Permanent magnet for nuclear magnetic resonance imaging equipment
AssigneeUniversite Joseph Fourier
InventorGuy Aubert
Life of this patent
Estimating the term…
Abstract
A permanent magnet for nuclear magnetic resonance imaging that provides an intense and highly homogeneous magnetic magnetic field is disclosed. The magnet is made up of a set of rings having two sub-sets of rings of permanently magnetized polygonal blocks, wherein the rings of a sub-set of rings are substantially concentric. In addition, the rings of the two sub-sets are complementary in terms of magnetization. Each ring of a sub-set is separated from its complementary ring by a space that is substantially the same for all pairs of complementary rings. The rings have a regular polygonal structure and are made up of blocks that also have regular polygonal shapes.
Claims10
A permanent magnet for nuclear magnetic resonance imaging equipment, comprising:
- a set of rings comprising two sub-sets of rings of magnetized blocks for producing an intense and homogeneous magnetic field in a region of space, the rings within each sub-set being substantially concentric the rings in each subset being complementary in terms of magnetization, each ring of a sub-set being separated from its complementary ring in a facing sub-set by a height of this region, said height being substantially the same for all pairs of complementary rings, wherein the rings have a regular polygonal structure and are comprised of blocks, the number of blocks in each ring being substantially greater than or equal to four times the number of rings in a subset of rings.
A permanent magnet for nuclear magnetic resonance imaging equipment, comprising:
- a set of rings comprising two sub-sets of rings of permanently magnetized blocks for producing an intense and homogeneous magnetic field in a region of space, the rings being complementary in terms of magnetization, the rings within each sub-set of rings being substantially concentric, each ring of a sub-set of rings being separated from its complementary ring in a facing sub-set by a height of this region, said height being substantially the same for all pairs of complementary rings, rings of successively greater diameter in each of the sub-sets of rings being provided with blocks in which the orientation of magnetization is radial with respect to the rings.
Dependencies are inferred from the claim text.