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Abstract #4028

Multilayer Radiofrequency Coils: A Novel Surface Coil Design for Improved B1+ Efficiency and Signal-to-Noise

Tony Zhou1,2, Justin YC Lau1,2, Jack JJJ Miller1,2,3, Navjeet Chhina4, Christopher Randell4, and Damian J Tyler1,2
1Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, United Kingdom, 2Oxford Centre for Clinical Magnetic Resonance Research, University of Oxford, Oxford, United Kingdom, 3Department of Physics, University of Oxford, Oxford, United Kingdom, 4PulseTeq LTD, Chobham, United Kingdom

Surface transmitters are often B1+ limited for X-nuclear applications due to hardware limitations of broadband power amplifiers. For both X-nuclear MRI and proton MRI, improved signal detection is always desired. Commonly, signal is measured using surface radiofrequency loop coils or coil arrays. We propose a novel surface coil design using stacked copper layers from one continuous track for increased magnetic flux and sensitivity over a central region of the coil. ‘Multilayer’ designs promise increased B1+ efficiency and Signal-to-Noise, seen using electromagnetic simulations and verified experimentally when compared to conventional loop coils over a range of diameters.

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