Traveling Wave MRI at 7T Using Dielectric Wave-Guide
Zhiyue J Wang1,2, Alexander Ivanishev1, Keith M Hulsey1, Dah-Jyuu Wang3, and Robert E Lenkinski1
1UT Southwestern Medical Center, Dallas, TX, United States, 2Children's Medical Center Dallas, Dallas, TX, United States, 3Children's Hospital of Philadelphia, Philadelphia, PA, United States
Traveling
wave MRI uses a wave-guide for RF transmission. The metal bore of the scanner magnet serves as
a wave-guide and extensions using conductor sheets may be added. Although
dielectric materials are frequently introduced into the system, their intended function
has been to modify the behavior of the wave-guide. In this work, we show that a
dielectric material may be used as a wave-guide by itself, in a fashion similar
to optic fibers guiding light transmission. We conducted MRI experiments at 7T
using an insulator wave-guide constructed by filling a PVC tube with
deionized water.
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