Abstract #4813
Improving central transmit efficiency and homogeneity using interleaved shielded dielectric discs and coil elements in a 4-element transmit/receive array at 7 T
Manushka V. Vaidya 1,2 , Christopher M. Collins 1,2 , Ryan Brown 1 , Daniel K. Sodickson 1,2 , and Riccardo Lattanzi 1,2
1
Bernard and Irene Schwartz Center for
Biomedical Imaging, Department of Radiology, New York
University School of Medicine, New York, NY, United
States,
2
Sackler
Institute of Graduate Biomedical Sciences, New York
University School of Medicine, New York, NY, United
States
We performed simulations and experiments to evaluate the
benefits of placing shielded dielectric discs between
adjacent coil elements in a 4-element transmit/receive
array surrounding a uniform cylindrical dielectric
phantom at 7 T. Our results showed that array
performance is improved in the presence of
suitably-configured dielectric discs. In particular, the
B1 homogeneity improved by ~27% and the transmit
efficiency and SNR at the center improved by ~5%. The
proposed array design performs better than, and is based
on different physical principles than, conductive
shields placed above or completely surrounding the coil
elements.
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