Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Chest radiograph of a heavy smoker (38 pack years) showing an increase in overall lung markings with numerous small nodules, singular linear opacities and diffuse bronchial wall thickening; the normal lung markings are partially obscured. The finding is comparable to the profusion score of 2/1 according to the International Labour Organization classification.
