Method and apparatus for compensation of field distortion in a m

Details Method and apparatus for compensation of field distortion in a m Method and apparatus for compensation of field distortion in a m

1994-04-15

1995-12-12

Picard, Leo P.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

324320, 335304, 335306, G01V 300, G03G 2100

Patent

active

054753554

ABSTRACT:
A technique is provided for improving the homogeneity of the magnetic field within a cavity disposed inside a magnetic structure that has an opening to permit convenient access to an imaging region. The technique is based upon the step of inserting layers of magnetized material between plates of high magnetic permeability material. The layers are inserted at the boundary of the cavity. The technique includes the step of (1) computing the surface charges on the plates as used to derive the distribution of the magnetostatic potential, (2) analyzing the uniformity of the magnetic field within the imaging region as effected by the opening in the magnetic structure by expanding the magnetostatic potential in a spatial harmonic series, and (3) determining the geometry and the composition of the inserted layers based on the successive elimination of increasing orders of spatial harmonics in the potential expansion within the imaging region. This invention also includes the structure resulting from carrying out the technique of the invention.

REFERENCES:
patent: 5028903 (1991-07-01), Aubert
patent: 5107239 (1992-04-01), Abele
patent: 5162770 (1992-11-01), Abele
patent: 5216401 (1993-06-01), Leupold
patent: 5382905 (1995-01-01), Miyata et al.
patent: 5396209 (1995-03-01), Leupold
Optimum Design of Two-Dimensional Permanent Magnets, M. G. Abele, TR-21, NYU School of Medicine, New York, 1989.
Generation of a Uniform Field in a Yokeless Permanent Magnet for NMR Clinical Applications, M. G. Abele and H. Rusinek, TR-19, NYU School of Medicine, New York, 1988.
Effects of Demagnetization Characteristics in Two-Dimensional Permanent Magnets, M. G. Abele et al., TR-22, New York University, Jun. 1, 1990.
Field Computation in Permanent Magnets with Linear Characteristics of Magnetic Media and Ferromagnetic Materials, TR-24, New York University, Aug. 15, 1991.

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