Patent ID: 9041399
Filing Date: 2015-05-26
Classification: G01R,H01F

Abstract:
1. A gradient coil comprising: a first layer of coil comprised of a first plurality of turns of wires, wherein the first plurality of turns of wires spirals in a substantially parallel trajectory along an inner side wall of a cylindrical substrate in a first helical direction from one of an upper edge and a lower edge of the cylindrical substrate to the other of the upper and lower edges, where the first plurality of turns of wires traverses the substrate and then spirals along an outer side wall of the cylindrical substrate in a second helical direction to the one of the upper edge and the lower edge, so that each turn of wire in the first plurality of turns of wires circles along the side walls of the cylindrical substrate and includes a first portion wound along the inner side wall and a second portion wound along the outer side wall; and a second layer of coil comprised of a second plurality of turns of wires, wherein the second plurality of turns of wires spirals in a substantially parallel trajectory along the inner side wall of the cylindrical substrate in the second helical direction from one of the upper and lower edges of the cylindrical substrate to the other of the upper and lower edges, where the second plurality of turns of wires traverses the substrate and then spirals along the outer side wall of the cylindrical substrate in the first helical direction to the one of the upper and lower edges, so that each turn of wire in the second plurality of turns of wires circles along the side walls of the cylindrical substrate and includes a first portion wound along the inner side wall and a second portion wound along the outer side wall.