Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low , resulting in crowding of bronchovascular structures . Bibasilar opacities are likely atelectasis , however , pneumonia could be considered in the correct clinical setting . There is no pleural effusion or pneumothorax . Bilateral hilar lymphadenopathy is unchanged . Heart is mildly enlarged but unchanged . There is mild pulmonary edema .
    OUTPUT:
    
1 . Bibasilar opacities are likely atelectasis with low lung volumes , however , pneumonia could be considered in the correct clinical setting . 2 . Mild pulmonary edema .