Planar open magnet MRI system having active target field shimmin

Details Planar open magnet MRI system having active target field shimmin Planar open magnet MRI system having active target field shimmin

1997-11-20

1999-12-14

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324319, G01V 300

Patent

active

060022558

ABSTRACT:
A magnet resonance imaging system is described having an open magnet structure that provides a remote region of background field homogeneity for imaging that is open and accessible. The system includes spatial encoding gradient coils and a rf coil. The open magnet structure has an planar active shimming coil array that provides a remote region of enhanced field homogeneity with open geometry for easy accessibility to a patient. Preferably, the active planar shimming coil array has one or more pair of current loops arranged and constructed in a plane separating the open magnet structure from the remote region, a first loop having current in a first direction to provide a magnetic flux (i.e., magnetization vector) away from the plane and a second loop having current in the opposite direction to provide a magnetic flux (i.e., magnetization vector) toward the plane.

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