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Abstract #1479

RF Wave and Energy Propagation in High Field MRI

Christopher M. Collins1, Chienping Kao1, Andrew G. Webb2

1PSU College of Medicine, Hershey, PA, United States; 2Leiden University Medical Center, Leiden, Netherlands

As shown in both animations of B1 field magnitude through time and Poynting vector analysis, travelling waves have significantly shorter length and slower speed in human tissues than in the surrounding air, and thus experience significant refraction at the surface of the body, resulting in a direction of travel within the body that is fairly independent of the original source. Nevertheless, how these waves interfere within the body to create B1 and E1 field patterns relevant to MRI depends very much on the position, geometry, and orientation of the source(s).