Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is top normal . Mediastinal and hilar contours are normal . Pulmonary vasculature is normal . Lungs are clear . No focal consolidation , pleural effusion or pneumothorax is present . Degenerative changes are noted within the imaged lower thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .