Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart appears borderline in size . The mediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . A streaky posterior lower lobe opacity is unchanged and most consistent with minor atelectasis . Compared to prior radiograph , there has also been no significant change , including asymmetric mild - to - moderate widening of the right acromioclavicular joint , which may be post-traumatic .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .