Abstract #0767

Permittivity-Tunable Ceramic Technology for Largely Improving B1 fields and SNR for Broad MR Imaging Applications

Byeong-Yeul Lee¹, Xiao-Hong Zhu¹, Hannes M. Wiesner¹, Maryam Sarkarat², Sebastian Rupprecht³, Michael T Lanagan², Qing X Yang³, and Wei Chen¹

¹CMRR, Radiology, University of Minnesota, Minneapolis, MN, United States, ²Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, PA, United States, ³Center for NMR Research, Neurosurgery, Pennsylvania State College of Medicine, Hershey, PA, United States

We present an innovative technique of tunable ultrahigh dielectric constant (tuHDC) ceramics incorporating RF coil(s) for MR imaging applications. The ceramic has a very high permittivity tunability of 2000-15000 by varying the ceramic temperature between few to 40 °C to achieve optimal performance at the nuclide Larmor frequency of interest, resulting in larger B₁ field and SNR improvements for ¹H MRI at 1.5T clinic scanner and ¹⁷O MRSI at 10.5T human scanner. We found a large denoising effect in¹⁷O MRSI, which further boosts the SNR gain. The technology should benefit for biomedical research and clinical diagnosis.

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