Abstract #0391

Disentangling Signal propagation and Noise-related Effects in the Presence of High Permittivity Materials via Ideal Current Patterns

Manushka V. Vaidya^1,2,3, Christopher M. Collins^1,2,3, Daniel K. Sodickson^1,2,3, Giuseppe Carluccio^1,2, and Riccardo Lattanzi^1,2,3

¹Center for Advanced Imaging Innovation and Research (CAI2R), Department of Radiology, New York University School of Medicine, New York, NY, United States, ²Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University School of Medicine, New York, NY, United States, ³Sackler Institute of Graduate Biomedical Sciences, New York University School of Medicine, New York, NY, United States

There is no single mechanism to describe how high permittivity materials (HPMs) improve signal-to-noise ratio when placed between radiofrequency coils and the object. We separately investigated the effects of HPMs on signal propagation and sample noise by studying ideal current patterns, the corresponding optimal electric (E) field and a signal-only propagation model. Our results suggest that phase changes in the ideal current patterns with HPMs are primarily due to signal-propagation effects while their increase in size is due to reduced E field penetration into the sample, which allows larger current patterns that maximize signal reception with a limited noise penalty.

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