Magnetic resonance imaging interference immune device

Electricity: measuring and testing – Particle precession resonance – Spectrometer components

Reexamination Certificate

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C324S322000

Reexamination Certificate

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06949929

ABSTRACT:
A voltage compensation unit reduces the effects of induced voltages upon a device having a single wire line. The single wire line has balanced characteristic impedance. The voltage compensation unit includes a tunable compensation circuit connected to the wire line. The tunable compensation circuit applies supplemental impedance to the wire line. The supplemental impedance causes the characteristic impedance of the wire line to become unbalanced, thereby reducing the effects of induced voltages caused by changing magnetic fields.

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“Reduction of Resonant RF Heating in Intravascular Catheters Using Coaxial Chokes” Magnetic Resonance in Medicine, 2000:43:615-619.

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