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. 20, 2003
Filed:
Jun. 15, 2001
Marcel Jan Marie Kruip, Oxford, GB;
Nicholas David Parker, Harbury, GB;
Oxford Magnet Technology Limited, Oxford, GB;
Abstract
Apparatus is provided for generating an accurate magnetic field in a magnetic resonance imaging device. The device comprises a number of permanent magnet assemblies ( ) each of which is in thermal contact with a plate ( ) having good thermal conductivity, the plate ( ) is positioned between said permanent magnetic assemblies ( ) and gradient coils ( ). The plate ( ) has connected thereto one or more temperature sensors ( ) which provide a signal to control circuit ( ) which is arranged to control the operation to a plurality of thermoelectric heat pumping devices ( ) which are connected to a plate ( ) so that the overall heat generated by the heat pumping devices ( ) and the gradient coils ( ) is kept constant and is dissipated by a yoke ( ) of the magnetic resonance imaging apparatus.