TRANSVERSE GRADIENT FIELD COILS FOR NUCLEAR MAGNETIC RESONANCE IMAGING

摘要

Etching methods are employed on a thin conducting sheet so as to fabricate complicated magnetic coil patterns which are necessary to produce magnetic fields of high uniformity or other given design. The etching is performed so that material is removed along a thin line or lines which correspond to current streamlines of the ideal current distribution so that the remaining material exhibits a relatively wide region of conducting material having reduced electrical resistance. The coil winding patterns described are capable of producing transverse gradient magnetic fields with an exceedingly high degree of linearity in intensity with respect to a cylindrical coil form on which the RF and gradient coils are generally disposed.