title: The chest radiograph in chronic obstructive lung disease compared with measurements of single-breath nitrogen washout and spirometry.
abstract: Postero-anterior and lateral chest radiographs were taken in 56 patients with chronic obstructive lung disease in whom the forced expiratory volume (FEV1), total lung capacity (TLC), the residual volume (RV) and the slope of phase III (S3) on the single breath nitrogen washout test (SBN2) were known. The shape and the level of the diaphragm and the shape of the costophrenic sulci, were determined from the chest films and were found to correlate with S3 and FEV1 but not TLC or RV/TLC%.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005541:Forced Expiratory Volume; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008875:Middle Aged; D009584:Nitrogen / Q000032:analysis*; D011656:Pulmonary Emphysema / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011859:Radiography; D012129:Respiratory Function Tests; D013147:Spirometry
chemical_list: D009584:Nitrogen