N.M.R. shims

Details N.M.R. shims N.M.R. shims

1985-01-24

1986-12-23

Lieberman, Allan M.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324300, 324318, 324319, 428343, G01R 3322

Patent

active

046314814

ABSTRACT:
A magnetic shim for an N.M.R. apparatus comprises a deformable body (particularly a flexible sheet) of electrically insulating material (e.g. P.V.C.) within which magnetic material (e.g. .gamma.-ferric oxide or barium ferrite) is dispersed. The shim may easily be attached (e.g. by an adhesive backing layer) to an inside wall of the apparatus and may suitably be cut to size until suitable magnetic compensation is achieved by trial and error. The nature of the compensation effected by the shim may be altered by employing different magnetic materials dispersed within the non-conducting material and/or by varying their concentration.

REFERENCES:
patent: 3569823 (1971-03-01), Golay
patent: 3598647 (1971-08-01), Von Alten et al.
patent: 4110236 (1978-08-01), Molina
Zupancic, "Current Shim for High Resolution Nuclear Magnetic Resonance on the Problem of Correcting Magnetic Field Inhomogeneities", Nuclear Institute J. Stefan, Ljubljana, Yugoslavia, 1962, pp. 621-624.

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