Clinical Research Directory

Inclusion Criteria: * Adults ages 18 years and older * Participant must be able to hold their breath for up to 16 seconds Exclusion Criteria: * History of heart defect * Pregnancy or positive pregnancy test * History of uncontrolled asthma defined for this study as requiring use of rescue inhaler ≥ 2 times in past month. * Symptoms of respiratory infection (loose or productive cough or wheeze), chest tightness, or sinus infection within past week. * Baseline oximetry at MRI visit of less than 95% on room air or less than 95% on a previously prescribed dosage of oxygen delivered by nasal cannula. * Participant is claustrophobic and unable to tolerate the imaging. * Standard MRI exclusions (metal, implants).