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
Central Research Laboratory, Hitachi Ltd.,
Kokubunji, Tokyo, Japan,
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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