Emphysema Index Based on Hyperpolarized 3He or 129Xe Diffusion MRI: Performance and Comparison with Quantitative CT and Pulmonary Function Tests. - Tafti S; Garrison WJ; Mugler JP 3rd; Shim YM; Altes TA; Mata JF; de Lange EE; Cates GD Jr; Ropp AM; Wang C; Miller GW (Radiology, 2020)