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 (εr ~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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