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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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