The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 2009
Filed:
Jun. 20, 2001
John Brian Pendry, Cobham, GB;
Ian Robert Young, Malborough, GB;
Michael Charles Keogh Wiltshire, High Wycombe, GB;
Joseph Vilmos Hajnal, London, GB;
David James Larkman, London, GB;
David John Gilderdale, South Devon, GB;
John Brian Pendry, Cobham, GB;
Ian Robert Young, Malborough, GB;
Michael Charles Keogh Wiltshire, High Wycombe, GB;
Joseph Vilmos Hajnal, London, GB;
David James Larkman, London, GB;
David John Gilderdale, South Devon, GB;
Ericsson AB, Stockholm, SE;
Abstract
A material having magnetic permeability at r.f. frequency, for example a microstructured magnetic material has a magnetic permeability of negative value but unity magnitude over a particular r.f. frequency range. The singularity in the flux pattern has the result that magnetic resonant disturbances in a plane C,E normal to the line C,D are focussed into a plane D,F also normal to the line C,D and vice versa. This is particularly applicable to magnetic resonance apparatus, since the material can be used to transfer the r.f. magnetic flux distribution in a target region in a patient, for example at C,E to D,F where the flux may be directly measured by receive coils. Equally, transmit coils may generate flux to be focussed into the target region by the material. Magnetic resonance apparatus may be constructed which does not require gradient coils, and r.f. hypothermia may be carried out in a focussed way, minimising damage to surrounding tissue.