title: Significance of irregular opacities in the radiology of coalworkers' pneumoconiosis.
mesh_terms: D001344:Autopsy; D003032:Coal Mining; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D011009:Pneumoconiosis / Q000000981:diagnostic imaging*; D011656:Pulmonary Emphysema / Q000000981:diagnostic imaging; D011859:Radiography; D013147:Spirometry