Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . Mediastinal and hilar contours are normal . There is minimal atherosclerotic calcification at the aortic knob . Pulmonary vasculature is normal . Lungs are clear . No focal consolidation , pleural effusion or pneumothorax is demonstrated . Minimal is scarring is noted in the lung apices . There are mild multilevel degenerative changes within the mid thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .