Localized magnetic field transmitter

Patent metadata

Field	Value
Publication number	US-11839461-B2
Application number	US-202117350969-A
Country	US
Kind code	B2
Filing date	Jun 17, 2021
Priority date	Feb 14, 2018
Publication date	Dec 12, 2023
Grant date	Dec 12, 2023

Abstract

Aspects of the present disclosure are directed to apparatuses for generating a magnetic field for tracking of a target object. Such an apparatus may include a localized magnetic field transmitter that generates a magnetic field and exhibits minimal X-ray absorption when used in proximity to a fluoroscopic imaging system, for example.

First claim

What is claimed is:

1. An apparatus for generating a magnetic field for tracking of an object within an area of interest, the apparatus comprising:
a magnetic field transmitting element configured and arranged to emit the magnetic field in the area of interest, the magnetic field transmitting element being x-ray translucent,
wherein the magnetic field transmitting element includes a multi-layer substrate having a first layer with first electrical traces disposed on a top outermost surface of the multi-layer substrate and a second layer with second electrical traces disposed on a bottom outermost surface of the multi-layer substrate, wherein first and second electrical traces being electronically coupled to one another with vias, which extend through the substrate between the first and second layers, the first and second electrical traces and the vias forming a coil electrically coupled to a power source, the coil configured to generate the magnetic field.

2. The apparatus of claim 1 , wherein the apparatus includes two or more magnetic field transmitting elements configured and arranged to operate in a complimentary polarity which amplifies a magnetic field strength of the magnetic field, or in an opposing polarity to cause the magnetic field to rapidly-decay.

3. The apparatus of claim 2 , wherein the two or more magnetic field transmitting elements are electrically coupled in series.

4. The apparatus of claim 1 , wherein:
the magnetic field transmitting element is further configured and arranged to be attached to a patient examination table; and
the area of interest is located above the patient examination table.

5. The apparatus of claim 1 , wherein the magnetic field transmitting element is further configured and arranged to be placed on a chest of a patient, and the area of interest is a cardiac muscle.

6. The apparatus of claim 1 , wherein the magnetic field transmitting element is further configured and arranged to be coupled to a patient examination table, the area of interest is a cardiac muscle, and the tracked object is an intravascular catheter.

7. An apparatus for generating a magnetic field for tracking of an object within an area of interest, the apparatus comprising:
a magnetic field transmitting element configured and arranged to emit the magnetic field in the area of interest, the magnetic field transmitting element being x-ray translucent,
wherein the magnetic field transmitting element includes a multi-layer substrate having a first layer with first electrical traces disposed on a top outermost surface of the multi-layer substrate and a second layer with second electrical traces disposed on a bottom outermost surface of the multi-layer substrate, the substrate includes one or more rounded edges configured and arranged to facilitate winding of the first and second electrical traces about the substrate to reduce a signature of the magnetic field transmitting element on an x-ray image, wherein the first and second electrical traces form a coil electrically coupled to a power source, the coil configured to generate the magnetic field.

Assignees

• St Jude Medical Int Holding Sarl

Inventors

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

Classifications

• A61B5/062 Primary

  using magnetic field · CPC title

• A61B5/6852

  Catheters · CPC title

• A61B34/20

  Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis · CPC title

• G01R33/307

  specially adapted for moving the sample relative to the MR system, e.g. spinning mechanisms, flow cells or means for positioning the sample inside a spectrometer · CPC title

• A61B6/4441

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