Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral , diffuse , confluent pulmonary opacities is concerning for severe pulmonary edema / ARDS / hemorrhage ; although a concurrent infection can not be excluded . Heart size is normal . Because of the diffuse pulmonary opacities obscuration the margins of the mediastinal and hilar contours , assessment was .
    OUTPUT:
    
Bilateral , diffuse , confluent pulmonary opacities . Differential diagnosis include severe pulmonary edema or ARDS or hemorrhage . Concurrent lung infection can not be ruled out .