SELF-SHIELDED GRADIENT COILS FOR NUCLEAR MAGNETIC RESONANCE IMAGING

摘要

The gradient coil set for a magnetic resonance (MR) appts. comprises a number of radially disposed coils (10,20,30) adapted to be placed within a main field magnet. Each coil is adapted to provide a respective surface current distribution. The total magnetic field resulting from the coaction of the surface current distribution has a predetermined single dimension within a predetermined area inside the coil set. Magnetic forces between the coil set and the field magnet are substantially eliminated.