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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