Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart appears mildly enlarged . The cardiac , mediastinal and hilar contours are stable . There is no pleural effusion or pneumothorax . Particularly allowing for relatively low lung volumes on the lateral view , the lungs are probably clear . There is no pleural effusion or pneumothorax . Bony structures appear unchanged .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .