Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unremarkable with minimal atherosclerotic calcifications of the aortic knob noted . Pulmonary vasculature is normal . Lungs are hyperinflated but clear without focal consolidation . No pleural effusion or pneumothorax is seen . Moderate multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .