Findings on High-Resolution Computed Tomography

Bronchial Abnormalities

Most of the bronchi in patients with asthma have normal or decreased internal diameters. Bronchial wall thickening is common (44 to 92%). However, in -30 to 40% of adult patients with uncomplicated asthma, one or more bronchi are dilated. The bronchiectasis in patients with uncomplicated asthma typically is cylindrical, and the bronchoarterial diameter ratio is less than 1.5.

Bronchiolar Abnormalities