Abstract #3110
Optimal Permittivity of Dielectric Liners and their Effects on Transmit Array Performance
Atefeh Kordzadeh 1 and Nicola DeZanche 2
1
Biomedical Engineering, University of
Alberta, Edmonton, Alberta, Canada,
2
Department
of Medical Physics, Cross Cancer Institute and
University of Alberta, Edmonton, Alberta, Canada
Dielectric pads are used as an effective method to
increase the signal locally and also increase the RF
field homogeneity in high-field MRI. Here we investigate
the effect of dielectric liners of various
permittivities on the transmit performance of a head
coil array at 4.7T. Results show that field homogeneity
and sensitivity are competing goals and a compromise is
needed based on the application. An optimal value for
permittivity is found which is lower than values which
are commonly used in the literature.
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