Patent ID: 9360540
Filing Date: 2016-06-07
CPC Classification: G01R,H01F

Claim Text:
1. A method for patient placement in a magnetic resonance imaging system comprising: positioning a patient within a magnetic device, said magnetic device comprising a primary magnet, a secondary magnet and at least one correction magnet; generating a primary field through a patient-receiving portion, said primary magnet having a first upper coil and a second lower coil, and said primary field containing inhomogeneities within said patient-receiving portion and fringe fields outside thereof; generating, by said secondary magnet, a secondary field substantially countering said fringe fields produced by said primary magnet outside of said patient-receiving portion; and generating, by said at least one correction magnet, at least one field correction, 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.