PLANAR GRADIENT COIL DESIGN BY SCALING THE SPATIAL-FREQUENCIES OF MINIMUM-INDUCTANCE CURRENT-DENSITY

Gradient coil inductance has been remarkably reduced by the minimum-in ductance design technique, which minimizes the magnetic energy stored by the gradient coil. The planar gradient coil designed by this techni que, however, often has poor magnetic field linearity. Scaling the spa tial frequencies of the current density function derived by this metho d, the magnetic field linearity of the planar gradient coil can be gre atly improved with a small sacrifice of gradient coil inductance, A fi gure of merit of the planar gradient coil has been found to be improve d by scaling the spatial frequencies.