title

• A61B2090/3966

  Radiopaque markers visible in an X-ray image · CPC title