Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1991-06-21
1993-01-05
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324309, G01R 3320
Patent
active
051774410
ABSTRACT:
An examination region (12) is defined by an elliptically crossed-section cylinder (20) of a non-conductive, non-magnetic material. The x, y, and z-gradient coils (24, 26, 22) are mounted on elliptically crossed-section cylindrical surfaces along the former for causing gradient magnetic fields within the examination region. Each of the x, y, and z-gradient coils includes a plurality of arrays or groups of coil loops. The arrays of coil loops are symmetric about a central plane of symmetry. To either side of the plane of symmetry, each of the first of the x, y, and z coil arrays (74, 80, 90) include at least a first group of loops in which current flows in a clockwise direction and a second array of loops (76, 82, 90) in which current flows in an opposite direction.
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Brown Robert W.
Martens Michael A.
Morich Michael A.
Patrick John L.
Petropoulos Labros
Picker International Inc.
Tokar Michael J.
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