Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ON a background of mild pulmonary edema , there are small bibasilar opacification likely a combination of atelectasis and small pleural effusions . Cardiomediastinal and hilar contours are normal . Calcifications are noted within the aortic arch . No osseous abnormality is present .
    OUTPUT:
    
Bibasilar opacifications likely combination of atelectasis and effusion , though pneumonia is a consideration in the appropriate clinical setting .