Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is improved expansion of the lungs . Pulmonary edema in the upper lung zones has improved . Compared to the prior exam , there is new opacity at the bases which may represent atelectasis or dependent residual edema ; however , aspiration or aspiration pneumonia can not be excluded . The heart remains significantly enlarged . Linear opacities in the left mid lung zone is compatible with atelectasis . There is no pneumothorax . There are small effusions .
    OUTPUT:
    
Overall improved pulmonary edema , but worsening bibasilar opacities which may represent atelectasis or residual dependent edema ; however , aspiration or aspiration pneumonia is also possible . Short - term followup radiographs may be helpful .