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Abstract #5249

Toward the development of a B0 gradientless MRI system: Frequency-encoded Frequency-modulated Rabi Encoded Echoes.

Efraín Torres1,2, Parker Jenkins1,2, Djaudat Idiyatullin2, Taylor Froelich2, Lance DelaBarre2, Daniel Pizetta3, Julia Marcolan3, Alberto Tannus3, and Michael Garwood2
1Biomedical Engineering, University of Minnesota, Minneapolis, MN, United States, 2Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, Minneapolis, MN, United States, 3Centro de Imagens e Espectroscopia por Ressonância Magnética - Physics Institute of São Carlos, University of São Paulo, São Paulo, Brazil

Synopsis

Keywords: RF Pulse Design & Fields, Low-Field MRI, B1 Imaging

Frequency-encoded Frequency-modulated Rabi Encoded Echoes (FE-FREE) is a new method to perform spatial encoding using a B1 field gradient. FE-FREE is analogous to conventional frequency-encoding with a B0 gradient, except a B1 gradient is used. A first demonstration of FE-FREE is shown using the B1 gradient of a surface coil in a 0.5 T magnet with large B0 inhomogeneity (±3 ppm). Frequency encoding with FE-FREE is one approach that in the future might enable low cost MRI scanners without B0 gradient hardware and infrastructure.

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Abstract

Keywords