Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Linear opacities in the lung bases likely reflect subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . Multilevel moderate degenerative changes with anterior bridging osteophytes are seen in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .