Tunable radio-frequency coil

Details Tunable radio-frequency coil Tunable radio-frequency coil

2009-07-10

2011-11-01

Shrivastav, Brij (Department: 2858)

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

C324S309000

Reexamination Certificate

active

08049502

ABSTRACT:
A radio frequency (RF) coil comprising a plurality of electrically uninterrupted conductive legs, each leg having a first end and a second end, and at least one continuous conductor electrically connected to the first ends of the legs. Frequency tuning of the coil is achieved by translating, along the legs, an electrically continuous tuning band that includes a capacitor closed about the axis of the coil in proximity to the conductive legs. Maintaining electrical symmetry of the coil results in tuning ranges of at least 30 percent of the nominal value of the resonant frequency.

REFERENCES:
patent: 4916418 (1990-04-01), Rath
patent: 6396271 (2002-05-01), Burl et al.
patent: 7202668 (2007-04-01), Ludwig et al.
patent: 7268554 (2007-09-01), Vaughan
patent: 0579473 (1998-11-01), None
Coilcraft, Inc., “7 mm Tunable RF Coils—146,150 Series”, Document 109-1, 109-2, Nov. 27, 2002.
Doty, et al., “Practical Aspects of Birdcage Coils”, Journal of Magnetic Resonance 138, pp. 144-154 , Dec. 18, 1998.

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