Transverse gradient coil for mri systems and method for manufacturing the same
AssigneeGeneral Electric Company
InventorsWeijun Yin, Bruce Campbell Amm, Kathleen Melanie Amm, Tunc Icoz, Yogen Vishwas Utturkar, Wensen Wang
Life of this patent
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Abstract
A transverse gradient coil for an MRI system is provided. The transverse gradient coil comprises a first coil layer; and an insulation layer made of thermoplastic insulation resin which has a thermal conductivity greater than 1.5 W/m·K, the insulation layer having one side bonded to the first coil layer. A method for manufacturing the transverse gradient coil by injection molding or compression molding is also provided.
Claims24
A transverse gradient coil for a magnetic resonance imaging system, comprising:
- a first coil layer;
- and
- an insulation layer made of thermoplastic insulation resin which has a thermal conductivity greater than 1.5 W/m·K, the insulation layer having one side bonded to the first coil layer.
A method for manufacturing a transverse gradient coil for a magnetic resonance imaging system, comprising:
- providing an injection mold which includes a bottom mold and a top mold with coil grooves being formed in at least one of the bottom mold and the top mold;
- winding a copper conductor about coil grooves to form at least one coil layer of the transverse gradient coil;
- pre-treating the injection mold;
- and
- injecting melted thermoplastic insulation resin into the injection mold to form an insulation layer bonding to the at least one coil layer, wherein the thermoplastic insulation resin has a thermal conductivity greater than 1.5 W/m·K.
A method for manufacturing a transverse gradient coil for a magnetic resonance imaging system, comprising:
- providing a compression mold which includes a bottom mold and a top mold with coil grooves being formed in at least one of the bottom mold and the top mold;
- winding a copper conductor about the coil grooves to form at least one coil layer;
- filling pellets or powder of a thermoplastic insulation resin into the compression mold, wherein the thermoplastic insulation resin has a thermal conductivity greater than 1.5 W/m·K;
- pressing the compression mold at a temperature higher than the glass transition temperature of the thermoplastic insulation resin but lower than its melting point until the pellets or powder is compressed to a desired dimension and bonded to the at least one coil layer.
A method for manufacturing a transverse gradient coil for a magnetic resonance imaging system, comprising:
- providing a flat compression mold in rectangular shape comprising a top mold and a bottom mold;
- placing a first copper sheet at the bottom of the bottom mold;
- filling pellets or powder of a thermoplastic insulation resin into the bottom mold, wherein the thermoplastic insulation resin has a thermal conductivity greater than 1.5 W/m·K;
- laying a second copper sheet on the pellets or powder;
- connecting the top mold to the bottom mold;
- and
- pressing the compression mold at a temperature higher than the glass transition temperature of the thermoplastic insulation resin but lower than its melting point until the pellets or powder is compressed to a desired dimension and bonded to the first copper sheet and the second copper sheet so as to form a coil plate.
Dependencies are inferred from the claim text.