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Abstract #3085

An improved design of multi-channel switching circuit for matrix gradient coil

Huijun Yu 1 , Frank Huethe 2 , Sebastian Littin 1 , Kelvin Layton 1 , Stefan Kroboth 1 , Feng Jia 1 , Jrgen Hennig 1 , and Maxim Zaitsev 1

1 Dept. of Radiology, Medical Physics, University Medical Center Freiburg, Freiburg, BW, Germany, 2 Dept. of Clinical Neurology and Neurophysiology, University of Freiburg, Freiburg, BW, Germany

An updated multi-channel switching circuit for matrix gradient coil is presented in this work to reduce the total number of gradient amplifiers and provide more flexibility to generate the customized current patterns. The bridge switches and interconnection switches are used to dynamically configure the current path of coil elements during the pulse sequence to generate the specific current pattern. The amplifier selection switches are used for dynamically defining different channels of the current path during the experiment (the number of channels of current path is equal to the number of used gradient power amplifiers).

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