Materials and devices of enhanced electromagnetic transparency
First Claim
1. A material that enhances the electromagnetic transparency of an electromagnetic energy absorbing object.
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Accused Products
Abstract
Materials, devices and methods are described for making and using devices of enhanced electromagnetic transparency. Desirable embodiments include for example, nanomagnetic compositions that provide series and/or parallel resonances that act to diminish induced current and/or voltage in devices and thereby alter electromagnetic penetration. Devices, including medical implants, such as stents, may be formed or modified in a variety of protective conformations. Such conformations include, for example, the addition or formulation with layer(s) of protective material or with of discrete components such as multiple capacitors and inductors.
194 Citations
33 Claims
- 1. A material that enhances the electromagnetic transparency of an electromagnetic energy absorbing object.
- 18. A method making an implantable device that is at least partially shielded to electromagnetic penetration, comprising the step of adding one or more current cancellation circuits to one or more electromagnetic energy responsive substrates of the device, thereby diminishing induced current in the device.
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26. A shielded implantable device, comprising a first electromagnetic energy responsive substrate that forms an induced voltage in opposition to an applied electromagnetic energy, and a second set of multiple voltage cancellation circuits thereby diminishing the substrate'"'"'s induced voltage.
- 27. An MRI compatible implantable device having enhanced transparency to an electromagnetic energy beam, comprising a first material opaque to the electromagnetic energy beam and a second material that enhances transparency of the first material to the electromagnetic energy beam wherein the device, after implantation, presents a direct current magnetic susceptibility that is plus or minus 0.001 centimeter-gram-seconds.
- 29. A method of enhancing transparency of an implantable device to radio frequency energy, comprising adding a material to the device, wherein the material has at least one of the properties of induced current cancellation and induced voltage cancellation.
- 32. An implantable device coated with material that enhances the electromagnetic transparency of the device.
Specification