RT Journal Article SR Electronic T1 Regional lung function in asbestos workers. JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 40 OP 44 DO 10.1136/thx.32.1.40 VO 32 IS 1 A1 Seaton, D YR 1977 UL http://thorax.bmj.com/content/32/1/40.abstract AB Regional lung function was measured using radioactive xenon-133 in a group of normal subjects and in two groups of asbestos workers. When compared with the normal group, patients with pulmonary asbestosis showed impaired ventilation of the lower zones. Subjects with calcified pleural plaques without radiological evidence of lung parenchymal fibrosis did not show this abnormality.