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Abstract #0405

Ultra High Dielectric Constant (uHDC) Head Insert at 3T for Dramatic Reduction of SAR and B 1 + inhomogeneity

Christopher Sica 1 , Wei Luo 2 , Sebastian Rupprecht 1 , Michael Lanagan 2 , Christopher Collins 3 , Raffi Sahul 4 , Seongtae Kwon 4 , and Qing Yang 1

1 Radiology, Penn State College of Medicine, Hershey, Pennsylvania, United States, 2 Engineering Science and Mechanics, Penn State University, Pennsylvania, United States, 3 Radiology, New York University, New York, New York, United States, 4 TRS Technologies, State College, Pennsylvania, United States

A novel configuration incorporating high dielectric material (╬Ár ~1200) was evaluated experimentally at 3T in the human brain and numerically with FDTD simulation for SAR reduction, B1+ enhancement and SNR improvement. The 10g average whole body SAR and whole brain SAR was reduced by 80.3% and 59.8%. System transmit power in experiment is reduced by 70%. The measured B1+ coefficient of variation was reduced on average by 30% across 16 slices in the brain. SNR gains of 40-50% in the periphery of the brain were observed.

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