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Abstract #1578

Water-tunable Spiral Metamaterial Resonator for Radiofrequency Field Enhancement for Receive Coils at 1.5T

Elizaveta Motovilova1, Srikumar Sandeep1, Michinao Hashimoto1, and Shao Ying Huang1,2

1Engineering Product Development, Singapore University of Technology and Design, Singapore, Singapore, 2Department of Surgery, National University of Singapore, Singapore, Singapore

We present a low-profile tunable spiral metamaterial resonator for radio-frequency field enhancement and penetration increase for receive coils at 1.5T MRI. The resonator consists of a dielectric substrate with a cavity for water deposition and two conducting spirals placed on each side of the substrate. The proposed structure is placed between a receive loop-coil and a load. The resonance frequency of the coil-spiral system can be varied within a range of 15MHz by changing the water volume in the cavity from 0ml to 12ml. The system shows a magnetic field refocusing and enhancement with a considerable increase in penetration depth.

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