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.