Abstract #4816
Characterization of a Dielectric Phantom for High-Field MRI Applications
Qi Duan 1 , Jeff H. Duyn 1 , Natalia Gudino 1 , Jacco A. de Zwart 1 , Peter van Gelderen 1 , Daniel K. Sodickson 2,3 , and Ryan Brown 2,3
1
AMRI, LFMI, National Institute of
Neurological Disorders and Stroke, National Institutes
of Health, Bethesda, Maryland, United States,
2
The
Bernard and Irene Schwartz Center for Biomedical
Imaging, Department of Radiology, New York University
School of Medicine, New York, United States,
3
NYU
WIRELESS, Polytechnic Institute of New York University,
New York, United States
In order to predict wavelength effects on MRI
performance and tissue heating at high field, a generic
recipe for an inexpensive and nontoxic phantom with
biologically-relevant dielectric properties was
developed. The recipe includes deionized water, NaCl,
sucrose, and benzoic acid. 117 samples were prepared
with a range of NaCl and sucrose concentrations, and
their dielectric properties were measured and fitted to
a three-dimensional polynomial. Nonlinear relationships
between sucrose and NaCl concentrations and measured
dielectric properties were observed, and strong
interactions were found between individual component
concentrations in determining dielectric properties.
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