Hyperpolarized 129Xe MR Imaging of Lung Function in Healthy Volunteers and Subjects With Pulmonary Disease

Inclusion Criteria: Healthy Volunteers: * Subject has no diagnosed pulmonary conditions * Ability to read and understand English or Spanish Subjects with Lung Disease: * Subject has a diagnosis of pulmonary dysfunction made by a physician * No acute worsening of pulmonary function in the past 30 days * Ability to read and understand English or Spanish Exclusion Criteria: * MRI is contraindicated based on responses to MRI screening questionnaire * Subject is pregnant or lactating * Subject does not fit into 129Xe vest coil used for MRI * Subject cannot hold his/her breath for 15-16 seconds * Subject deemed unlikely to be able to comply with instructions during imaging * Oxygen saturation \<88% on room air or with supplemental oxygen * Cognitive deficits that preclude ability to provide consent * Institutionalization