Dielectric enhanced dipoles for MRI - Approaching the ideal current pattern

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Dielectric enhanced dipoles for MRI - Approaching the ideal current pattern

Conference Paper (2017)

Author(s)

W.M.. Brink (Leiden University Medical Center)

J. Paska (New York University School of Medicine)

J. Dai (Leiden University Medical Center)

J.H.F. van Gemert (TU Delft - Microwave Sensing, Signals & Systems)

G. Chen (New York University School of Medicine)

G.C. Wiggins (New York University School of Medicine)

R.F. Remis (TU Delft - Signal Processing Systems)

C.M. Collins (New York University School of Medicine)

A.G. Webb (Leiden University Medical Center)

Microwave Sensing, Signals & Systems

DOI related publication

https://doi.org/10.1109/ICEAA.2017.8065489

Sensitivity Radio frequency Permittivity Dielectrics Inductors Signal to noise ratio

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https://resolver.tudelft.nl/uuid:f7bcff3c-7339-43d2-a99e-3a9987500dbf

More Info

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Publication Year

2017

Language

English

Microwave Sensing, Signals & Systems

Pages (from-to)

1220-1223

ISBN (electronic)

978-1-5090-4451-1

Abstract

In this work we present a systematic evaluation of the potential of combining dielectric materials with an array of electric dipoles for MRI. Design parameters include the permittivity and length of a dielectric sleeve, as well as the dipole length and position of the tuning inductors. Results show that the combined approach improves transmit efficiency and SNR by ~10 to 15 % compared to an optimized dipole array without dielectric sleeve. The resulting induced current densities reflect an improved correspondence with the ideal current pattern, which explains the gains in performance.

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