Abstract #4864
Phantom Results with a Matrix Shim Coil
Derek A. Seeber 1 , Kevin Koch 2 , and Dirk Beque 3
1
GE Healthcare, Florence, SC, United States,
2
Applied
Science Lab, Milwaukee, WI, United States,
3
GE
Reseach, Munich, Germany
A 27 cm diameter phantom was placed inside a 3T system
consisting of a gradient coil with a 24 channel matrix
shim array in a 6x4 array and was used to shim the
phantom. The phantom studies demonstrate a 3 times
reduction in frequency spread as compared with gradient
only shimming across the entire phantom. Slice by slice
shimming is shown to further reduce the frequency spread
by an additional factor of 2 over a global shim. The low
induced gradient voltages in the shim coils and fast
switching times demonstrate a potential for dynamic
shimming in the future.
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