High resolution computed tomography of chronic hypersensitivity pneumonitis

High resolution computed tomography (HRCT) from a patient with chronic hypersensitivity pneumonitis. Image A from the upper lung zone shows a bronchocentric pattern of reticular opacities and traction bronchiectasis. Vaguely centrilobular ground-glass opacities are also present. Image B from a lower lung zone shows a peripheral, predominantly reticular pattern with traction bronchiectasis and honeycombing.