Patent ID: 8952698
Filing Date: 2015-02-10
Classification: G01R,H01F

Abstract:
1. A magnetic resonance imaging system comprising: a vertically-oriented magnetic device, said magnetic device comprising a primary magnet, a secondary magnet and at least one correction magnet, said primary magnet having a first upper coil and a second lower coil, and generating a primary field through a patient-receiving portion therethrough, said primary field containing inhomogeneities within the patient-receiving portion and fringe fields outside thereof, said secondary magnet generating a secondary field substantially countering said fringe fields produced by said primary magnet outside of said patient-receiving portion, and said at least one correction magnet having respective at least one upper corrective coil and at least one lower corrective coil, and substantially correcting said inhomogeneities and straightening field lines associated with said primary field within said patient-receiving portion, wherein the distance between said first upper coil and said second lower coil is greater than the distance between said at least one upper corrective coil and said at least one lower corrective coil; and a patient positioning system, said patient positioning system adjustably positioning a patient within said patient-receiving portion.