Abstract: A method of operating a magnetic resonance imaging (MRI) apparatus includes exciting a body coil of the MRI apparatus to emit a radio-frequency signal, determining a center frequency of a resonance curve of the body coil, and calculating a magnet target frequency based on the determined center frequency. A magnet is ramped to the magnet target frequency.

Abstract: A system for impregnating a superconductive wire surrounded by insulation with a resin provided in liquid form in a vessel, has an input arrangement that introduces the wire into the vessel, a transport device that moves the wire through the resin in the vessel and a pressure applicator that applies pressure to the wire, transversely to its length, at at least one location within the vessel while in contact with the resin, so as to expel gases otherwise trapped within the insulated wire. Each pressure applicator is formed by a co-operative pair of pinch rollers, with one pinch roller of each pair being doubly flanged to provide a substantially central recess to accommodate the insulated wire, and the other pinch roller of each pair is formed with a central tongue dimensioned to enter the recess to trap the wire therein and apply pressure thereto.