PERMANENT MAGNET ASSEMBLIES FOR USE IN MEDICAL APPLICATIONS

摘要

Permanent magnet (10) assemblies are disclosed for use in medical applications, particularly permanent magnet assemblies (11, 12) for use in Magnetic Resonance Imaging (MRI) and/or Magnetic Resonance Therapy (MRT) to produce a volume of substantially uniform magnetic field in a restricted part of the patient's body in a region either adjacent to the surface of one permanent magnet assembly (10) or between a set of a first and second permanent magnet assemblies (15, 16), leaving open access to the patient's body. The assemblies consist of a plurality of annular (20) concentric magnets spaced-apart along their axis of symmetry. A method for constructing such annular permanent magnetic (21) assemblies is disclosed, using equi-angular segments permanently magnetized.