Abstract #2208

Optimization of a switching circuit for a matrix gradient coil

Stefan Kroboth¹, Kelvin J. Layton¹, Feng Jia¹, Sebastian Littin¹, Huijun Yu¹, Jürgen Hennig¹, and Maxim Zaitsev¹

¹Medical Physics, University Medical Center Freiburg, Freiburg, Germany

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.

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