Magnetic resonance safe cable for biopotential measurements
First Claim
1. A device for use in biopotential measurements in a magnetic resonance (MR) environment, the device comprising:
- a cable including;
a flexible plastic or polymer sheet extending as a single unitary structure from a first end to an opposite second end;
an electrically conductive trace disposed on the flexible plastic or polymer sheet and running from the first end to the opposite second end, the electrically conductive trace having sheet resistance of one ohm/square or higher, the electrically conductive trace having a hatching or checkerboard pattern; and
an electrode patch disposed on the electrically conductive trace at the second end, the electrode patch comprising a plurality of electrodes, the electrodes including;
a layer of electrically conductive material disposed on the electrically conductive trace at the second end that is more electrically conductive than the material comprising the electrically conductive trace, andan attachment layer disposed on the layer of electrically conductive material and configured to attach the electrode to human skin, the attachment layer comprising silver chloride;
wherein the cable and the electrode patch are attachable and detachable to each other via a mating connector disposed on one of the cable and the electrode patch.
1 Assignment
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Accused Products
Abstract
A cable for use in biopotential measurements in a magnetic resonance (MR) environment comprises a flexible plastic or polymer sheet (32, 40) extending as a single unitary structure from a first end to an opposite second end, and an electrically conductive trace (38, 58) disposed on the flexible plastic or polymer sheet and running from the first end to the opposite second end. The electrically conductive trace has sheet resistance of one ohm/square or higher, and may have a hatching or checkerboard pattern. The cable may further include an electrically insulating protective layer (50, 70) disposed on the substrate and covering the electrically conductive trace, an electrode (30) disposed on the electrically conductive trace at the second end, an edge connector (74) at the first end, or various combinations of such features.
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Citations
16 Claims
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1. A device for use in biopotential measurements in a magnetic resonance (MR) environment, the device comprising:
a cable including; a flexible plastic or polymer sheet extending as a single unitary structure from a first end to an opposite second end; an electrically conductive trace disposed on the flexible plastic or polymer sheet and running from the first end to the opposite second end, the electrically conductive trace having sheet resistance of one ohm/square or higher, the electrically conductive trace having a hatching or checkerboard pattern; and an electrode patch disposed on the electrically conductive trace at the second end, the electrode patch comprising a plurality of electrodes, the electrodes including; a layer of electrically conductive material disposed on the electrically conductive trace at the second end that is more electrically conductive than the material comprising the electrically conductive trace, and an attachment layer disposed on the layer of electrically conductive material and configured to attach the electrode to human skin, the attachment layer comprising silver chloride; wherein the cable and the electrode patch are attachable and detachable to each other via a mating connector disposed on one of the cable and the electrode patch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device for use in biopotential measurements in a magnetic resonance (MR) environment, the device comprising:
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a cable, including; a flexible plastic or polymer sheet extending as a single unitary structure from a first end to an opposite second end; an electrically conductive trace formed by vacuum evaporation or screen printing on the flexible plastic or polymer sheet and running from the first end to the opposite second end, the electrically conductive trace having sheet resistance of one ohm/square or higher, the electrically conductive trace having a hatching or checkerboard pattern; an electrically insulating protective layer disposed on the flexible plastic or polymer sheet and covering the electrically conductive trace; and an edge connector at the first end comprising a layer or layer stack of electrically conductive material disposed on the electrically conductive trace at the first end that is more electrically conductive than the material comprising the electrically conductive trace, the electrically insulating protective layer not covering the layer or layer stack of electrically conductive material; and an electrode disposed on the electrically conductive trace at the second end, the electrode configured for attachment to human skin, the electrically conductive trace electrically connecting the edge connector and the electrode, the electrically insulating protective layer not covering the electrode. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A device for use in biopotential measurements in a magnetic resonance (MR) environment, the device comprising:
a cable, including; a flexible plastic or polymer sheet extending as a single unitary structure from a first end to an opposite second end; an electrically insulating protective layer disposed on the flexible plastic or polymer sheet and covering the electrically conductive trace and an electrically conductive trace formed by vacuum evaporation or screen printing on the flexible plastic or polymer sheet and running from the first end to the opposite second end, the electrically conductive trace having sheet resistance of one ohm/square or higher, the electrically conductive trace having a hatching or checkerboard pattern. - View Dependent Claims (16)
Specification