Magnetic resonance imaging device equipped with Halbach rings

Abstract

The invention relates to a magnetic resonance imaging device (1) comprising a magnetic assembly (MagAss) generating a permanent magnetic field (B0) along a magnetization axis, the magnetic assembly (MagAss) comprising: support plates (SupPl) supporting permanent magnets (Mag) forming at least one Halbach ring (HlbRng), the Halbach rings being coaxial and configured so as to each generate a magnetic field (BRng) parallel to the magnetization axis, the support plates comprising at least one first end support plate (SupPl1), at least one second end support plate (SupPl2), and a plurality of central support plates (SupPl0) interposed between the end support plates, and the permanent magnets (Mag1, Mag2) supported by the end support plates, each having a first volume, the permanent magnets (Mag0) supported by the plurality of central support plates, each having a second volume,the first volume being larger than the second volume. Figure 4,

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