Abstract: A method is provided for manufacturing a coil for a magnet. The method comprises the steps of providing a curved former, and disposing at least one hard-wire electrical conductor around the curved former. The former is initially manufactured in a flat or substantially flat shape, and is then bent into a desired curved shape. The former may be manufactured by moulding, and may be manufactured from a resilient material.

Abstract: A coil for a magnet used in magnetic resonance imaging (MRI) systems, the coil including a grooved resilient former and an electrical conductor disposed around the former, wherein the former includes a sheet of flexible material having a tubular shape.

Abstract: A magnet comprises an electrical conductor wound over a tubular former. The former is initially produced as a flat former, and it is bent into a tubular shape. The former is made of a resilient material to absorb vibrations of the electrical conductor.

Abstract: This invention is concerned with actively shielded magnetic resonance (MR) devices and more particularly with an improved system which includes only a single former. All the coils of the system those with backward current and those with forward current, can all be wound in a single process on a single former machined during a single installation.

Abstract: This invention is concerned with actively shielded magnetic resonance (MR) devices and more particularly with protecting such systems in the event of a quench by preventing changes in the stray field outside the magnetic devices. The invention includes dividing the system's coils into groups each comprised of inner and outer coils and arranged so that the net dipole moment, and the contribution to stray field from each group is always close to zero. Each group is connected in parallel to a protective unit, for example a resistor, so that the excess current can flow through the protective unit in the event of a quench; thus avoiding the burnout of the system's coils.