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Abstract #3815

Reducing SAR and Enhancing SNR with High Permittivity Dielectrics (ε) at 3T

Qing X. Yang1,2, Jianli Wang1, Jinghua Wang3, Chunsheng Wang1, Christopher M. Collins1, Michael B. Smith4

1Radiology, Penn State University College of Medcine, Hershey, PA, United States; 2Neurosurgery, Penn State University College of Medicine, Hershey, PA, United States; 3Magnetic Resonance Research Center, Yale University School of Medicine, New Haven, CT, United States; 4Novartis Institutes for BioMedical Research, Inc.

Experimental results of human head imaging at 3T showed that padding around the human head containing appropriate amount of high dielectric material (~ 70) such as water reduced the input RF power for an 180 excitation pulse by 50% while enhancing image SNR by as much as 40%. Our experimental results demonstrated that placement of high ε pad enhanced B1 in the head and, thus, offers an effective approach for RF engineering.