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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