초록 ▼

An MRI apparatus for imaging an object includes a base, a pair of magnets, and a transceiver unit. The magnets are mounted on the base with the North pole face of one magnet facing the South pole face of the other magnet. The North pole face and the South pole face are each substantially arcuate, an

An MRI apparatus for imaging an object includes a base, a pair of magnets, and a transceiver unit. The magnets are mounted on the base with the North pole face of one magnet facing the South pole face of the other magnet. The North pole face and the South pole face are each substantially arcuate, and are positioned on the base to establish a magnetic field in a substantially U-shaped region between the North pole face and the South pole face. Importantly, imaging is performed in a nonhomogeneous portion of this magnetic field. This portion is characterized by substantially parallel surfaces having mutually different constant magnetic field magnitudes. Importantly, the space between the magnets at the top of the U-shaped region creates an access into the U-shaped region. To image an object, the object is placed through the access and into the portion of the magnetic field having surfaces of constant magnetic field magnitude. The transceiver unit is then used to selectively irradiate each surface in the magnetic field with electromagnetic radiation to image the object over each surface.

대표청구항 ▼

[ What is claimed is:] [1.] An MRI apparatus for imaging an object in a nonhomogeneous magnetic field which comprises:a base;a first magnet having an arcuate North pole face mounted on said base;a second magnet having an arcuate South pole face mounted on said base to establish a channel region betw

[ What is claimed is:] [1.] An MRI apparatus for imaging an object in a nonhomogeneous magnetic field which comprises:a base;a first magnet having an arcuate North pole face mounted on said base;a second magnet having an arcuate South pole face mounted on said base to establish a channel region between said North pole face of said first magnet and said South pole face of said second magnet and to create a nonhomogeneous magnetic field in said channel region, a portion of said magnetic field having contiguous surfaces, each said surface having a substantially constant magnetic field magnitude, with said surfaces having mutually different magnetic field magnitudes; anda transceiver unit for selectively irradiating one said surface in said magnetic field to image an object over said surface when said object is positioned in said channel region.