Magnetic resonance apparatus with an optimized detection field

Details Magnetic resonance apparatus with an optimized detection field Magnetic resonance apparatus with an optimized detection field

1989-10-24

1991-05-28

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324318, G01R 3320

Patent

active

050197789

ABSTRACT:
In an rf coil of a magnetic resonance apparatus steps are taken to optimize a uniform rf measuring field. To this end, axially extending current conductors are provided with means for generating a non-constant effective current intensity in current paths extending across a cylindrical surface so as to be parallel with a symmetry axis of the coil. This can be realized by deflecting axial conductors away from the cylindrical surface, by partly shielding them, by adding auxiliary coils to be individually controlled, or by connecting L-C circuits across the current conductors.

REFERENCES:
patent: 4591818 (1986-05-01), Butson
patent: 4712067 (1987-12-01), Roschmann et al.
patent: 4725781 (1988-02-01), Roschmann
patent: 4725782 (1988-02-01), Oppelt et al.
patent: 4737718 (1988-04-01), Kemner et al.
patent: 4799016 (1989-01-01), Rezvani
patent: 4839595 (1989-06-01), Boskamp
J. C. Watkins et al., "High Pass Bird-Cage Coil for Nuclear-Magnetic Resonance", Rev. Sci. Instrum., vol. 59, No. 6, Jun. 1988, pp. 926-929.

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