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Abstract #1808

New tuHDC BST-BT Ceramics with Optimal Permittivity Greatly Improve B1 efficiency and SNR at Room Temperature for 17O MRSI Application at 10.5T

Hannes Michel Wiesner1, Xiao-Hong Zhu1, Maryam Sarkarat2, Xin Li1, Matt Waks1, Michael T. Lanagan2, Qing X. Yang3, and Wei Chen1
1CMRR, Department of Radiology, University of Minnesota, Minneapolis, MN, United States, 2Department of Engineering, Pennsylvania State College of Engineering, University Park, PA, United States, 3CNMRR, Department of Neurosurgery, Penn State University, Hershey, PA, United States

Recently we reported that the ceramics made of composite BST (Ba0.6Sr0.4TiO3) material have an extremely high tunability of relative permittivity when changing the ceramic temperature; and by cooling the ceramics to 14-15 °C, they provided the best improvement for 17O MRSI application at 10.5T, resulting in an optimal permittivity of ~6000. In this study, we developed new ceramic disks made of mixed Ba0.6Sr0.4TiO3 and BaTiO3 (BST-BT) materials to achieve the optimal permittivity at room temperature. The results indicate that unprecedented performance is possible for 17O MRSI application at 10.5T without the need of a temperature controller.

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