Abstract #1018
Total Current Reduced Design for Brain B 0 Shim Coil using Singular Value Decomposition
Kohjiro Iwasawa 1 , Yosuke Otake 1 , and Hisaaki Ochi 1
1
Central Research Laboratory, Hitachi Ltd.,
Kokubunji, Tokyo, Japan
Local B
0
shim
coils placed close to the head have been shown to
greatly reduce the B
0
inhomogeneity
of the brain. However, the total current increases
according to the number of channels which were
conventionally 32 or more. Here, we demonstrate a total
current reduced brain shim coil design using singular
value decomposition (SVD). An 18ch shim coil was
designed using SVD to mitigate insignificant currents
running in opposite directions. Simulated B
0
shimming
comparison showed that the designed shim coil can
greatly reduce the total current compared to
conventional local shim coils while maintaining the B
0
shimming
performance.
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