Gradient coil and gradient coil unit for MRI and methods of manu

Details Gradient coil and gradient coil unit for MRI and methods of manu Gradient coil and gradient coil unit for MRI and methods of manu

1992-05-13

1994-09-27

Arana, Louis

Metal working

Method of mechanical manufacture

Electrical device making

324318, H01F 706

Patent

active

053497449

ABSTRACT:
A gradient coil for MRI is manufactured by including following steps; a stamping step of stamping a plurality of gradient coil pieces having predetermined patterns out of a conductor plate, a forming step of curving the stamped gradient coil pieces in conformity with a curvature of an outer circumferential surface of a bobbin, and a lamination step of superposing the curved gradient coil pieces one on another as a gradient coil(i.e., an x-coil and a y-coil). An insulating adherent sheet having a hole is interposed between the two superposed gradient coil pieces having curled patterns but opposite curling directions to each other. The inner ends of the two interposed coil pieces are electrically connected in series through the hole of the sheet and the outer ends of them provide current input and output terminals. Two pairs of saddle-like x-coils and two pairs of saddle-like y-coils and two solenoid z-coils are further laminated with insulating adherent sheets to form a gradient coil unit. Such a gradient coil unit can be applied to active shield-type gradient coil units.

REFERENCES:
patent: 3911716 (1975-10-01), Weglin
patent: 4733189 (1988-03-01), Punchard et al.
patent: 4737716 (1988-04-01), Roemer et al.
patent: 4794338 (1988-12-01), Roemer et al.
patent: 4847985 (1989-07-01), Aubert
patent: 4873757 (1989-10-01), Williams

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