Abstract #4094

Improving B1 fields and SNR for Proton MRI and MRSI at 7T using 4-piece Helmet filled with High Dielectric Constant (HDC) Material

Soo Han Soon¹, Byeong-Yeul Lee¹, Hannes M. Wiesner¹, Matt Waks¹, Parker Jenkins¹, Navid Pourramzan Gandji², Sebastian Rupprecht², Qing X. Yang², Xiao-Hong Zhu¹, and Wei Chen¹

¹CMRR, Department of Radiology, University of Minnesota, Minneapolis, MN, United States, ²CNMRR, Department of Neurosurgery, Penn State University, State College, PA, United States

Ultrahigh-field (UHF) MR systems allow non-invasive images with high sensitivity and spatiotemporal resolution. High dielectric constant (HDC) material utilized with RF coils has been shown to be promising for further improving RF transmitting power efficiency and increasing the signal-to-noise ratio (SNR) in previous studies. This work focuses on the application of a 4-piece HDC helmet-shaped former to different types of coils to demonstrate the consistency of improvement in B1 fields at 7T. The technology could enhance SNR and efficiency of RF transmission for brain ¹H MR imaging application at UHF.

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