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Abstract #1192

Spin-echo imaging at 0.55T using a spiral trajectory

Rajiv Ramasawmy1, Daniel A Herzka1, Matthew C Restivo1, Ipshitta Bhattacharya1, Robert J Lederman1, and Adrienne E Campbell-Washburn1

1National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD, United States

Low field MRI combined with modern system engineering is attractive for high quality imaging with reduced production and operation costs. Moreover, there are potential clinical opportunities afforded by the reduced SAR and reduced local susceptibility. However, for a low field system to be clinically useful, neuroimaging must be feasible. Here we explore the potential of spiral neuroimaging at 0.55T to regain SNR that is sacrificed by moving to low field. We show that we can use a 30 ms spiral readout at 0.55T without the need for off-resonance correction and generate a 2.6x gain in SNR compared to Cartesian imaging protocols.

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