Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vascularity is normal . Minimal bibasilar atelectasis is present , but improved compared to the prior exam . No focal consolidation , pleural effusion or pneumothorax is seen . No acute osseous abnormalities are present . A left humeral head anchor is present .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Low lung volumes .