High-resolution CT scan is currently the best imaging technique for as
sessment of diseases of the bronchioles. This article describes the an
atomic basis for the findings. This is followed by a presentation of t
he findings in bronchiolitis, as it is currently classified, into five
main groups: (1) cellular bronchiolitis, (2) panbronchiolitis, (3) re
spiratory bronchiolitis, (4) constrictive bronchiolitis, and (5) bronc
hiolitis obliterans with intraluminal polyps.