Patent ID: 6822451
Filing Date: 2004-11-23
Classification: G01R

Abstract:
A magnetic resonance imaging magnet assembly comprising:a primary coil including: a first set of turns having a first proscribed number of turns about an axis, the first set of turns being symmetrically positioned radially from the axis and longitudinally with respect to a mid plane perpendicular to the axis; a second set of turns having a second prescribed number of turns about the axis, the second set of turns being symmetrically positioned radially from the axis and longitudinally with respect to the mid plane outward of the first set of turns; a secondary coil including: a third set of turns having a third prescribed number of turns about the axis, the third set of turns being symmetrically positioned radially from the axis and longitudinally with respect to the mid plane in close proximity to the first set of turns and outward of the first set of turns; and a fourth set of turns having a fourth prescribed number of turns about the axis, the fourth set of turns being symmetrically positioned radially from the axis and longitudinally with respect to the mid plane in close proximity to the second sot of in turns and outward or the second and third sets of turns; wherein the first and third sets of turns are in a first prescribed turns ratio and the second and fourth sets of turns are in a second prescribed turns ratio.