Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal . Mediastinal and hilar contours are unchanged . Pulmonary vasculature is not engorged . Lungs are clear . No pleural effusion , focal consolidation or pneumothorax is present . Moderate multilevel degenerative changes are seen in the thoracic spine . Diffuse gaseous distention of colonic loops of bowel is noted .
    OUTPUT:
    
No acute cardiopulmonary abnormality .