Abstract #2167

Improvement of B1+ Homogeneity and Reduction of Transmit RF Power Using 4-channel Regional RF Shimming in L-spine Imaging at 3T

Yukio Kaneko¹, Kosuke Ito², Masahiro Takizawa², Yoshihisa Soutome^1,2, Hideta Habara^1,2, Yusuke Seki¹, Tetsuhiko Takahashi², Yoshitaka Bito², and Hisaaki Ochi¹

¹Research and Development Group, Hitachi Ltd., Tokyo, Japan, ²Healthcare Company, Hitachi, Ltd., 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 lumbar spine in a sagittal plane has not yet been investigated. In this study, the effect of the number of RF transmit channels for regional RF shimming in the lumbar spine region was investigated. The results show that 4-channel RF shimming can contribute to improving B₁⁺ homogeneity and reducing the transmit RF power more than 2-channel RF shimming.

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