Signal-to-noise ratio, T2 , and T2* for hyperpolarized helium-3 MRI of the human lung at three magnetic field strengths. - Komlosi P; Altes TA; Qing K; Mooney KE; Miller GW; Mata JF; de Lange EE; Tobias WA; Cates GD Jr; Mugler JP 3rd (Magnetic resonance in medicine, 2017)