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Abstract #2876

Large denoising effect of ultrahigh dielectric constant (uHDC) materials 

Navid Pourramzangandji1, Christopher Sica2, Byeong-Yeul Lee3, Hannes Wiesner3, Maryam Sarkarat4, Michael Lanagan4, Xiao-Hong Zhu3, Wei Chen3, and Qing Yang1
1Department of Neurosurgery, PennState University College of Medicine, Hershey, PA, United States, 2Department of Radiology, PennState University College of Medicine, Hershey, PA, United States, 3CMRR, Department of Radiology, University of Minnesota, Minneapolis, MN, United States, 4Department of Engineering Science and Mechanics, Pennsylvania State University, State College, PA, United States

We investigated the effect of ultrahigh dielectric constant (uHDC) materials on reducing the noise and enhancing B1 efficiency at 78-MHz for low-γ nuclear applications (23Na and 13C at 7T or 61-MHz for 17O at 10.5 T). By employing uHDC materials, the conservative E-field can be reduced in the sample, which makes the non-conservative field dominant and increases the transmit efficiency and receive sensitivity. We calculated the normalized noise level and extracted the B1+ efficiency map for baseline (no uHDC) and when uHDC is used, and show experimentally that noise level is reduced considerably in the presence of the UHDC material.

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