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Abstract #3132

Transmit Power Reduction and B 1 + Homogenization Using 4-channel Regional RF Shimming for Shoulder Imaging at 3T

Yukio Kaneko 1 , Yoshihisa Soutome 1,2 , Kosuke Ito 2 , Masahiro Takizawa 2 , Hideta Habara 1,2 , Yusuke Seki 1 , Tetsuhiko Takahashi 2 , Yoshitaka Bito 2 , and Hisaaki Ochi 1

1 Central Research Laboratory, Hitachi Ltd., Kokubunji-shi, Tokyo, Japan, 2 Hitachi Medical Corporation, Kashiwa, Chiba, Japan

The B1 inhomogeneity in a human body increases as the strength of a static magnetic field increases. Previous studies showed the effect of the number of RF transmit channels in RF shimming. However, the effect for a partial region of the shoulder in 3T has not yet been investigated. In this study, numerical simulation was used to investigate the effect of the number of RF transmit channels for regional RF shimming in the shoulder region in 3T. The results show that 4-channel RF shimming can contribute to improve the B1 homogeneity and reduce the transmit RF power more than 2-channel RF shimming.

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