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Abstract #3899

The Metaslab: A combined Metamaterial and Metasurface for Improved Transmit Performance and Use as a Receive Array.

Lauren Smart1, Adam Mitchell Maunder2, Ashwin K. Iyer1, and Nicola De Zanche2
1Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada, 2Oncology, Medical Physics, University of Alberta, Edmonton, AB, Canada

Synopsis

Keywords: RF Arrays & Systems, Body, metamaterial

Abdominal and thoracic imaging at 3T suffers from inhomogeneous transmit fields and hot-spots in specific absorption rate (SAR) that limit image quality and imaging efficiency, respectively. We combine a lightweight metamaterial and metasurface (the ‘metaslab’) to enhance transmit efficiency and homogeneity, as well as to reduce SAR. The metaslab is further able to operate as a receive array with four distinct sensitivity patterns and sensitivity comparable to that of a conventional 4-element loop receive array. The metaslab is much lighter than comparable dielectric pads and achieves all these benefits in a similar package as a conventional coil array.

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