Multi-layer flat coil magnetic transmitters

Patent metadata

Field	Value
Publication number	US-11744479-B2
Application number	US-201716461283-A
Country	US
Kind code	B2
Filing date	Dec 13, 2017
Priority date	Dec 13, 2016
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

A magnetic field generator assembly is configured to be associated with a table supporting a body. The magnetic field generator comprises a plurality of magnetic field transmitters, each comprising interlacing layers of conductive material, configured to provide increased magnetic strength and minimal fluoroscopic occlusion. The interlacing layers of conductive material can be arranged in rectangular spiral formations.

First claim

What is claimed is:

1. A magnetic field generating assembly, configured to be associated with a table supporting a body, the assembly comprising:
a first plurality of elongate conductive elements arranged in a first plane, wherein each of the first plurality of elongate conductive element winds around a first central axis, extending perpendicular to the first plane, in a first spiral formation; and
a second plurality of elongate conductive elements arranged in a second plane, the second plane being substantially parallel to the first plane, wherein each of the second plurality of elongate conductive element winds around a second central axis, extending perpendicular to the second plane, in a second spiral formation; and
an isolated pattern of conductive elements;
wherein each of the first and second spiral formations is rectangular in shape;
wherein each of the first plurality of elongate conductive elements is interlaced with a corresponding one of the second plurality of elongate elements;
wherein each of the first plurality of elongate conductive elements is electrically connected to the corresponding one of the second plurality of elongate conductive elements; and
wherein each turn of the first spiral formation is located directly opposite a corresponding gap between successive turns of the second spiral formation in an unbending portion of the rectangular first and second spiral formations, wherein gaps are created at bended portions of the rectangular first and second spiral formations and wherein the isolated pattern of conductive elements fills the gaps between each of the first plurality of elongate conductive elements and each of the second plurality of elongate conductive elements,
wherein a width of each of the first plurality of elongate conductive elements is equal to or greater than a width of the corresponding gap.

2. The assembly of claim 1 , wherein a dielectric substrate layer separates the first plane and the second plane.

3. The assembly of claim 1 , wherein the first spiral formation is wound in a same direction as the second spiral formation.

4. The assembly of claim 1 , wherein a first magnetic field generated by a combination of the first and second pluralities of elongate conductive elements is stronger than each of a second magnetic field generated by the first plurality of elongate conductive elements alone and a third magnetic field generated by the second plurality of elongate conductive elements alone.

5. The assembly of claim 1 , wherein the first and second pluralities of elongate conductive elements each comprise at least three elongate conductive elements.

6. The assembly of claim 1 , wherein the first and second pluralities of elongate conductive elements each comprise at least nine elongate conductive elements.

7. The assembly of claim 1 , wherein the first and second pluralities of elongate conductive elements are configured to minimally obstruct images of an object obtained using x-ray fluoroscopy, where x-rays are passed through the first and second pluralities of elongate conductive elements, and where the object is located over an unbending portion of each of the first and second pluralities of conductive elements.

8. The assembly of claim 1 , wherein the first and second pluralities of elongate conductive elements comprise at least one of the following: aluminum, copper, graphene, and magnesium.

9. The assembly of claim 1 , wherein the first and second pluralities of elongate conductive elements are formed using printed circuit board technology.

10. The assembly of claim 1 , wherein the first and second pluralities of elongate conductive elements are located within a housing.

11. The assembly of claim 1 , wherein the housing comprises carbon fiber.

12. The assembly of claim 1 , wherein the first and second pluralities of elongate conductive elements are configured to be located above, below, or within the table.

13. The assembly of claim 1 , wherein the first central axis is slightly offset from the second central axis.

14. The assembly of claim 1 , wherein the first and second pluralities of elongate conductive elements are configured to minimally obstruct images obtained using x-ray fluoroscopy, where x-rays are passed through the first and second pluralities of elongate conductive elements.

15. The assembly of claim 14 , wherein the first and second pluralities of elongate conductive elements are configured to appear homogenous in the images obtained using x-ray fluoroscopy.

16. A magnetic field generating assembly, configured to be associated with a table supporting a body, the assembly comprising:
a first plurality of elongate conductive elements arranged in a first plane, wherein each of the first plurality of elongate conductive element winds around a first central axis, extending perpendicular to the first plane, in a first spiral formation; and
a second plurality of elongate conductive elements arranged in a second plane, the second plane being substantially parallel to the first plane, wherein each of the second plurality of elongate conductive element winds around a second central axis, extending perpendicular to the second plane, in a second spiral formation; and
an isolated pattern of conductive elements;
wherein each of the first and second spiral formations is rectangular in shape;
wherein each of the first plurality of elongate conductive elements is interlaced with a corresponding one of the second plurality of elongate elements;
wherein each of the first plurality of elongate conductive elements is electrically connected to the corresponding one of the second plurality of elongate conductive elements; and
wherein each turn of the first spiral formation is located directly opposite a corresponding gap between successive turns of the second spiral formation in an unbending portion of the rectangular first and second spiral formations, wherein gaps are created at bended portions of the rectangular first and second spiral formations and wherein the isolated pattern of conductive elements fills the gaps between each of the first plurality of elongate conductive elements and each of the second plurality of elongate conductive elements,
wherein a width of each of the first plurality of elongate conductive elements is less than a width of the corresponding gap.

17. A medical device navigation system comprising:
a magnetic field generator assembly configured to be used in close proximity to a body undergoing treatment, wherein the magnetic field generator assembly comprises:
a first plurality of elongate conductive elements arranged in a first plane, wherein each of the first plurality of elongate conductive element winds around a first central axis, extending perpendicular to the first plane, in a first rectangular spiral formation; and
a second plurality of elongate conductive elements arranged in a second plane, the second plane being substantially parallel to the first plane, wherein each of the second plurality of elongate conductive element winds around a second central axis, extending perpendicular to the second plane, in a second rectangular spiral formation;
a conductive wire connecting the first and second pluralities of conductive elements to a power source;
an isolated pattern of conductive elements;
a control unit capable of controlling current supplied to the first and second pluralities of conductive elements; and
a housing surrounding the first and second pluralities of conductive elements;
wherein each of the first plurality of elongate conductive elements is interlaced with a corresponding

Assignees

• St Jude Medical Int Holding Sarl
• St Jude Medical Int Holding Sa R L

Inventors

• Izmirli Alon
• Vaknin Yuval
• Hevel Guy
• Herscovici Adrian
• Jacobs David

Classifications

• A61B5/062 Primary

  using magnetic field · CPC title

• A61B6/0407

  Supports, e.g. tables or beds, for the body or parts of the body · CPC title

• A61B6/487

  involving fluoroscopy · CPC title

• G01R33/34038

  Loopless coils, i.e. linear wire antennas · CPC title

• G01R33/3808

  Magnet assemblies for single-sided MR wherein the magnet assembly is located on one side of a subject only; Magnet assemblies for inside-out MR, e.g. for MR in a borehole or in a blood vessel, or magnet assemblies for fringe-field MR · CPC title