Localized magnetic field transmitter

Patent metadata

Field	Value
Publication number	US-11071471-B2
Application number	US-201916969551-A
Country	US
Kind code	B2
Filing date	Feb 11, 2019
Priority date	Feb 14, 2018
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

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. A medical positioning system comprising:
a magnetic field transmitting element that is substantially x-ray translucent, and configured and arranged to emit a magnetic field for tracking of a medical catheter within an area of interest;
a first magnetic field sensing element, coupled to the medical catheter, and configured and arranged to sample the magnetic field emitted from the magnetic field transmitting element; and
processing circuitry electrically coupled to the magnetic field sensing element and the magnetic field transmitting element, and configured and arranged to determine a relative location of the medical catheter based on the magnetic field sampled by the magnetic field sensing element;
wherein the magnetic field transmitting element includes two or more partial winds which extend across a common plane, each of the partial winds are electrically parallel to one another, and extend circumferentially about a common center point.

2. The medical positioning system of claim 1 , wherein the system further includes a second magnetic field transmitting element configured and arranged to operate in a complimentary polarity with the first magnetic field sensing element amplifying a magnetic field strength of the magnetic field, or in an opposing polarity to cause the magnetic field to rapidly decay.

3. The medical positioning system of claim 2 , wherein the first and second magnetic field transmitting elements are electrically coupled in series.

4. The medical positioning system of claim 2 , wherein the magnetic field transmitting element is further configured and arranged to be attached to a patient examination table; and
wherein the area of interest is located above the patient examination table.

5. The medical positioning system of claim 2 , 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 medical positioning system of claim 2 , 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 medical catheter is an intravascular catheter.

7. The medical positioning system of claim 2 , wherein the system further includes a third magnetic field transmitting element configured and arranged to operate in a complimentary polarity with one or more of the first and second magnetic field sensing elements amplifying a magnetic field strength of the magnetic field, or in an opposing polarity with the one or more of the first and second magnetic field sensing elements to cause the magnetic field to rapidly decay.

Assignees

• St Jude Medical Int Holding Sarl

Inventors

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

Classifications

• A61B5/283

  Invasive · CPC title

• A61B6/12 Primary

  Arrangements for detecting or locating foreign bodies · CPC title

• A61B6/4441

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

• A61B2034/2051

  Electromagnetic tracking systems · CPC title

• A61B5/6852

  Catheters · CPC title