Improved B1 Homogeneity and Reduced Transmit Power with 4-channel Regional RF Shimming for Breast Imaging at 3 T
Kosuke Ito 1 , Yukio Kaneko 2 , Yoshihisa Soutome 2 , and Masahiro Takizawa 1
Hitachi Medical corporation, Kashiwa, Chiba,
Ltd, Central Research Laboratory, Kokubunji, Japan
The regional RF shimming using 4-channel RF transmit
coil was evaluated for breast imaging in vivo at 3 T.
The homogeneity of B1 and relative RF transmit power
were compared with QD mode, volume RF shimming mode, and
regional RF shimming mode. By using regional RF shimming
mode, B1 homogeneity in breast region was improved about
35%, and relative RF transmit power decreased about 18%
compared to QD mode. These results show the regional RF
shimming can improve B1 homogeneity and decrease RF
transmit power simultaneously.
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