Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Probable background hyperinflation / COPD , though inspiratory volumes on the frontal view are slightly low . Again seen are sternotomy wires and multiple mediastinal clips , with linear radiodensities seen adjacent to the right mainstem bronchus , similar to the prior study . The cardiomediastinal silhouette is unchanged . No CHF or effusion . Subsegmental atelectasis is present at both lung bases . However , no focal consolidation is identified . Within the limits of plain film radiography , no hilar adenopathy or pulmonary nodules are identified . ( Subtle abnormalities might not be apparent radiographically . ) biapical pleural thickening is similar to the prior study . Again seen is slight accentuation of thoracic kyphosis , with minimal degenerative changes and slight nonacute wedging of multiple mid thoracic vertebral bodies . Relative increased density of the T12 vertebral body is compatible with previously described findings .
    OUTPUT:
    
1 . Bibasilar atelectasis . Probable background COPD . 2 . No CHF or focal consolidation identified . 3 . No obvious pulmonary metastasis , though small nodules could be radiographically occult . 4 . Sclerotic T12 vertebral body again noted , not fully evaluated .