Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The aorta is slightly tortuous . Mediastinal and hilar contours are otherwise unremarkable . Heart is mildly enlarged . On a background of mild pulmonary edema and low lung volumes , there are bibasilar opacifications , right greater than left , likely atelectasis although pneumonia can not be excluded . Mild degenerative changes in thoracic spine .
    OUTPUT:
    
Mild pulmonary edema . Basilar opacification , may be due to atelectasis , consolidation not excluded . Elevated / eventration of right hemidiaphragm seen on subsequent CT .