Abstract #1356
Single and Multiple Coaxial Inputs to Excite a Cylindrical Waveguide for Traveling Wave MRI at 21.1 T
Jose A Muniz 1,2 , Smriti Sagaram 1,3 , Jens T Rosenberg 1,2 , and Samuel Colles Grant 1,2
1
National High Magnetic Field Laboratory, The
Florida State University, Tallahassee, FL, United
States,
2
Chemical
& Biomedical Engineering, The Florida State University,
Tallahassee, FL, United States,
3
Electrical
& Computer Engineering, The Florida State University,
Tallahassee, FL, United States
In traveling wave MRI, propagating RF fields are excited
through an antenna located at a distance to a given
sample such that excitation and detection in MRI can be
induced in the far field [1-3]. In this project,
traveling wave MRI at ultra-high field is implemented
using a concentric waveguide composed of a dielectric
filled inner cylinder and an outer copper cylinder with
dimensions similar to the magnet bore of a vertical 21.1
T ultra-wide bore magnet. Uniquely, this waveguide is
excited by coaxial inputs at single and multiple points.
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