Apparatus for tuning an NMR field coil

Details Apparatus for tuning an NMR field coil Apparatus for tuning an NMR field coil

1988-04-06

1989-04-11

Levy, Stewart J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324322, G01R 3320

Patent

active

048209856

ABSTRACT:
A coil assembly for radio frequency NMR imaging is designed to resonate at a desired frequency. The assembly includes a cylindrical field coil having a pair of conductive end loops disposed in a spaced-apart relation along a central axis. A plurality of conductive segments electrically interconnect the conductive end loops at periodic points around their periphery. These conductive segments include reactive elements which cause the field coil to resonate at a given frequency. A magnetic shield is disposed about the field coil. A plurality of reactive shunts are coupled between different locations about the periphery of the field coil and a common electrical node, such as the shield. Each of the reactive shunts is variable to increase or decrease the resonant frequency of the field coil, thereby tuning it to the desired frequency.

REFERENCES:
patent: 4638253 (1987-01-01), Jaskolski et al.
patent: 4642569 (1987-02-01), Hayes et al.
patent: 4680548 (1987-07-01), Edelstein et al.
patent: 4680551 (1987-07-01), O'Donnell et al.
patent: 4692705 (1987-09-01), Hayes
patent: 4694255 (1987-09-01), Hayes

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