Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . The aorta is mildly tortuous and demonstrates minimal aortic knob calcification , unchanged . The mediastinal and hilar contours are stable . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . The pulmonary vascularity is not engorged . The lungs are hyperinflated with flattening of the diaphragms . There are multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .