Keywords: Hybrid & Novel Systems Technology, Body, metamaterial
The transmit field suffers from standing wave inhomogeneities at field strengths ≥3T, which degrade image quality and create specific absorption rate (SAR) hotspots. We present the first experimental demonstration of a whole-body metamaterial liner (metaliner) that enables traveling wave excitation at a lower frequency than achievable otherwise. The simulated transmit efficiencies for a comparable birdcage and metaliner were 2.43μT⁄√kW±23.8% and 1.80μT⁄√kW±25.5% respectively, and the maximum 10g local SAR was reduced by 18% with the metaliner. This shows that the metaliner is an attractive alternative to the BC with greater safety thanks to the lower localized SAR.
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