Magnetic-resonance imaging apparatus

Details Magnetic-resonance imaging apparatus Magnetic-resonance imaging apparatus

1994-09-08

1997-07-22

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324318, 324322, G01V 0300, G01V 0314

Patent

active

056507240

ABSTRACT:
A magnetic-resonance imaging apparatus of the present invention comprises a gantry having a subject-placeable inner space and a local coil assembly insertable into an inner space of the gantry. The gantry has a static magnetic field magnet for creating a static magnetic field, a gradient magnetic field coil unit for creating, in the static magnetic field, a gradient magnetic field whose magnetic field intensity is varied in accordance with a position so that spatial position information may be imparted to a magnetic-resonance signal, a transmit/receive coil for exciting the subject with a high-frequency magnetic field and receiving a magnetic-resonance signal induced from the subject, and a first shim coil unit for correcting those inhomogeneous magnetic field components of the static magnetic field. The local coil assembly is equipped with a second shim coil unit for correcting those inhomogeneous magnetic field components of the static magnetic field.

REFERENCES:
patent: 5173661 (1992-12-01), Knuttel et al.
patent: 5235279 (1993-08-01), Kaufman et al.

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