Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mildly enlarged . The mediastinal and hilar contours are unchanged . The pulmonary vasculature is not engorged . Lungs are hyperinflated but clear . No pleural effusion or pneumothorax is seen . Partially imaged is bilateral posterior fusion hardware within the thoracolumbar spine . There are moderate multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .