Patent ID: 8947090
Filing Date: 2015-02-03
Classification: G01R,H01F

Abstract:
1. An MRI machine comprising an electromagnet assembly comprising a first pair of substantially co-planar main field coils and a second pair of co-planar main field coils, the coils of the coil pairs comprising superconducting material and the coil pairs being arranged substantially parallel to and spaced apart from each other to define a target area therebetween, wherein the main field coils in each pair are adjacent to each other, each main field coil including a left hand coil or a right hand coil respectively and are operatively configured so that resultant fields are symmetrical with respect to the target area around a plane of symmetry which lies midway between the plane of the first main field coil pair and the second main field coil pair and directed so as to have opposing polarities with the field shape and direction produced by the first main field coil pair being substantially mirrored about said plane of symmetry by those produced by the second main field coil pair.