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Abstract #0629

Z-direction B 1 + Homogenization Using B 1 -control Receive Array Coil and B 1 Rectifying Fin for L-spine Imaging at 3T

Yukio Kaneko 1 , Yoshihisa Soutome 1,2 , Hideta Habara 1,2 , Yoshitaka Bito 2 , and Hisaaki Ochi 1

1 Central Research Laboratory, Hitachi Ltd., Kokubunji, 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. Various methods to reduce the B1 inhomogeneity have been developed. However, B1 inhomogeneity in the z-direction still remains in lumbar spine (L-spine) imaging. Our previous study showed that a gB1-control receive array coil (BRAC)h and gB1 rectifying fin (BRF)h can control the B1 field locally. In this study, BRAC and BRF were designed in an FDTD simulation, and the B1 field and local SAR in a human model were calculated. BRAC and BRF were confirmed to reduce B1 inhomogeneity in the L-spine imaging.

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