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
Dept. of Radiology, Medical Physics,
University Medical Center Freiburg, Freiburg, BW,
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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