Electromagnet for nmr tomography

Details Electromagnet for nmr tomography Electromagnet for nmr tomography

G - Physics

01

R

324/1, 317/29.6

G01R 33/3875 (2006.01) G01R 33/421 (2006.01) H01F 7/20 (2006.01)

Patent

CA 1192953

ABSTRACT OF THE DISCLOSURE An electromagnet for producing the constant magnetic field required in NMR tomography comprises a coil system of the Helmholtz double coil type. The coil system is enclosed in, and supported by, a stable cylindrical shell. The influence exerted by the cylindrical shell on the homo- geneity 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. The cylindrical shell is best made of a ferromagnetic material having low electric conductivity and is constructed of a plurality of axially serially disposed annular discs which are preferably divided into sectors.

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