Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The mediastinal and hilar contours are unchanged . Pulmonary vasculature is not engorged . Lungs are hyperinflated without focal consolidation . Minimal atelectasis is noted in the left lung base . No pleural effusion or pneumothorax is present . There are mild multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .