Picker Nordstar Corporation

Rurik B Englund

Jan-Erik M Lindholm

IImari V Kinanen

An MR imaging apparatus includes a magnet assembly having two generally opposed pole pieces. Current flowing in driver coils associated with each pole pieces generates a magnetic field in the imaging region. The driver coils include a conductor having beveled edges, the conductor being wound in a spiral fashion. A layer of electrical insulation is located between the conductor windings. A cooling member fabricated from bifilar wound tubing having a generally rectangular cross section is in thermal communication with each driver coil. Coolant flowing through the cooling member removes heat generated in the driver coils.

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Porvoo, Finland

Rurik B Englund