title: Quantitative computed tomography imaging in chronic obstructive pulmonary disease.
abstract: Chronic obstructive pulmonary disease (COPD) is a heterogeneous disease having small airway inflammation, emphysema, and pulmonary hypertension. It is now clear that spirometry alone cannot differentiate each component. Quantitative computed tomography (QCT) is increasingly used to quantify the amount of emphysema and small airway involvement in COPD. Inspiratory CT guides in assessing emphysema while expiratory CT identifies areas of air trapping which is a surrogate of small airway inflammation. By constructing a three-dimensional model of airways, we can also measure the airway wall thickness of segmental and subsegmental airways. The aim of this review is to present the current knowledge and methodologies in QCT of the lung that aid in identifying discrete COPD phenotypes.
authors.affiliation: Department of Pulmonary Medicine, Goa Medical College, Goa, India.
authors.forename: Lalita
authors.initials: L
authors.lastname: Fernandes
authors.affiliation: Department of Radiology, Goa Medical College, Goa, India.
authors.forename: Yasmin
authors.initials: Y
authors.lastname: Fernandes
authors.affiliation: Department of Pulmonary Medicine, Goa Medical College, Goa, India.
authors.forename: Anthony Menezes
authors.initials: AM
authors.lastname: Mesquita
keywords: Airway wall thickening; chronic obstructive pulmonary disease; imaging; physiopathology; pulmonary emphysema; quantitative computed tomography