Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is borderline enlarged . Mediastinal and hilar contours are within normal limits . Pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is present . Mild to moderate multilevel degenerative changes are seen throughout the imaged thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .