B 1 Homogenization and Local SAR Reduction Using B 1 -control Receive Array Coil at 3T
Yukio Kaneko 1 , Yoshihisa Soutome 1,2 , and Hisaaki Ochi 1
Hitachi Ltd., Central Research Laboratory,
Kokubunji, Tokyo, Japan,
Medical Corporation, Kashiwa, Chiba, Japan
B1 inhomogeneity increases as the strength of a magnetic
field increases. Various methods to reduce the B1
inhomogeneity have been developed. However, B1
inhomogeneity still remains in some cases of abdominal
imaging. A more effective method is therefore required.
In this study, a B1-control receive array coil (BRAC),
which has the inductive mode during the RF transmit
period, was designed. The B1 field and local SAR field
in a human model were calculated in FDTD simulation. It
is shown that the BRAC can reduce B1 inhomogeneity and
local SAR in the human body.
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