Stefan Kroboth1, Kelvin J. Layton1, Feng Jia1, Sebastian Littin1, Huijun Yu1, Jürgen Hennig1, and Maxim Zaitsev1
A matrix gradient coil consisting of 84 small coil elements was designed
and constructed at our institution. Driving each coil element with an
individual amplifier is impractical due to the high current requirements. To
resolve this limitation, groups of coil elements can be connected in series and
driven by a limited number of amplifiers. Such grouping configurations are
obtained for one or several target fields. In the latter case, the
configurations need to be switched with a switching circuit. We propose an
algorithm to minimize the number of necessary switches to reduce the complexity
and cost of this circuit.
