Electromagnet for NMR tomography

Details Electromagnet for NMR tomography Electromagnet for NMR tomography

1983-12-08

1986-05-06

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324319, G01R 3320

Patent

active

045874905

ABSTRACT:
An electromagnet for producing the constant magnetic field required in NMR tomography comprises a coil system (1, 2, 3, 4) of the Helmholtz double coil type. The coil system is enclosed in, and supported by, a stable cylindrical shell (5). The influence exerted by the cylindrical shell (5) on the homogeneity of the magnetic field, which is generated by the coil system in an accessible interior space defined by it and suitable to receive the body to be examined, is compensated by the particular dimensioning of the field and error coils (1, 2, 3, 4). The cylindrical shell (5) is best made of a ferromagnetic material having low electric conductivity and is constructed of a plurality of axially serially disposed annular discs (6) which are preferably divided into sectors.

REFERENCES:
patent: 4490675 (1984-12-01), Knuettel

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