Christopher T. Sica1, Sebastian Rupprecht1, Ray Luo2, Zhipeng Cao2, Raffi Sahul3, Seongtae Kwon3, Michael T. Lanagan4, Christopher Collins5, Qing Yang1, 6
1Radiology, Penn State College of Medicine, Hershey, PA, United States; 2Bioengineering, Pennsylvania State University, University Park, PA, United States; 3TRS Technologies Inc, State College, PA, United States; 4Engineering Science and Mechanics, Pennsylvania State University, University Park, PA, United States; 5Radiology, New York University, New York, United States; 6Neurosurgery, Penn State College of Medicine, Hershey, Pennslyvania, United States
A new high dielectric constant material, in the form of monolithic blocks of relative permittivity ~800, is evaluated for local enhancement of B1+ and SNR at 3T. Phantom studies show up to a two fold increase in SNR close to the blocks along with gains in transmit efficiency. An in-vivo study of the brain showed SNR gains up to 40% in a localized region close to the blocks, a reduction of transmission power by 50%, and local gains in transmit efficiency. Parallel imaging performance in the brain was evaluated and was minimally affected by the presence of the HDC blocks.