| 摘要 |
<p>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.</p> |
