Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unchanged and within normal limits . Pulmonary vasculature is normal . Linear opacities in the lingula are compatible with subsegmental atelectasis or scarring . Lungs are otherwise clear . No focal consolidation , pleural effusion or pneumothorax is present . Moderate multilevel degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .