Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged with a left ventricular configuration . The mediastinal and hilar contours appear within normal limits without change . Streaky left basilar opacity suggests minor atelectasis or scarring , but otherwise , the lung fields appear clear . There is no definite pleural effusion or pneumothorax . An old healed right posterior ninth rib fracture appears unchanged .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .