Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is moderately enlarged but unchanged . The mediastinal and hilar contours are similar . There is mild pulmonary edema , though not substantially changed from the previous exam . Small bilateral pleural effusions are increased in size compared to the prior exam . Bibasilar airspace opacities may reflect atelectasis . No pneumothorax is identified . No acute osseous abnormality is present .
    OUTPUT:
    
Mild pulmonary edema and small bilateral pleural effusions .