Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mildly enlarged . The mediastinal and hilar contours are unchanged and there is mild pulmonary vascular congestion , similar compared to the previous exam . Trace right pleural effusion appears decreased in size compared to the prior exam . Patchy bibasilar airspace opacities could reflect atelectasis . No pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild pulmonary vascular congestion and decreased trace right pleural effusion . Bibasilar patchy opacities likely reflect atelectasis .