The Fain lab is dedicated to developing functional imaging of the lungs using magnetic resonance imaging (MRI). Multiple methods are in development and are actively in use for clinical research. Most prominently, ultra-short time to echo (UTE) pulmonary MRI and hyperpolarized xenon gas MRI are actively being used to study long COVID, interstitial lung disease, cystic fibrosis, lung transplant rejection and asthma. Our work has applications in understanding of environmental population health given our ability to measure ventilation and gas exchange regionally with sufficient sensitivity to detect subclinical changes not detected by conventional pulmonary function tests. The MRI techniques developed in the Fain lab are furthermore complementary to quantitative CT methods by providing functional information without using ionizing radiation.