Picker Nordstar Corporation

General Electric Company

Nycomed Imaging as

Picker Nordstar Oy

Ian R Young

Gosta J Ehnholm

Gordon D DeMeester

Ilmari V Kinanen

Robert G Gylling

Klaes Golman

Ib Leunbach

Lars-Goran Wistrand

Stefan Petersson

Georg Hansson

A magnetic resonance imaging suite is sheathed with plates (32, 34, 36) of iron or other ferrous material. The plates define projections (42, 44, 54, 54', 68) in alignment with each other on opposite ceiling and floor or wall surfaces. A pair of magnetic pole pieces (10, 10'; 50, 50'; 60, 60') are surrounded by superconducting electromagnetic coils (12, 12'; 52, 52'; 62, 62'). The pole pieces are positioned between the ferrous plates in axial alignment. When current flows through the electromagnetic coils, magnetic flux flows between the pole pieces. The ferrous wall sheathing or other ferrous constructions define a flux return path. The pole pieces are magnetically attracted toward each other and are each magnetically mirrored in and attracted toward the adjacent ferrous flux return path. The pole pieces are positioned relative to each other and the ferrous flux return path such that the attraction between the pole pieces is balanced by the attraction between each pole piece and its magnetically mirrored image in the adjacent ferrous material of the flux return path. Optionally, the magnets are selectively extinguished and one or both pole pieces are moved for better access to the patient.

Magnetic resonance imaging system with floating pole pieces

This invention relates to a method of electron spin resonance enhanced magnetic resonance imaging which relies on ex vivo dynamic nuclear polarisation of an MR imaging agent.

Nuclear Polarization Enhanced Nuclear Magnetic Resonance Imaaging

A method of determining the proportions of different components of material in a duct comprises exciting nuclear magnetic spins of nuclei of a species common to the components in a region of the duct and utilizing the resulting free induction decay (FID) signal. The nuclear spins are excited simultaneously in the components and the proportions are determined by measuring the phase of the FID signal relative to a phase datum. The method finds particular application for measuring the proportions of oil and water in material obtained from a sub-sea oil well.

Methods and apparatus for investigatitng the composition of material

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West Overton, United Kingdom

Ian R Young