B1- gradient- based MRI using frequency- modulated Rabi- encoded echoes - Torres, Efraín; Froelich, Taylor; Wang, Paul; DeLaBarre, Lance; Mullen, Michael; Adriany, Gregory; Pizetta, Daniel Cosmo; Martins, Mateus Jose; Vidoto, Edson Luiz Gea; Tannús, Alberto; Garwood, Michael (Magnetic Resonance in Medicine, 2022)