Abstract #0430

Toward Human Head Imaging at 10.5T Using an Eight-Channel Transmit/Receive Array of Bumped Fractionated Dipoles

Alireza Sadeghi-Tarakameh^1,2, Angel Torrado-Carvajal³, Russell L. Lagore⁴, Sean Moen⁴, Xiaoping Wu⁴, Gregor Adriany⁴, Gregory J. Metzger⁴, Lance DelaBarre⁴, Kamil Ugurbil⁴, Ergin Atalar^1,2, and Yigitcan Eryaman⁴

¹Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey, ²National Magnetic Resonance Research Center (UMRAM), Ankara, Turkey, ³Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, United States, ⁴Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States

Ultra-high field (UHF)-magnetic resonance imaging (MRI) provides numerous benefits such as significant increase in signal-to-noise ratio (SNR), however, increasing the field strength, the local specific absorption rate (SAR) starts to become a limiting factor. Utilizing a TxArray coil with improved SAR performance may provide a good solution for this issue. In this study, we designed and built an eight-channel transmit/receive array of bumped fractionated dipoles for head imaging at 10.5T. We established a good agreement between simulations and experiments in order for RF safety validations. In addition, a cadaver head was imaged using pTx pulses to evaluate the imaging performance.

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