Study Status: Completed
Recruit Status: Completed
Study Type: Observational
Official Title: QUANTitative Chest Computed Tomography UnMasking Emphysema Progression in Alpha-1 Antitrypsin Deficiency
Brief Summary: Individuals with a deficiency of alpha-1 antitrypsin (AAT) often develop emphysema. Traditional lung function tests may not be the most accurate way to measure the progression of emphysema. This study will compare high resolution computed tomography (CT) scans to spirometry to measure the progression of emphysema.