Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mildly enlarged . Mediastinal and hilar contours are within normal limits . Pulmonary vasculature is normal . Minimal patchy opacities in the lung bases may reflect areas of atelectasis though infection can not be completely excluded . No pleural effusion or pneumothorax is identified . No acute osseous abnormality is seen .
    OUTPUT:
    
Minimal bibasilar patchy opacities , likely atelectasis . Infection can not be completely excluded .