Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . Mild atherosclerotic calcifications are seen at the aortic knob . The pulmonary vasculature is normal . Lungs are hyperinflated but clear . No focal consolidation , pleural effusion or pneumothorax is present . Moderate multilevel degenerative changes are present in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .