FMRI compatible electrode and electrode placement techniques
AssigneeCompumedics Limited
InventorDonald R. Durousseau
Life of this patent
Estimating the term…
Abstract
An apparatus for monitoring an electrophysiological signal within a magnetically sensitive apparatus comprises a stretchable elastic cap having a plurality of electrode holders designed to be filled with a conductive electrolyte. Electrodes are disposed within the electrode holders and leads extend from the electrodes. The electrodes and the leads are made of a non-ferromagnetic conductive material.
Claims25
An apparatus for collecting physiological electrical signals inside of a magnetic resonance imaging system (MRI) during normal operation of the MRI system, the apparatus comprising:
- a plurality of electrodes wherein the electrodes are made of a non-ferromagnetic conductive material;
- one or more electrode leads connected to said electrodes wherein the leads are made of a nonferromagnetic conductive material and wherein at least two electrode leads are enclosed by flexible material configured to prevent coiling.
An apparatus for collecting physiological electrical signals inside of a shielded environment of a functional magnetic resonance imaging (MRI) system during normal operation of the MRI system and carrying such signals without amplification outside of the shielded environment, the apparatus comprising:
- one or more electrodes,
- one or more non-amplifying electrode lead connected to aid electrodes, wherein at least two electrode leads are enclosed by flexible material configured to prevent coiling, and wherein the electrode leads are manufactured from a material selected from the group consisting of:
- Silver, Tin, Gold, Carbon, Platinum, Iridium, Silver/Silver Chloride, Conductive Plastic, Carbonized Plastic, and Carbon Fibers,
- whereby the apparatus is configured to not interfere with the integrity of MRI data.
An apparatus for collecting physiological electrical signals inside of a shielded environment of a functional magnetic resonance imaging (MRI) system during normal operation of the MRI system and carrying such signals without amplification outside of the shielded environment, the apparatus comprising:
- one or more electrodes, and
- one or more non-amplifying electrode leads connected to said electrodes,
- wherein the electrode leads conduct signals over a distance of more than 10 feet,
- whereby the apparatus is configured to not interfere with the integrity of MRI data.
An apparatus for collecting physiological electrical signals inside of a shielded environment of a functional magnetic resonance imaging (MRI) system during, normal operation of the MRI system and carrying such signals without amplification outside of the shielded environment, the apparatus comprising:
- one or more electrodes,
- one or more electrode holders having an electrode positioned therein, and wherein the electrode holder contains an opening through which electrolyte can be applied to the patient;
- and
- one or more non-amplifying electrode leads connected to said electrodes, wherein the leads conduct signals over a distance of more than 10 feet,
- whereby the apparatus is confined to not interfere with the integrity of MRI data.
An apparatus for collecting physiological electrical signals inside of a shielded environment of a functional magnetic resonance imaging (MRI) system during normal operation of the MRI system and carrying such signals without amplification outside of the shielded environment, the apparatus comprising;
- one or more electrodes,
- one or more rubber electrode holders having an electrode positioned therein, and wherein the electrode holder contains an opening through which electrolyte can be applied to the patient, and
- one or more non-amplifying electrode leads connected to said electrodes, wherein the leads conduct signals over a distance of more than 10 feet,
- whereby the apparatus is configured to not interfere with the integrity of MRI data.
An apparatus for collecting physiological electrical signals inside of a shielded environment of a functional magnetic resonance imaging (MRI) system during normal operation of the MRI system and carrying such signals without amplification outside of the shielded environment, the apparatus comprising:
- one or more electrodes,
- an elastic cap for placement on a patient's head;
- a plurality of electrode holders mounted to the cap;
- and
- one or more non-amplifying electrode leads connected to said electrodes, wherein the leads conduct signals over a distance of more than 10 feet,
- whereby the apparatus is configured to not interfere with the integrity of MRI data.
An apparatus for collecting physiological electrical signals during normal operation of a Magnetoencephalography (MEG) system and carrying such signals without amplification outside of the shielded environment of the MEG system, the apparatus comprising:
- a plurality of nonmetallic electrodes;
- and
- one or more electrode leads connected to said electrodes wherein the leads are made of a non-ferromagnetic conductive material and wherein at least two electrode leads are enclosed by flexible material configured to prevent coiling.
An apparatus for collecting physiological electrical signals inside of a shielded environment of a functional magnetic resonance imaging (MRI) system during normal operation of the MRI system or an operating magnetoencephalography (MEG) system and carrying such signals without amplification outside of the shielded environment, the apparatus comprising:
- one or more electrodes being held in place by a flexible wrapping material;
- and
- one or more electrode leads connected to said electrodes wherein the leads are made of a non-ferromagnetic conductive material and wherein at least two electrode leads are enclosed by flexible material configured to prevent coiling.
A method of collecting electrical data inside of a shielded environment of a functional magnetic resonance imaging (MRI) system during normal operation of the MRI system without interfering with the integrity of the MRI data, the method comprising the steps of:
- placing one or more electrodes in dermal contact with a patient located inside of the shielded environment;
- connecting said electrodes to one end of a lead wire;
- connecting a second end of said lead wire to an amplifier system located outside of said shielded environment.
An apparatus for collecting electrophysiological data in a magnetically sensitive environment, the apparatus comprising:
- a signal amplification system;
- an electrode made of a non-ferromagnetic material;
- a lead made of a non-ferromagnetic material and extending from the electrode, the lead being conductively coupled to the signal amplification system and being of sufficient length to enable the signal amplification system to be placed beyond the magnetically sensitive environment.
A method of collecting electrophysiological data in a magnetically sensitive environment, the method comprising:
- providing a plurality of electrodes wherein the electrodes are made of a non-ferromagnetic conductive material;
- and
- connecting said electrodes to leads made of a non-ferromagnetic conductive material;
- and
- enclosing the leads in a flexible material configured to prevent coiling.
Dependencies are inferred from the claim text.