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Abstract #1836

Optimization of matrix gradient coil switching for a limited number of amplifiers

Stefan Kroboth 1 , Kelvin Layton 1 , Feng Jia 1 , Sebastian Littin 1 , Huijun Yu 1 , and Maxim Zaitsev 1

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

Matrix coils have recently been introduced for shimming as well as encoding. To reduce costs, a switching circuit can be used to drive clusters of coil elements simultaneously with a reduced number of amplifiers. This work focuses on algorithmic approaches for finding suitable coil element clusters that are able to create an approximation to a desired target field. We introduce three algorithms and show that fewer amplifiers than coil elements do not necessarily reduce the flexibility of a matrix gradient coil, as long as the switching circuit suitably assigns the coil elements to the available amplifiers.

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