Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . Lungs are hyperinflated without focal consolidation . Linear opacities in the lung bases likely reflect areas of atelectasis or scarring . No focal consolidation , pleural effusion or pneumothorax is present . Moderate multilevel degenerative changes are re - demonstrated . Remote left - sided rib fractures are again noted .
    OUTPUT:
    
No acute cardiopulmonary abnormality .