Radio frequency coils for nuclear magnetic resonance imaging sys

Details Radio frequency coils for nuclear magnetic resonance imaging sys Radio frequency coils for nuclear magnetic resonance imaging sys

1985-11-15

1988-01-05

Levy, Stewart J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324318, G01R 3320

Patent

active

047178817

ABSTRACT:
Radio frequency apparatus for a magnetic resonance system is provided which includes an r.f. coil and DC controlled circuitry for selectively altering the characteristics of the coil. A loading coil is provided which is selectively activated to de-Q the coil during r.f. transmission so as to minimize the loading effects of the subject and their effect on coil impedance. A switched network is provided which selectively destroys the normal resonant condition of the coil when a second r.f. coil is operative to minimize interaction between the two coils.

REFERENCES:
patent: 3242424 (1966-03-01), Redfield
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patent: 4649348 (1987-03-01), Flugan
patent: 4680549 (1987-07-01), Tanttu
E. Boskamp, Application of Surface coils in MR Imaging, Medicamundi, vol. 29, No. 2, 1984.

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