Method and apparatus for eddy current compensation in a radio frequency probe
First Claim
1. A radio frequency (RF) probe assembly for determining a characteristic of an associated in vivo sensor within a living body, comprising:
- a transmit coil that produces an excitation signal, having a first orientation, to excite the in vivo sensor to produce a response signal;
a receive coil that produces a current in response to the response signal, the receive coil being oriented to interact with signals having a second orientation that is substantially orthogonal to first orientation;
at least one eddy current compensation coil that produces a compensation field, a component of the compensation field along the second orientation having a magnitude at the receive coil substantially equal and opposite to a magnitude of a similarly oriented component of a magnetic field associated with eddy currents induced within the body; and
a coupling adjustment component that adjusts the position of a given eddy current compensation coil of the at least one eddy compensation coil.
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Accused Products
Abstract
Systems and methods are provided for determining a characteristic of an associated in vivo sensor within a living body. A transmit coil produces an excitation signal, having a first orientation, to excite the in vivo sensor to produce a response signal. A receive coil produces a current in response to the response signal. The receive coil is oriented to interact with signals having a second orientation that is substantially orthogonal to first orientation. The probe further comprises at least one eddy current compensation coil that produces a compensation field. A component of the compensation field along the second orientation has a magnitude at the receive coil substantially equal and opposite to a magnitude of a similarly oriented component of a magnetic field associated with eddy currents induced within the body.
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Citations
3 Claims
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1. A radio frequency (RF) probe assembly for determining a characteristic of an associated in vivo sensor within a living body, comprising:
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a transmit coil that produces an excitation signal, having a first orientation, to excite the in vivo sensor to produce a response signal; a receive coil that produces a current in response to the response signal, the receive coil being oriented to interact with signals having a second orientation that is substantially orthogonal to first orientation; at least one eddy current compensation coil that produces a compensation field, a component of the compensation field along the second orientation having a magnitude at the receive coil substantially equal and opposite to a magnitude of a similarly oriented component of a magnetic field associated with eddy currents induced within the body; and a coupling adjustment component that adjusts the position of a given eddy current compensation coil of the at least one eddy compensation coil. - View Dependent Claims (2, 3)
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Specification